A clay calcined color control system

Abstract

The present invention provides a clay calcination color control system, which includes a suspension calcination subsystem and a rotary cooling subsystem. The suspension calcination subsystem is used for preheating, calcining, decomposing and separating clay materials, and the rotary cooling subsystem is used for cooling the clay materials after calcination and decomposition; wherein the rotary cooling subsystem includes a rotatable cooler, and the cooler is provided with a first water spraying device at least at the inlet end or outlet end of the material, which is used to spray cooling water, so that the cooling water vaporizes to generate water vapor and fills the inlet or outlet part, isolates the air exchange inside and outside the cooler, and prevents the clay material from being oxidized and discolored during the cooling process, so as to achieve color control of the finished clay. The present invention performs calcination and cooling in different equipment respectively; while improving the stability of the operation of the entire system, improving the heat exchange effect, and simplifying the quality control, the present invention also achieves stable and reliable color control in production.

Description

Technical Field

[0001] The invention relates to the field of clay calcining equipment, in particular to a clay calcining color control system. Background Art

[0002] Calcining clay is a process of high temperature treatment of clay, usually refers to heating clay minerals to between 600-1000℃ to cause chemical and physical changes, thereby changing its structure and properties. This process can make clay have higher strength, hardness, fire resistance and other properties, making it suitable for a wider range of applications.

[0003] During the calcination process, clay goes through the following stages: Dehydration stage: During the heating process, the water in the clay is evaporated. This process usually occurs below 100°C and starts at about 50°C. Sintering stage: As the temperature rises, the organic matter and tiny particles in the clay gradually sinter and form a stronger particle structure. This process usually occurs between 300-500°C. Reorganization stage: As the temperature rises, the minerals in the clay begin to transform into a more tightly arranged structure, while releasing some gases. This process usually occurs between 500-800°C. Hardening stage: When the temperature reaches above 800°C, the minerals in the clay begin to melt, diffuse and recrystallize, forming a harder and more refractory substance.

[0004] The purpose of calcining clay is mainly to improve its application value in different fields by changing its structure and properties. For example, in the field of ceramic manufacturing, calcination can make clay more heat-resistant and acid-resistant, thereby producing more durable pottery and porcelain; in the field of building materials, calcination can make clay more hard and stable, thereby producing more durable bricks, tiles and other products.

[0005] The existing clay calcination system mainly has two routes: suspension calcination and rotary kiln calcination. Suspension calcination has the characteristics of high heat exchange efficiency, easy operation, and stable quality. However, the suspension calcination structure is large and the building is high, especially for raw materials with high iron content. Studies have shown that hematite in clay will eventually form magnetite when the temperature is higher than 650 degrees, whether it is calcined in a reducing atmosphere or an oxidizing atmosphere. Magnetite is dark gray, close to the color of traditional cement. When color control is performed, reducing atmosphere cooling is used, and the color cannot be well controlled. Some calcined materials will be re-oxidized during the cooling process, and blockage is also prone to occur. Similarly, the use of rotary kilns and rotary cooling to produce calcined clay has poor quality control and high heat consumption. However, rotary cooling can basically isolate the material from contact with air during the cooling process, ensuring that the calcined material is not re-oxidized during the cooling process, and the color can be well controlled.

[0006] Therefore, how to reduce the heat consumption of the system and ensure the product quality when calcining clay, and at the same time control the product color well and combine the advantages of both, is the key research content of the present invention. Summary of the invention

[0007] In view of this, an embodiment of the present invention provides a clay calcined color control system to eliminate or improve one or more defects existing in the prior art.

[0008] The technical solution of the present invention is as follows:

[0009] A clay calcination color control system, the system comprises a suspension calcination subsystem and a rotary cooling subsystem, the suspension calcination subsystem is used for preheating, calcining, decomposing and separating clay materials, and the rotary cooling subsystem is used for cooling the calcined and decomposed clay materials;

[0010] The rotary cooling subsystem comprises a rotatable cooler, wherein the cooler is provided with a first water spraying device at least at the inlet or outlet of the material, for spraying cooling water, so that the cooling water vaporizes to generate water vapor and fills the inlet or outlet, isolates the air exchange inside and outside the cooler, prevents the clay material from being oxidized and discolored during the cooling process, and realizes the color control of the finished clay.

