Architectural ceramic wetting pulverizing kiln tail mesh belt drying machine

Abstract

The mesh belt dryer comprises a mesh belt dryer body, the mesh belt dryer body comprises a feeding port, a feeding hopper is installed at the feeding port, the bottom of the feeding hopper is communicated with a distributing device, a discharging port is formed in the bottom of any side of the mesh belt dryer body, and a collecting hopper is installed at the end, close to the discharging port, of a bearing mesh belt. The top of the mesh belt dryer is provided with a moisture discharge port, the mesh belt dryer is supported on the kiln through a plurality of supports, a plurality of roller bars transversely penetrate through the middle of the kiln, the kiln is provided with a strong cold air pipe assembly, a gate plate is arranged on a kiln top plate, the kiln is communicated with the mesh belt dryer through the gate plate, the kiln is provided with a plurality of air blowers, and the top of the kiln is provided with a heat extraction port. The kiln in the kiln tail heat extraction section is communicated with the mesh belt dryer through a heat extraction opening, and supporting legs are installed at the bottom of the kiln. The waste heat is utilized under the condition that normal production of the kiln is not affected, the complex structure when the kiln and the mesh belt dryer exist independently is simplified, investment on equipment is saved, and the waste heat utilization effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of production and processing of building ceramics, and in particular relates to a mesh belt drying machine at the tail of a building ceramic wet powder making kiln. Background Art

[0002] Due to the high energy consumption, high pollution and high emission of wet production technology for building ceramics, the powder production process has been burning coal, which has caused serious pollution. In recent years, the emerging dry powder production technology for building ceramics has been expected to be widely adopted and promoted in the building ceramics industry. Unfortunately, its actual production effect cannot achieve the effect of wet powder production. In addition, the raw materials in the humid southern regions are generally wet and cannot be directly used, so there has been no successful application case in the industry so far.

[0003] After long-term research on dry powder making, it is found that the key points of the existing wet powder making and dry powder making processes are all in the powder particle forming link. Only the powder that can be pulverized during the first light pressing of the press can ensure the normal production of ceramics, otherwise there will be production problems. The hollow particles produced by high-temperature drying of mud droplets in wet powder making can meet this requirement through the aging and digestion of the powder shell, so that ceramic wet powder making has been widely used. The existing dry powder making is to form particles by bonding dry fine powder with water droplets. It is impossible to drain the water inside the particles by aging. At the same time, the external drainage causes the fine powder to peel off. It cannot be pulverized during the first light pressing of the press, which makes the subsequent production links have production and quality problems, resulting in the dry powder production unable to achieve the effect of wet powder making. For this reason, in order to meet the forming conditions of ceramic production, the wet powder making that cancels granulation and directly wets the fine powder has been summarized. Wet pulverizing is an upgrade of dry pulverizing and a replacement of wet pulverizing. It not only solves the production stability problem of the existing dry pulverizing, but also meets the needs of solving the three high problems of wet pulverizing. It is bound to become a practical and advanced technology in the building ceramics industry in the future.

[0004] The basis of wet milling of building ceramics is to obtain dry fine powder for wet production, and dry fine powder can be obtained by using the existing dry mill grinding method; it can also be achieved by filtering, drying and crushing after grinding in the existing wet mill. The existing dry mill grinding has high requirements for the moisture content of the raw powder entering the mill, and the moisture content generally does not exceed 2%. If the moisture content entering the vertical mill is high, additional heating and hot air drying of the raw materials are required. The reason why the existing wet milling is high in energy consumption, high in pollution and high in emissions is that the slurry with a moisture content of about 40% ground by the ball mill is evaporated at high temperature in the spray drying tower to reduce the moisture content by about 33% to form a powder with a moisture content of about 7%. In this process, the industry currently generally uses coal to solve the heat source problem. The fuel consumption in the milling process accounts for 40% of the entire ceramic production process. In the dry production process, due to the different moisture content of each raw material in the formula, when the heating furnace is used to supply heat to the vertical mill, it is not possible to achieve synchronous dehumidification of all the raw materials in the mill, and the uniformity of the grinding will be discontinuous, resulting in distortion of the formula and affecting the stability of subsequent production. In particular, the mud used in the humid areas of the south has a moisture content of about 25%, which cannot be directly put into the mill for grinding production, and it is impossible to use the dry production process technology to produce building ceramic products. For this reason, drying each raw material into a qualified raw material with a moisture content of less than 2% has become the key to the production of building ceramic vertical mills. For the drying of the filter mud with a moisture content of about 20% after ball milling in the wet process, a large-capacity drying equipment such as a mesh belt dryer is more needed. If the heat source of the mesh belt dryer is still heated by coal and natural gas, the significance of upgrading the process technology will be lost. Only by making full use of the waste heat from the cooling of the ceramic production kiln can the significance of practical and advanced process technology for energy saving and emission reduction of wet milling be realized.

[0005] Building ceramic products usually need to be fired at a high temperature of about 1180℃ in a kiln. After reaching the high temperature firing process, ceramic products need to immediately enter the cooling stage, which includes rapid cooling, slow cooling, forced cooling, heat extraction at the kiln tail, and natural cooling. During this period, a large amount of waste heat generated by cooling can be used, but currently only part of the waste heat is transported to the dryer for use, and most of it is discharged and wasted. Summary of the invention

[0006] The purpose of the present invention is to provide a mesh belt dryer at the end of a kiln for wet milling of building ceramics to solve the problems existing in the above-mentioned prior art.

[0007] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention provides a mesh belt dryer at the tail of a building ceramic wet powder making kiln, including a mesh belt dryer, the mesh belt dryer including a feed port, the feed port is located at the top of either side of the mesh belt dryer, a feed hopper is installed at the feed port, a distributor is connected to the bottom of the feed hopper, the mesh belt dryer also includes a plurality of bearing mesh belt groups, the bearing mesh belt groups are configured with a plurality of layers, each layer is composed of a plurality of sections of bearing mesh belts, the bearing mesh belt at the top near the feed port is gap-matched with the distribution end of the distributor, a discharge port is provided at the bottom of either side of the mesh belt dryer, a collecting hopper is installed at the end of the bearing mesh belt near the discharge port, a plurality of moisture discharge ports are provided at the top of the mesh belt dryer, and the mesh belt dryer is supported on the kiln by a plurality of brackets. , the kiln and the mesh belt dryer are gap-matched; a number of rollers cross the middle of the kiln, and the kiln includes a forced cooling zone and a heat extraction zone at the kiln tail section. The kiln in the forced cooling section is provided with a forced cooling air duct assembly, and the forced cooling air duct assembly is detachably connected to the kiln in the forced cooling zone, and a number of gates are provided on the furnace top plate of the forced cooling section. The kiln in the forced cooling section is connected to the mesh belt dryer through the gates, and a number of blowers are installed on the kiln in the heat extraction section at the kiln tail. The blowers are detachably connected to the kiln in the heat extraction section at the kiln tail, and a heat extraction port is opened on the top of the kiln in the heat extraction section at the kiln tail, and the kiln in the heat extraction section at the kiln tail is connected to the mesh belt dryer through the heat extraction port, and a number of legs are installed at the bottom of the kiln.

[0008] Preferably, the forced cooling air duct assembly is supplied with air by a forced cooling blower, and the forced cooling air duct assembly includes a forced cooling down air duct and a forced cooling up air duct, the forced cooling down air duct is located below the roller bar, and the forced cooling up air duct is located above the roller bar, the forced cooling down air duct and the forced cooling up air duct are symmetrically arranged through the roller bar, the forced cooling down air duct includes a forced cooling main pipe, and the forced cooling main pipe is connected to a plurality of forced cooling branch pipes, the forced cooling branch pipes are located below the roller bar, and the plurality of forced cooling branch pipes extend into the kiln and are detachably connected to the kiln, and the forced cooling branch pipes are provided with air outlets.

[0009] Preferably, several of the bearing mesh belts are designed with a head-up, tail-pressing and material-returning design or a parallel upper and lower staggered material-guiding design in the mesh belt dryer, and each of the bearing mesh belts is driven by a drive shaft, and the drive shaft is driven by an adjustable speed motor.