[0011] In some embodiments, the cooler is arranged to be tilted downward from the feed end to the discharge end of the cooler, and the tilt angle thereof is 0-6°.

[0012] In some embodiments, the rotary cooling subsystem also includes a cooling water recovery device arranged below the cooler, which is used to recover cooling water used for heat exchange on the cylinder surface of the cooler. The cylinder of the cooler is used to perform heat exchange on the clay material so as to cool the clay material. The rotary cooling subsystem also includes a sealing cover arranged above the cooler, which is used to collect and condense water vapor and collect the condensed water to the cooling water recovery device or the raw water system that directly supplies water to the water spraying device.

[0013] In some embodiments, the cooler is provided with the first water spray device at both the inlet and outlet of the material, the inlet and outlet of the cooler are fixed, the middle part of the cooler is a rotatable rotating section, and the connection between the rotating section and the inlet and outlet is a sealed connection;

[0014] The cooler is provided with a second water spray device outside the shell, and the second water spray device includes different spray heads arranged from the high temperature zone to the low temperature zone, which is used to cool the outside.

[0015] In some embodiments, the temperature of the clay material at the inlet end of the cooler is configured to be 800 degrees, the temperature of the clay material in the first cooling section of the cooler is configured to be no higher than 300 degrees, and the temperature of the clay material at the outlet end of the cooler is configured to be no higher than 150 degrees, and is transported away by a conveying device.

[0016] In some embodiments, the suspension calcination subsystem includes a preheating device for preheating the clay material;

[0017] The preheating device comprises a first-stage preheating cyclone barrel and a second-stage preheating cyclone barrel, wherein the first-stage preheating cyclone barrel is located above the second-stage preheating cyclone barrel, and the first-stage preheating cyclone barrel and the second-stage preheating cyclone barrel are connected through an upward feeding pipe and a downward feeding pipe;

[0018] The first-stage preheating cyclone is provided with at least one, which has a first upper feeding area and a first lower discharging area; the second-stage preheating cyclone is provided with at least one, which has a second upper feeding area and a second lower discharging area, the first upper feeding area of ​​the first-stage preheating cyclone is connected with the second upper feeding area of ​​the second-stage preheating cyclone through the upper feeding pipeline, and the first lower feeding area of ​​the first-stage preheating cyclone is connected with the second upper feeding area of ​​the second-stage preheating cyclone through the lower feeding pipeline;

[0019] The upward feeding pipeline is provided with a feeding port or is connected with a feeding device.

[0020] In some embodiments, the suspension calcination subsystem further includes a decomposition device, which is disposed below the preheating device and is connected directly or through a pipeline to the second lower discharge area of ​​the second-stage preheating cyclone for calcining and decomposing the preheated clay material;

[0021] The decomposition device comprises a decomposition furnace, the bottom of which is connected to the second lower discharge area of ​​the second-stage preheating cyclone through a pipeline, and the top of the decomposition furnace is provided with a material outlet.

[0022] In some embodiments, the suspension calcination subsystem further comprises a hot blast furnace device for providing heat to the decomposition device;

[0023] The hot blast furnace device is provided with an oxygen content control mechanism for controlling the oxygen content of the outlet hot blast gas, thereby controlling the process atmosphere of calcining clay in the decomposition device.

[0024] In some embodiments, the fuel inlet of the hot blast stove device includes: a first fuel port for inputting natural gas, a second fuel port for inputting petroleum coke or waste oil, and a third fuel port for inputting industrial waste;

[0025] The lower part of the hot blast stove device is provided with a stepped grate plate for providing combustion-assisting air for the combustion of large pieces of garbage and collecting ashes after combustion.

[0026] In some embodiments, the suspension calcination subsystem further comprises a separation device, which is in communication with the decomposition device and is used to separate the calcined and decomposed clay material from the gas;

[0027] The separation device is also connected to the inlet end of the cooler of the rotary cooling subsystem through a pipeline.

[0028] In some embodiments, the suspension calcination subsystem further includes a dust collector, which is connected to the first upper feed zone at the top of the first-stage preheating cyclone for removing dust from the flue gas.