[0010] Preferably, the number of layers of the carrying mesh belt group needs to be adjusted according to the humidity of the raw material powder. The raw material powder with higher humidity needs to increase the number of layers of the carrying mesh belt group, and the raw material powder with lower humidity can reduce the number of layers of the carrying mesh belt group. When the filter mud route is selected for dry production, the adjustment range of the number of layers of the carrying mesh belt group is 3 to 7 layers, and the mesh number of the carrying mesh belt is 60 meshes. When the raw material vertical mill route is selected for dry production, the adjustment range of the number of layers of the carrying mesh belt group is 2 to 4 layers, and the mesh number of the carrying mesh belt is 40 to 60 meshes.

[0011] Preferably, online moisture detectors are provided on the carrying mesh belts near the feed port and the discharge port.

[0012] Preferably, a natural gas pipe is installed at the bottom of the mesh belt dryer, and a plurality of natural gas burners are installed on the natural gas pipe. The combustion ends of the natural gas burners extend into the interior of the mesh belt dryer, and the natural gas burners are detachably connected to the mesh belt dryer.

[0013] Preferably, the gate plate includes a baffle plate, adjustment handles are fixedly connected to both ends of the baffle plate, a plurality of reinforcing ribs are installed on the baffle plate, the gate plate also includes a gate, the baffle plate and the gate are slidably connected, and the kiln in the forced cooling section is connected to the mesh belt dryer through the plurality of gates.

[0014] Preferably, the moisture outlet is located in the middle of the top of the mesh belt dryer, the moisture outlet is cylindrical in design, and an exhaust volume adjustment plate is installed on the moisture outlet.

[0015] Preferably, the several blowers installed on the kiln in the heat extraction section at the kiln tail are cylindrical blowers.

[0016] Preferably, the width of the supporting mesh belt is smaller than and / or equal to the inner width of the kiln.

[0017] The present invention discloses the following technical effects: 1. The present invention utilizes waste heat without affecting the normal production of the kiln, which not only simplifies the complex structure of the kiln and the mesh belt dryer when they exist independently, saves investment in equipment, but also improves the waste heat utilization effect.

[0018] 2. The present invention makes the kiln top and the mesh belt dryer directly connected in an open design, so that when the kiln discharges heat in the forced cooling area and the heat extraction area at the kiln tail, it avoids the problems of large ventilation resistance and poor effect of traditional pipelines, slow heat dissipation of ceramic products, and high kiln outlet temperature requiring a longer cooling platform.

[0019] 3. The present invention uses a mesh belt dryer, which does not require the independent heating system and centralized moisture removal system of the traditional mesh belt dryer, greatly reduces fuel consumption, reduces carbon emissions, and achieves the effect of clean and green production.

[0020] 4. The present invention can be used to dry raw materials in the northern region and filter mud in the humid southern region, which opens up the regional restrictions on the application of traditional dry pulverizing, meets the requirements of drying raw materials required by the wet pulverizing production process of building ceramics and drying raw materials with different moisture contents to achieve consistent moisture content, solves the problem of high energy consumption in drying raw materials with high moisture content in the humid southern region, and creates necessary conditions for the promotion and application of the wet pulverizing production process of building ceramics in the humid southern region. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 A schematic diagram of the present invention as a whole; Figure 2 is a schematic diagram of a kiln of the present invention; Figure 3 It is a schematic diagram of the mesh belt drying machine of the present invention; Figure 4 It is a schematic diagram of the interior of the drying machine of the present invention; Figure 5 is a schematic diagram of the interior of the kiln of the present invention; Figure 6 is a schematic diagram of the gate of the present invention; Figure 7 It is a schematic diagram of the strong cooling air duct assembly of the present invention.