[0029] The clay calcination color control system of the embodiment of the present invention performs calcination and cooling in different equipment respectively; the suspension calcination subsystem is mainly used to preheat, calcine, decompose and separate the clay material, which can greatly reduce energy consumption. The rotary cooling subsystem is used to cool the clay material after calcination and decomposition. In the rotary cooling subsystem, a rotatable cooler is used and a first water spray device is set at its inlet or outlet, so that the cooling water can generate water vapor to fill the inlet or outlet, thereby preventing the clay material from being oxidized and discolored during the cooling process, and ensuring the color control of the finished clay. This system takes the advantages of the two existing clay calcination schemes, while improving the stability of the operation of the entire system, improving the heat exchange effect, and simplifying the quality control. At the same time, it also achieves stable and reliable color control in production. Reduce the structural height of the entire suspension calcination system, reduce the system pressure loss, and optimize the heat consumption and energy consumption from the overall system to achieve the purpose of carbon emission reduction.

[0030] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0031] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0033] Figure 1 Schematic diagram of the structure of a clay calcination color control system in one embodiment of the present invention.

[0034] Reference numerals:

[0035] 1. Preheating device; 11. First-stage preheating cyclone; 111. First upper feeding area; 112. First lower discharging area; 12. Second-stage preheating cyclone; 121. Second upper feeding area; 122. Second lower discharging area; 13. Upward feeding pipeline; 14. Downward feeding pipeline; 2. Decomposition device; 3. Separation device; 4. Cooler; 401. Feed end; 402. Discharging end; 403. Rotating section; 41. First water spraying device; 42. Second water spraying device; 43. Cooling water recovery device; 5. Hot blast furnace device; 51. First fuel port; 52. Second fuel port; 53. Third fuel port; 54. Stepped grate plate; 6. Feeding device; 7. Dust collector; DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0037] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0038] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0039] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0040] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0041] The invention provides a clay calcining color control system to improve system production efficiency, reduce heat consumption, and improve product quality and stability.

[0042] like Figure 1 As shown, in some embodiments, the system includes a suspension calcination subsystem and a rotary cooling subsystem, wherein the suspension calcination subsystem is used to preheat, calcine, decompose and separate the clay material, and the rotary cooling subsystem is used to cool the calcined and decomposed clay material.

[0043] The rotary cooling subsystem includes a rotatable cooler 4 (or rotary cooler 4), and the cooler 4 is provided with a first water spraying device 41 at least at the inlet or outlet of the material, for spraying cooling water, so that the cooling water is vaporized to generate water vapor and fills the inlet or outlet, isolating the air exchange inside and outside the cooler 4, and preventing the clay material from being oxidized and discolored during the cooling process, so as to achieve color control of the finished clay.

[0044] The clay calcination color control system of the embodiment of the present invention performs calcination and cooling in different devices respectively; the suspension calcination subsystem is mainly used to preheat, calcine, decompose and separate the clay material, which can greatly reduce energy consumption. The rotary cooling subsystem is used to cool the clay material after calcination and decomposition. In the rotary cooling subsystem, a rotatable cooler is used and a first water spray device is set at its inlet or outlet, so that the cooling water can generate water vapor to fill the inlet or outlet, thereby preventing the clay material from being oxidized and discolored during the cooling process, and ensuring the color control of the finished clay.

[0045] This system combines the advantages of the two existing clay calcining schemes, improving the stability of the entire system operation, improving the heat exchange effect, simplifying quality control, and achieving stability and reliability in color control during production. The structural height of the entire suspension calcining system is reduced, the system pressure loss is reduced, and the heat and energy consumption are optimized from the overall system to achieve the purpose of carbon emission reduction.

[0046] In some embodiments, the suspension calcination subsystem includes a preheating device 1 for preheating the clay material.

[0047] The preheating device 1 comprises a first-stage preheating cyclone 11 and a second-stage preheating cyclone 12, wherein the first-stage preheating cyclone 11 is located above the second-stage preheating cyclone 12, and the first-stage preheating cyclone 11 and the second-stage preheating cyclone 12 are connected through an upward feeding pipe 13 and a downward feeding pipe 14; the first-stage preheating cyclone 11 is provided with at least one first upper feeding area 111 and a first lower discharging area 112; the second-stage preheating cyclone 12 is provided with at least one , which has a second upper feeding area 121 and a second lower discharging area 122, the first upper feeding area 111 of the first-stage preheating cyclone 11 is connected with the second upper feeding area 121 of the second-stage preheating cyclone 12 through the upper feeding pipe 13, and the first lower feeding area of ​​the first-stage preheating cyclone 11 is connected with the second upper feeding area 121 of the second-stage preheating cyclone 12 through the lower feeding pipe 14; the upper feeding pipe 13 is provided with a feeding port or is connected with a feeding device 6.

[0048] The first stage preheating cyclone 11 is provided with at least one feeding area and one discharging area, which are called the first upper feeding area 111 and the first lower discharging area 112. Similarly, the second stage preheating cyclone 12 is provided with at least one feeding area and one discharging area, which are called the second upper feeding area 121 and the second lower discharging area 122. The first upper feeding area 111 of the first stage preheating cyclone 11 is connected to the second upper feeding area 121 of the second stage preheating cyclone 12 through an upward feeding pipe, and the first lower discharging area 112 of the first stage preheating cyclone 11 is connected to the second upper feeding area 121 of the second stage preheating cyclone 12 through a downward feeding pipe. In addition, a feeding port is provided on the upward feeding pipe or connected to a feeding device 6 for feeding clay materials into the preheating device 1.

[0049] like Figure 1 As shown, attached Figure 1 The dotted line in the figure and the solid arrow on the dotted line indicate the flow path and direction of the flue gas or hot air. Figure 1 The solid line and the hollow arrow on the solid line indicate the flow path and direction of the clay flow, and the material flow path and the flue gas flow path can be clearly seen.

[0050] The material delivered from the feeding device 6 is transported by the elevator and fed into the middle ascending pipe of the two-stage cyclone in the preheating device 1; the ascending pipe contains hot flue gas from the next-stage cyclone, and the raw material exchanges heat in the ascending pipe, and then is brought into the uppermost cyclone for collection and fed into the lower-stage preheating cyclone, thereby the material is preheated step by step to reach a predetermined temperature, and then fed into the decomposition furnace, while the flue gas is cooled and can then be used to dry the raw material, and finally is dusted by the dust collector and discharged into the atmosphere.

[0051] The preheating stage of clay calcination is a crucial step in the clay calcination process. It can remove moisture, organic matter, initiate chemical reactions, prepare the material for the main sintering stage, and improve the sintering effect and product quality. The specific temperature and time of the preheating process will vary according to the properties of the material and the product requirements. In the clay calcination process, the preheating stage of clay calcination has the following important functions: Remove moisture: Clay contains a large amount of free water and bound water. During the preheating process, the temperature gradually rises, and the moisture will gradually evaporate, causing the clay material to gradually lose moisture. This is the original purpose of preheating. Removing moisture helps to reduce cracking and shrinkage during sintering. Remove organic matter: Clay may contain organic matter, such as plant residues, wax, etc. The high temperature environment of preheating can decompose or volatilize these organic matter and purify the clay material. Initiate chemical reactions: During the preheating process, due to the increase in temperature, some chemical reactions will begin to occur. For example, oxidation and carbonization reactions may cause oxides to form on the surface and affect the color and texture. Reduce firing energy consumption: By preheating the clay material before heating it to high temperature, the energy required during the firing process can be reduced. Preheating can improve thermal efficiency, reduce energy consumption and production costs.

[0052] Optionally, the ground fine material is fed into the connecting pipe between the first and second level preheating cyclones after metering, and the feeding fineness is generally controlled to be less than 200um; similar to the traditional cement preheater system, the material is preheated and collected step by step from top to bottom in the preheating device 1, and the high-temperature gas is cooled step by step from bottom to top, and finally sent to the exhaust gas treatment system by the fan.

[0053] In some embodiments, the suspension calcination subsystem further includes a decomposition device 2, which is disposed below the preheating device 1 and is directly or through a pipeline connected to the second lower discharge area 122 of the second-stage preheating cyclone 12, for calcining and decomposing the preheated clay material; the decomposition device 2 includes at least one decomposition furnace, the bottom of which is connected to the second lower discharge area 122 of the second-stage preheating cyclone 12 through a pipeline to receive the preheated clay material. The top of the decomposition furnace is provided with a material outlet for discharging the calcined and decomposed material.