[0022] In the figure: 1. kiln; 2. support legs; 3. rapid cooling zone; 4. slow cooling zone; 5. forced cooling zone; 6. heat extraction zone at the kiln tail; 7. heat extraction port; 8. furnace roof; 9. gate; 90. baffle; 91. adjustment handle; 92. reinforcing ribs; 93. gate; 10. roller; 11. forced cooling downwind duct; 110. forced cooling blower; 111. forced cooling main pipe; 112. forced cooling branch pipe; 113. air outlet; 12. forced cooling upwind duct; 13. cylindrical blower; 14. mesh belt dryer; 15. bracket; 16. moisture outlet; 17. feed hopper; 18. distributor; 19. load-bearing mesh belt; 20. drive shaft; 21. natural gas pipe; 22. natural gas burner; 23. collecting hopper. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0025] Reference Figure 1-Figure 7 As shown, the present embodiment provides a mesh belt dryer at the end of a building ceramic wet powder kiln, including a mesh belt dryer 14, the mesh belt dryer 14 including a feed port, the feed port is located at the top of either side of the mesh belt dryer 14, a feed hopper 17 is installed at the feed port, the bottom of the feed hopper 17 is connected to a distributor 18, the mesh belt dryer 14 also includes a plurality of bearing mesh belt groups, the bearing mesh belt group is configured with a plurality of layers, each layer is composed of a plurality of sections of bearing mesh belts 19, the bearing mesh belt 19 at the top near the feed port is in clearance with the distribution end of the distributor 18, a discharge port is provided at the bottom of either side of the mesh belt dryer 14, a collecting hopper 23 is installed at the end of the bearing mesh belt 19 near the discharge port, a plurality of moisture outlets 16 are provided at the top of the mesh belt dryer 14, and the mesh belt dryer 14 is supported on the kiln by a plurality of brackets 15 On the furnace 1, the kiln 1 and the mesh belt dryer 14 are gap-matched; a plurality of rollers 10 cross the middle of the kiln 1, and the kiln 1 includes a forced cooling zone 5 and a heat extraction zone 6 at the kiln tail section. The kiln 1 in the forced cooling zone 5 is provided with a forced cooling air duct assembly, and the forced cooling air duct assembly is detachably connected to the kiln 1 in the forced cooling zone 5. A plurality of gates 9 are provided on the furnace top plate 8 in the forced cooling zone 5. The kiln 1 in the forced cooling zone 5 is connected to the mesh belt dryer 14 through the plurality of gates 9. A plurality of blowers are installed on the kiln 1 in the heat extraction zone 6 at the kiln tail, and the blowers are detachably connected to the kiln 1 in the heat extraction zone 6 at the kiln tail. A heat extraction port 7 is opened on the top of the kiln 1 in the heat extraction zone 6 at the kiln tail, and the kiln 1 in the heat extraction zone 6 at the kiln tail is connected to the mesh belt dryer 14 through the heat extraction port 7. A plurality of legs 2 are installed at the bottom of the kiln 1.

[0026] The mesh belt dryer 14 is the most critical drying equipment for wet powder making, which is formed by the integrated design of the cooling section of the ceramic production kiln 1 and the mesh belt dryer 14. It is mainly used to dry the moisture of the raw materials entering the vertical mill or to dry the moisture after the mud filter of the ball mill. The required heat source is the waste heat discharged from the forced cooling zone 5 of the kiln 1 and the heat extraction zone 6 at the end of the kiln. When the kiln 1 expands due to heat or contracts due to cooling, its length will change. In order to avoid deformation between the mesh belt dryer 14 and the kiln 1, the mesh belt dryer 14 and the kiln 1 cannot be in hard contact. The mesh belt dryer 14 is suspended above the kiln 1 through the bracket 15, and is matched with the kiln 1. The gap between them is filled and sealed with temperature-resistant rock wool to prevent the internal heat from escaping. The operating temperature range of the mesh belt dryer 14 is 50°C to 500°C; when an odd number of bearing mesh belt layers are set, the feed port and the discharge port are distributed on both sides of the mesh belt dryer 14; when an even number of bearing mesh belt layers are set, the feed port and the discharge port are distributed on the same side of the mesh belt dryer 14; when the mesh belt dryer 14 is used, the raw materials are evenly arranged on the bearing mesh belt 19 from the feed hopper 17 through the distributor 18, and the bearing mesh belt 19 drives the raw materials to be dried in the drying chamber of the mesh belt dryer 14, and the dried raw materials are collected by the collecting hopper 23 at the end of the bearing mesh belt 19. The load-bearing mesh belt 19 is preferably a stainless steel mesh and sprayed with Teflon anti-stick coating. The dehumidification port 16 arranged at the center of the top of the mesh belt dryer 14 is used to discharge the water vapor volatilized from the raw materials. The dehumidification of the mesh belt dryer 14 at the end of the kiln is considered to be all pure waste heat from the cooling of the bricks, and no additional gas treatment is required. For this purpose, an appropriate large-diameter dehumidification pipe can be designed to discharge moisture directly. The number of dehumidification ports 16 is designed according to the exhaust volume, and can also be designed into multiple rows according to demand. The diameter and height of the dehumidification port 16 can be increased to accelerate dehumidification. According to the heating air volume in different areas of the kiln 1, a duct fan can be installed to discharge moisture. According to the cooling process requirements of the kiln 1, the extremely fast cooling zone 3 and the slow cooling zone 4 are the key points to ensure the output and quality of ceramic products during the production process, and no changes are made to this area. The gate plate 9 installed on the top of the forced cooling zone 5 is used to adjust the heat supply of the forced cooling zone 5. Rapid cooling zone: The first half of kiln 1 firing ceramic products is the firing heating zone. After heating to the highest temperature, the heating is stopped in the rapid cooling zone. A large amount of cold air is blown above and below the product on the roller 10 to rapidly cool the ceramic products to shape them. The temperature drop can reach about 600°C. This area is not equipped with heat extraction. Slow cooling zone 4: After the kiln 1 fires ceramic products and is rapidly cooled, the temperature drops to the phase change point area. Sufficient time is required for the ceramic products to undergo a phase change and enter the stabilizer. The temperature enters the slow drop zone. As the product's hot body phase changes and releases heat, cold air needs to be input for temperature exchange. This area is a key area for quality control of ceramic products. In order to stabilize production, the waste heat in this area is not temporarily used for the mesh belt dryer 14, but continues to be used for the dryer.Forced cooling zone 5: After the kiln 1 fires ceramic products and slowly cools them, the temperature is about 400°C and the phase change process requirements have been met. Forced rapid cooling can be performed at this stage. For this purpose, a forced cooling duct assembly is installed on the kiln 1 to blow air to this zone. The heat generated in this zone can be used by the mesh belt dryer 14. When the mesh belt dryer 14 is not configured in this zone, an exhaust hood is provided on the top of each section of the kiln 1 in this zone. The waste heat is extracted by blast cooling, and the same exhaust main duct is used to induce air as the slow cooling zone 4. When the mesh belt dryer 14 is configured in this zone, it is necessary to block the exhaust main duct, remove the exhaust hood, install the longitudinal gate 9, directly connect the heating chamber of the mesh belt dryer 14, and move the forced cooling blower 110 configured on the top to the side of the transmission side of the kiln 1, thereby completing the design requirements of integration with the mesh belt dryer 14. Heat extraction zone 6 at the end of the kiln: After the kiln 1 fires the product and undergoes forced cooling, the temperature of the ceramic product body has been greatly reduced, generally below 200°C. Originally, a blower was installed under the roller 10 to further cool the ceramic product, and the exhaust hood was used to exhaust heat. Now, after configuring the mesh belt dryer 14, a blower is installed under the roller 10 of each box in this area to blow air into the kiln for heat exchange to generate waste heat, and the top of the kiln 1 in this area is completely removed to form a heat extraction port 7, which directly connects this area with the mesh belt dryer 14, so that the waste heat generated can be more fully utilized, and the ceramic raw materials and compressed mud can be better dried. The forced cooling zone 5 and the heat extraction zone 6 at the end of the kiln are the sections where the product needs to quickly exhaust heat. At this time, the heat in the section is supplied to the mesh belt dryer 14 through the forced cooling air duct assembly and the blower, so that the waste heat of the cooling of the kiln 1 is fully utilized, the heat loss of the traditional long-distance pipeline is prevented, and the overall investment in the equipment is reduced.

[0027] Further, the forced cooling air duct assembly is supplied with air by the forced cooling blower 110, and the forced cooling air duct assembly includes a forced cooling down air duct 11 and a forced cooling up air duct 12. The forced cooling down air duct 11 is located below the roller 10, and the forced cooling up air duct 12 is located above the roller 10. The forced cooling down air duct 11 and the forced cooling up air duct 12 are symmetrically arranged through the roller 10. The forced cooling down air duct 11 includes a forced cooling main pipe 111, and the forced cooling main pipe 111 is connected to a plurality of forced cooling branch pipes 112. The forced cooling branch pipes 112 are located below the roller 10, and the plurality of forced cooling branch pipes 112 extend into the kiln 1 and are detachably connected to the kiln 1. An air outlet 113 is provided on the forced cooling branch pipes 112.