[0054] The lower part of the decomposition furnace is connected to the hot blast furnace. The preheated materials will react and decompose in the decomposition furnace, and the heat energy required by the decomposition furnace is provided by the hot blast furnace. The decomposition furnace only provides reaction carriers, and there is no need to feed fuel into the decomposition furnace. This can reduce the volume of the decomposition furnace. The atmosphere in the decomposition furnace can be achieved by controlling the oxygen content at the outlet of the hot blast furnace. After the materials react in the decomposition furnace, they are brought into the separation cyclone by the hot gas. The cyclone only serves to separate the materials from the gas, and then the separated materials are fed into the rotary cooler 4.

[0055] In some embodiments, the suspension calcination subsystem also includes a hot air furnace device 5 for providing heat to the decomposition device 2; the hot air furnace device 5 is provided with an oxygen content control mechanism for controlling the oxygen content of the outlet hot air gas, thereby controlling the process atmosphere for calcining clay in the decomposition device 2.

[0056] The oxygen content control of the hot air gas at the outlet of the hot blast furnace is mainly achieved by controlling the intake and air volume during the combustion process. The oxygen content control mechanism can be achieved in the following ways: 1. Reasonable adjustment of the intake volume: The size of the intake volume will directly affect the combustion of the fuel, thereby affecting the oxygen content of the outlet hot air gas. In actual operation, by adjusting the intake volume, the fuel can be fully burned, while avoiding problems such as incomplete combustion and pollution emissions caused by excessive or insufficient intake volume. 2. Control the air volume: During the combustion process, appropriate air can promote the combustion of the fuel and improve the combustion efficiency. At the same time, it can also ensure that the oxygen content of the outlet hot air gas is not too high or too low. Generally speaking, the air volume can be controlled by adjusting the speed of the fan, changing the cross-sectional area of ​​the intake duct, etc. 3. Adjust the ratio of intake and air: During the combustion process, the ratio of intake and air also has a great influence on the oxygen content of the outlet hot air gas. Reasonable proportioning according to factors such as the characteristics of different fuels, the temperature in the furnace, and the oxygen content of the outlet hot air gas can effectively control the supply of oxygen during the combustion process, thereby achieving precise oxygen content control.

[0057] In short, by reasonably adjusting the intake volume, air volume and the ratio of intake volume to air, the oxygen content of the hot air at the outlet of the hot blast furnace can be effectively controlled, thereby controlling the entire calcination process, ensuring full combustion of the fuel, improving energy utilization efficiency, and reducing environmental pollution problems.

[0058] Optionally, the fuel inlet of the hot blast stove device 5 includes: a first fuel port 51 for inputting natural gas, a second fuel port 52 for inputting petroleum coke or waste oil, and a third fuel port 53 for inputting industrial waste; a stepped grate plate 54 is provided at the lower part of the hot blast stove device 5 for providing combustion-assisting air for the combustion of large pieces of waste and collecting ashes after combustion.

[0059] In this system, the hot blast furnace, as an important heat source providing device, can ensure the stable supply of energy for the system. The hot blast furnace is provided with multiple fuel inlets, which are suitable for different fuels. Large pieces of garbage fuel are fed into the furnace by a reamer, and liquid waste oil and powdered fuel are sprayed into the furnace by a burner for combustion. A stepped grate plate 54 is provided at the lower part of the furnace hall to provide combustion-assisting air for the combustion of large pieces of garbage and collect the ashes after combustion, thereby meeting the process requirements of the entire system.

[0060] The preheated materials are collected and fed into the decomposition furnace for decomposition. The lower part of the decomposition furnace is connected to the hot blast furnace, and the outlet is connected to the separation cyclone. The energy required in the decomposition furnace is directly provided by the hot blast furnace. The separate hot blast furnace system is set up to adapt to different fuels. It can handle domestic garbage, waste and waste oil, etc. At the same time, it can also be used for normal fuels such as natural gas and petroleum coke. The calcination time of each fuel can be accurately controlled to ensure that all fuels are burned out. The decomposition furnace only needs to bear the decomposition function, thereby reducing the volume of the decomposition furnace. The atmosphere in the decomposition furnace can be adjusted by controlling the oxygen content at the outlet of the hot blast furnace to adapt to the needs of the process. Finally, the calcined and decomposed materials are brought into the separation cyclone by the airflow for separation and fed into the rotary cooler 4.