[0028] The forced cooling air duct assembly cancels the original air supply mode of a fan set on the top of the kiln 1, and changes it to an independent blower on the active side of the kiln 1 roller 10 to supply air, or two blowers supply air to the forced cooling upper air duct 12 and the forced cooling lower air duct 11 respectively. The configuration of the forced cooling upper air duct 12 and the forced cooling lower air duct 11 are the same except that the direction of the air outlet 113 on the forced cooling branch pipe 112 is different. The air outlet 113 of the forced cooling branch pipe 112 on the forced cooling upper air duct 12 is downward, toward the top surface of the ceramic product on the roller 10; the air outlet 113 of the forced cooling branch pipe 112 on the forced cooling lower air duct 11 is upward, toward the bottom surface of the ceramic product on the roller 10. The strong cooling air duct assembly is preferably arranged on the active side of the roller 10 of the kiln 1 to facilitate subsequent maintenance. The strong cooling air duct assembly can be arranged at the upper and lower positions of the roller 10 of the kiln 1 in this area, or the strong cooling upper air duct 12 can be arranged inside the kiln 1, and the strong cooling lower air duct 11 can be arranged at the bottom of the inner side of the kiln 1, so as not to affect the extraction and replacement of the roller 10.

[0029] Furthermore, a plurality of supporting mesh belts 19 are designed to reverse the material by raising their heads and pressing their tails, or to conduct the material in parallel with the upper and lower staggered heights, in the mesh belt dryer 14. Each supporting mesh belt 19 is driven by a driving shaft 20, and the driving shaft 20 is driven by an adjustable speed motor.

[0030] Taking into account the large amount of raw materials that need to be dried by the mesh belt dryer 14, it is set up for multi-belt transmission. Each carrying mesh belt 19 is driven by a drive shaft 20, and the drive shaft 20 is driven by a speed regulating motor. The speed regulating motor can adjust the running speed and running direction of the carrying mesh belt 19. Taking into account that the moisture content of raw materials in different regions is relatively high, it is necessary to implement a variable speed design for the carrying mesh belt 19 to meet the different requirements of different raw materials for drying time, so that the moisture content of the raw materials can be controlled more accurately.

[0031] Furthermore, the number of layers of the carrying mesh belt group needs to be adjusted according to the humidity of the raw material powder. The raw material powder with higher humidity requires increasing the number of layers of the carrying mesh belt group, while the raw material powder with lower humidity can reduce the number of layers of the carrying mesh belt group. When the filter mud route is selected for dry production, the adjustment range of the number of layers of the carrying mesh belt group is 3 to 7 layers, and the mesh number of the carrying mesh belt 19 is 60 meshes. When the raw material vertical mill route is selected for dry production, the adjustment range of the number of layers of the carrying mesh belt group is 2 to 4 layers, and the mesh number of the carrying mesh belt 19 is 40 to 60 meshes.

[0032] The carrying mesh belt 19 needs to carry the raw materials during operation. Considering that the raw materials contain fine powder, a 40-60 mesh stainless steel screen is selected as the carrying mesh belt 19 to prevent the carrying mesh belt 19 from leaking powder. The water content of the raw materials is different and the demand for raw materials is different. The number of layers of the carrying mesh belt group needs to be designed according to the specific water content demand and the demand for the type of raw materials.

[0033] Furthermore, online moisture detectors are provided on the carrying mesh belts 19 near the feed port and the discharge port.

[0034] The online moisture detector is used to detect the moisture content of the incoming and outgoing raw materials. When the moisture content of the incoming or outgoing raw materials is detected to be high, the transport speed of the carrier mesh belt 19 is reduced to ensure that the raw materials meet the standards required for subsequent processing; when the moisture content of the incoming or outgoing raw materials is detected to be low, the transport speed of the carrier mesh belt 19 is increased to improve the efficiency of raw material drying. The online moisture detector is electrically connected to the main control. The main control can adjust the operating speed of the carrier mesh belt 19 according to the data fed back by the online moisture detector, realizing the automated and intelligent operation of raw material drying.