[0061] In some embodiments, the suspension calcination subsystem further comprises a separation device 3, which is connected to the decomposition device 2 and is used to separate the clay material and the gas after calcination and decomposition; the treated gas can be released into the preheating device 1 through the separation device 3, and the clay material enters the next cooling treatment after separation. The separation device 3 is also connected to the inlet end of the cooler 4 of the rotary cooling subsystem through a pipeline. In this way, the clay material after separation can enter the rotary cooling subsystem for cooling treatment, so as to further reduce the temperature and improve the quality and stability of the clay material.

[0062] In some embodiments, the suspension calcination subsystem further includes a dust collector 7, which is connected to the first upper feed zone 111 at the top of the first-stage preheating cyclone 11, and is used to remove dust from the flue gas. During the calcination process, flue gas is generated, which may contain dust and pollutants. In order to ensure a clean environment and meet emission standards, the dust collector 7 is used to capture and remove solid particles and particulate pollutants in the flue gas. By being connected to the first upper feed zone 111 at the top of the first-stage preheating cyclone 11, the dust collector 7 can effectively remove dust from the flue gas and improve the environmental performance of the calcination system.

[0063] The rotary cooling subsystem is the most important color control device of this system. The high-temperature material fed from the separation cyclone can reach up to 800 degrees and needs to be quickly cooled to less than 300 degrees to ensure that the material is not oxidized during the cooling process. At the same time, in order to keep the downstream conveying equipment within the tolerable temperature range, the final outlet temperature of the rotary cooler 4 is maintained below 150 degrees to ensure that the color of the clay material entering the inlet and outlet of the cooler 4 is the same. The clay material at the outlet of the cooler 4 can be directly transported using conveying equipment such as a reamer and a belt conveyor.

[0064] In some embodiments, the cooler 4 is arranged to be tilted downward from the feed end 401 to the discharge end 402 of the cooler 4, and the tilt angle is 0-6°. Optionally, the tilt angle of the rotary cooler 4 can be 3.5°, and the material in the cooler 4 gradually moves toward the outlet while being cooled as the cooler 4 rotates. When the required temperature is reached, the material is discharged from the cooler 4, enters the conveying device, and is finally transported to the warehouse.

[0065] The inclination angle of the rotary cooler 4 is usually considered comprehensively based on multiple factors such as the nature of the material, the location of the material inlet and outlet, the amount of water and the speed. During the production process, by changing the inclination angle of the rotary cooler 4, the residence time of the material, the heat exchange effect and the cooling uniformity can be adjusted. Specifically, the larger the inclination angle, the longer the residence time of the material in the cooler 4 will be, and the better the heat exchange effect will be; the smaller the inclination angle, the faster the flow rate of the material and the better the cooling uniformity. However, it should be noted that when selecting the inclination angle of the rotary cooler 4, it is also necessary to consider factors such as specific process requirements and equipment performance. If the inclination angle is too large or too small, it may have an adverse effect on the system, such as affecting the cooling effect and increasing the difficulty of equipment maintenance. Therefore, a comprehensive analysis should be conducted based on the specific situation to reasonably select the inclination angle.

[0066] In some embodiments, the rotary cooling subsystem also includes a cooling water recovery device 43 disposed below the cooler 4, which is used to recover cooling water used for heat exchange on the cylinder surface of the cooler 4. The cylinder of the cooler 4 is used to perform heat exchange on the clay material so as to cool the clay material. The rotary cooling subsystem also includes a sealing cover disposed above the cooler 4, which is used to collect and condense water vapor and collect the condensed water to the cooling water recovery device 43 or the raw water system that directly supplies water to the water spraying device.

[0067] Water is sprayed on the surface of the cooler 4, and some liquid water in the high-temperature section will be evaporated into water vapor, and most of the liquid water will flow into the water tank of the cooling water recovery device 43 set at the lower part of the rotor, and after recovery and cooling, it will be recycled. The evaporated water vapor is also collected and condensed, and then re-enters the system for recycling. The cooling water recovery device 43 and the sealing cover can effectively recycle the used cooling water and improve the utilization efficiency of water resources. In this way, through the sealing cover and the condensed water recovery device, water resources can be effectively recovered, and the energy efficiency and environmental protection performance of the entire calcination system can be improved.

[0068] In some embodiments, the cooler 4 is provided with the first water spray device 41 at the inlet and outlet ends of the material, the inlet and outlet ends of the cooler 4 are fixed, the middle part of the cooler 4 is a rotatable rotating section 403, and the connection between the rotating section 403 and the inlet and outlet ends is a sealed connection; the cooler 4 is provided with a second water spray device 42 on the outside of the shell, and the second water spray device 42 includes different nozzles arranged from the high temperature zone to the low temperature zone, which is used to cool the outside.