[0035] Furthermore, a natural gas pipe 21 is installed at the bottom of the mesh belt dryer 14, and a plurality of natural gas burners 22 are installed on the natural gas pipe 21. The combustion ends of the natural gas burners 22 extend into the mesh belt dryer 14, and the natural gas burners 22 are detachably connected to the mesh belt dryer 14.

[0036] The kiln 1 has little or no waste heat during the production start-up phase. When the mesh belt dryer 14 needs to start drying the raw materials, the natural gas burner 22 is started to burn and supply heat to the mesh belt dryer 14 for drying the raw materials. When the kiln 1 can provide the heat required by the mesh belt dryer 14, the natural gas is interrupted so that the natural gas burner 22 no longer burns and supplies heat.

[0037] Furthermore, the gate plate 9 includes a baffle 90, with adjustment handles 91 fixedly connected at both ends of the baffle 90, a plurality of reinforcing ribs 92 installed on the baffle 90, and the gate plate 9 also includes a gate 93, the baffle 90 and the gate 93 are slidably connected, and the kiln 1 in the forced cooling zone 5 is connected to the mesh belt dryer 14 through the plurality of gates 93.

[0038] By adjusting the adjustment handle 91 of the baffle 90, the heating supply of the mesh belt dryer 14 in the forced cooling zone 5 can be adjusted, which can play a great role in both the firing protection of ceramic products and the heating supply adjustment of the mesh belt dryer 14.

[0039] Specifically, the moisture outlet 16 is located at the middle of the top of the mesh belt dryer 14 . The moisture outlet 16 is cylindrical in design and an exhaust volume regulating plate is installed on the moisture outlet 16 .

[0040] The exhaust volume adjustment plate on the tide outlet 16 is used to adjust the exhaust volume of the tide outlet 16, and the exhaust volume of the tide outlet 16 is adjusted according to actual production needs.

[0041] Furthermore, the blowers installed on the kiln 1 in the kiln tail heat extraction zone 6 are cylindrical blowers 13.

[0042] The Yuantong blower is installed below the 6 rollers 10 in the heat extraction area at the end of the kiln. By blowing air directly to the bottom of the ceramic products, the heat of the ceramic products can reach the inside of the dryer for drying the raw materials.

[0043] Furthermore, the width of the supporting mesh belt 19 is smaller than and / or equal to the inner width of the kiln 1 .

[0044] The width of the carrying mesh belt 19 should not exceed the inner width of the kiln 1 in principle, and can be adjusted according to the actual moisture content of the raw materials, the load-bearing weight of the carrying mesh belt 19, the required moisture content of the raw materials, on-site construction and other required working conditions.

[0045] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A mesh belt dryer at the end of a kiln for wet milling of building ceramics, comprising a mesh belt dryer (14), characterized in that: The mesh belt dryer (14) comprises a feed inlet, the feed inlet being located at the top of either side of the mesh belt dryer (14), a feed hopper (17) being installed at the feed inlet, the bottom of the feed hopper (17) being connected to a distributor (18), the mesh belt dryer (14) further comprising a plurality of bearing mesh belt groups, the bearing mesh belt groups being configured with a plurality of layers, each layer being composed of a plurality of sections of bearing mesh belts (19), the bearing mesh belt (19) at the top closest to the feed inlet being connected to the distributor ( 18) The cloth end is gap-matched, a discharge port is provided at the bottom of either side of the mesh belt dryer (14), a collecting hopper (23) is installed at the end of the supporting mesh belt (19) near the discharge port, a plurality of moisture discharge ports (16) are provided at the top of the mesh belt dryer (14), the mesh belt dryer (14) is supported on the kiln (1) by a plurality of brackets (15), and the kiln (1) and the mesh belt dryer (14) are gap-matched; a plurality of rollers are horizontally passed through the middle of the kiln (1). The kiln (1) comprises a forced cooling zone (5) and a heat extraction zone (6) at the kiln tail section, the kiln (1) in the forced cooling zone (5) is provided with a forced cooling air duct assembly, the forced cooling air duct assembly is detachably connected to the kiln (1) in the forced cooling zone (5), a plurality of gates (9) are provided on the furnace top plate (8) in the forced cooling zone (5), the kiln (1) in the forced cooling zone (5) is connected to the mesh belt drying machine through the plurality of gates (9). The kiln (1) is connected to a mesh belt dryer (14), a plurality of blowers are installed on the kiln (1) in the kiln tail heat extraction zone (6), and the blowers are detachably connected to the kiln (1) in the kiln tail heat extraction zone (6), a heat extraction port (7) is opened on the top of the kiln (1) in the kiln tail heat extraction zone (6), and the kiln (1) in the kiln tail heat extraction zone (6) is connected to the mesh belt dryer (14) through the heat extraction port (7), and a plurality of legs (2) are installed at the bottom of the kiln (1).

2. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 1, characterized in that: The forced cooling air duct assembly is supplied with air by a forced cooling blower (110). The forced cooling air duct assembly comprises a forced cooling down air duct (11) and a forced cooling up air duct (12). The forced cooling down air duct (11) is located below the roller (10), and the forced cooling up air duct (12) is located above the roller (10). The forced cooling down air duct (11) and the forced cooling up air duct (12) are symmetrically arranged through the roller (10). The forced cooling down air duct (11) comprises a forced cooling main pipe (111). The forced cooling main pipe (111) is connected to a plurality of forced cooling branch pipes (112). The forced cooling branch pipes (112) are located below the roller (10). The plurality of forced cooling branch pipes (112) extend into the kiln (1) and are detachably connected to the kiln (1). An air outlet (113) is provided on the forced cooling branch pipe (112).

3. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 1 is characterized by: A plurality of the bearing mesh belts (19) are designed to raise their heads, press their tails and reverse the materials, or to be designed to guide materials in parallel with the upper and lower staggered heights, in the mesh belt dryer (14). Each of the bearing mesh belts (19) is driven by a drive shaft (20), and the drive shaft (20) is driven by an adjustable speed motor.

4. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 3 is characterized by: The number of layers of the bearing mesh belt group needs to be adjusted according to the humidity of the raw material powder. The raw material powder with higher humidity needs to increase the number of layers of the bearing mesh belt group, while the raw material powder with lower humidity can reduce the number of layers of the bearing mesh belt group. When the filter mud route is selected for dry production, the adjustment range of the number of layers of the bearing mesh belt group is 3 to 7 layers, and the mesh number of the bearing mesh belt (19) is 60 meshes. When the raw material vertical mill route is selected for dry production, the adjustment range of the number of layers of the bearing mesh belt group is 2 to 4 layers, and the mesh number of the bearing mesh belt (19) is 40 to 60 meshes.

5. The kiln tail net belt dryer for wet milling of building ceramics according to claim 1 is characterized by: An online moisture detector is provided on the carrying mesh belt (19) near the feed port and the discharge port.

6. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 1, characterized in that: A natural gas pipe (21) is installed at the bottom of the mesh belt dryer (14), and a plurality of natural gas burners (22) are installed on the natural gas pipe (21). The combustion ends of the natural gas burners (22) extend into the interior of the mesh belt dryer (14), and the natural gas burners (22) are detachably connected to the mesh belt dryer (14).

7. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 1, characterized in that: The gate plate (9) comprises a baffle (90), and adjustment handles (91) are fixedly connected at both ends of the baffle plate (90). A plurality of reinforcing ribs (92) are installed on the baffle plate (90). The gate plate (9) further comprises a gate (93), and the baffle plate (90) and the gate (93) are slidably connected. The kiln (1) in the forced cooling zone (5) is connected to the mesh belt dryer (14) through the plurality of gates (93).

8. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 1, characterized in that: The moisture outlet (16) is located at the middle of the top end of the mesh belt dryer (14); the moisture outlet (16) is of cylindrical design; an exhaust volume adjustment plate is installed on the moisture outlet (16).

9. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 1, characterized in that: The plurality of blowers installed on the kiln (1) in the kiln tail heat extraction zone (6) are cylindrical blowers (13).

10. The kiln tail mesh belt dryer for wet milling of building ceramics according to claim 4, characterized in that: The width of the supporting mesh belt (19) is smaller than and / or equal to the inner width of the kiln (1).

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