[0069] The high-temperature material after calcination enters the cooler 4. The inlet and outlet ends of the cooler 4 are fixed and sealed with the rotating part. There are water spraying points at the head and tail of the cooler 4. After high-temperature evaporation, water vapor is formed, so that the cooler 4 is slightly positively pressurized, isolating the outside air from entering the interior, and ensuring that the material is not oxidized and discolored during the cooling process. The cooling of the material mainly relies on water spraying on the cylinder, and the material exchanges heat with the cooling water on the surface of the cylinder through the shell of the cooler 4.

[0070] First, the high-temperature material is inside the cooler 4, and the heat is transferred to the outside through the heat transfer of the shell. The outside of the shell is provided with nozzles of different data from the high temperature zone to the low temperature zone to cool the shell, thereby finally achieving the purpose of cooling the material. At the same time, in order to prevent air from entering the rotary cooler 4, water spray devices are provided at the inlet and outlet parts. The vaporized water vapor generates positive pressure, which can prevent external air from entering the inside.

[0071] The rotary cooler 4 is generally composed of a rotating cylinder and a shell. The material enters the cooler 4 from the feed port and moves slowly with the rotation of the cylinder. The cooling water is sprayed on the shell of the cooler 4 through the spray system to form a water mist or water film to exchange heat with the rotating material surface.

[0072] The first water spray device 41 for directly spraying cooling water onto the material is arranged inside the shell of the cooler 4 of the embodiment of the present invention. After high-temperature evaporation, water vapor is formed, so that the cooler 4 is slightly positively pressurized, and the external air is isolated from entering the interior, so as to ensure that the material is not oxidized and discolored during the cooling process. The second water spray device 42 is arranged outside the shell of the cooler 4 of the embodiment of the present invention. The material exchanges heat with the cooling water on the surface of the cylinder through the cooler 4 shell to achieve the purpose of rapid cooling. The cooling water absorbs heat by contacting with the cooler 4 shell, thereby reducing the temperature of the cooler 4. This can help control the temperature in the cooler 4 and prevent overheating from causing equipment damage. The material in the rotating cooler 4 cylinder contacts the cooling water outside the cooler 4 shell, so that the surface of the material quickly dissipates heat, thereby reducing the temperature of the material. This helps prevent the material from overheating and protects the quality and stability of the material. When the material rotates in the cooler 4, adhesion may occur. The water film formed on the cooler 4 shell by spraying cooling water can play a wetting and separation role, prevent the material from adhering to the shell, and reduce the workload of equipment maintenance and cleaning.

[0073] The above implementation can achieve the advantages of the clay mineral suspension calcination process while using a rotary cooler to reduce the pressure loss of the entire system, while reducing the heat consumption of the system. The structural height of the entire preheating calcination system is greatly reduced. The color control advantage of the rotary cooler can also be used to achieve the purpose of finished product control, so that the entire system is perfectly combined to achieve the best.

[0074] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clay calcined color control system, It is characterized in that The system comprises a suspension calcination subsystem and a rotary cooling subsystem, wherein the suspension calcination subsystem is used for preheating, calcining, decomposing and separating the clay material, and the rotary cooling subsystem is used for cooling the calcined and decomposed clay material; The rotary cooling subsystem comprises a rotatably arranged cooler (4), wherein the cooler (4) is provided with a first water spraying device (41) at both the inlet and outlet ends of the material, for spraying cooling water, so that the cooling water is vaporized to generate water vapor and fills the inlet or outlet, thereby isolating the air exchange inside and outside the cooler (4), preventing the clay material from being oxidized and discolored during the cooling process, so as to achieve color control of the finished clay; The inlet and outlet ends of the cooler (4) are fixedly arranged, the middle part of the cooler (4) is a rotatable rotating section (403), and the connection between the rotatable section (403) and the inlet and outlet ends is a sealed connection; From the feed end (401) to the discharge end (402) of the cooler (4), the cooler (4) is arranged to be tilted downward.

2. The clay calcined color control system according to claim 1, It is characterized in that The inclination angle of the cooler (4) is 0-6°.

3. The clay calcined color control system according to claim 1, It is characterized in that The rotary cooling subsystem further comprises a cooling water recovery device (43) arranged below the cooler (4), for recovering cooling water used for heat exchange on the surface of the cylinder of the cooler (4), wherein the cylinder of the cooler (4) is used for heat exchange on the clay material, so that the clay material is cooled; The rotary cooling subsystem also includes a sealing cover arranged above the cooler (4) for collecting and condensing water vapor and collecting condensed water to the cooling water recovery device (43) or a raw water system that directly supplies water to the water spraying device.

4. The clay calcined color control system according to claim 1 or 3, It is characterized in that The cooler (4) is provided with a second water spray device (42) outside the shell, and the second water spray device (42) includes different spray heads arranged from the high temperature zone to the low temperature zone, and is used to cool the outside.

5. The clay calcined color control system according to claim 1, It is characterized in that The temperature of the clay material at the inlet end of the cooler (4) is configured to be 800 degrees, the temperature of the clay material in the first cooling section of the cooler (4) is configured to be no higher than 300 degrees, and the temperature of the clay material at the outlet end of the cooler (4) is configured to be no higher than 150 degrees, and is transported away by a conveying device.

6. The clay calcined color control system according to claim 1, It is characterized in that The suspension calcination subsystem comprises a preheating device (1) for preheating the clay material; The preheating device (1) comprises a first-stage preheating cyclone barrel (11) and a second-stage preheating cyclone barrel (12), wherein the first-stage preheating cyclone barrel (11) is located above the second-stage preheating cyclone barrel (12), and the first-stage preheating cyclone barrel (11) and the second-stage preheating cyclone barrel (12) are connected via an upward feeding pipe (13) and a downward feeding pipe (14); The first-stage preheating cyclone (11) is provided with at least one, which has a first upper feeding area (111) and a first lower discharging area (112); the second-stage preheating cyclone (12) is provided with at least one, which has a second upper feeding area (121) and a second lower discharging area (122); the first upper feeding area (111) of the first-stage preheating cyclone (11) is connected to the second upper feeding area (121) of the second-stage preheating cyclone (12) through the upward feeding pipe (13); the first lower feeding area of ​​the first-stage preheating cyclone (11) is connected to the second upper feeding area (121) of the second-stage preheating cyclone (12) through the downward feeding pipe (14); The upward feeding pipeline (13) is provided with a feeding port or is connected to a feeding device (6).

7. The clay calcined color control system according to claim 6, It is characterized in that The suspension calcination subsystem further comprises a decomposition device (2), which is arranged below the preheating device (1) and is connected directly or through a pipeline to the second lower discharge area (122) of the second-stage preheating cyclone (12), and is used for calcining and decomposing the preheated clay material; The decomposition device (2) comprises a decomposition furnace, the bottom of which is connected to the second lower discharge area (122) of the second-stage preheating cyclone (12) via a pipeline, and the top of the decomposition furnace is provided with a material outlet.

8. The clay calcined color control system according to claim 7, It is characterized in that The suspension calcination subsystem further comprises a hot air furnace device (5) for providing heat to the decomposition device (2); The hot blast furnace device (5) is provided with an oxygen content control mechanism for controlling the oxygen content of the outlet hot blast gas, thereby controlling the process atmosphere of calcining the clay in the decomposition device (2); The fuel inlet of the hot blast furnace device (5) comprises: a first fuel port (51) for inputting natural gas, a second fuel port (52) for inputting petroleum coke or waste oil, and a third fuel port (53) for inputting industrial waste; The lower part of the hot blast furnace device (5) is provided with a stepped grate plate (54) for providing combustion-assisting air for the combustion of large pieces of garbage and collecting ashes after combustion.

9. The clay calcined color control system according to claim 8, It is characterized in that The suspension calcination subsystem further comprises a separation device (3), wherein the separation device (3) is connected to the decomposition device (2) and is used to separate the clay material and the gas after calcination and decomposition; The separation device (3) is also connected to the inlet end of the cooler (4) of the rotary cooling subsystem via a pipeline.

10. The clay calcined color control system according to claim 9, It is characterized in that The suspension calcination subsystem further comprises a dust collector (7), which is connected to the first upper feed zone (111) at the top of the first-stage preheating cyclone (11) and is used for removing dust from the flue gas.

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