CN215413164U - Sintering de-waxing kiln - Google Patents

Abstract

The utility model discloses a sintering wax removal kiln, which comprises a sintering furnace unit and a wax removal furnace unit arranged on the side of the sintering furnace unit, wherein the sintering furnace unit is communicated with the wax removal furnace unit and discharges high-temperature sintering waste heat to the wax removal furnace unit for wax removal, a natural gas combustion heating device for providing high sintering temperature is arranged on the sintering furnace unit, and a temperature control device for adjusting the temperature gradient in the furnace by controlling the discharge amount of the high-temperature air flow in the furnace to be sucked and discharged outwards is arranged on the sintering furnace unit and/or the wax removal furnace unit. The temperature gradient in the sintering furnace unit and/or the wax removal furnace unit can be monitored, adjusted and controlled in real time, so that the temperature gradient in the sintering process and/or the wax removal process is ensured to meet the product requirements, and the quality of the obtained ceramic product is ensured.

Description

Sintering de-waxing kiln

Technical Field

The utility model relates to the technical field of ceramic piece forming equipment, in particular to a sintering de-waxing kiln.

Background

The kiln is a device built by refractory materials for sintering products, and is a necessary facility in ceramic molding. In the novel electronic ceramic manufacturing process, the batch production of ceramic dewaxing and sintering needs the help of a kiln.

Most of the existing kilns adopt a single-channel single-row structure, and because the ceramic dewaxing and sintering process requirements are different and the temperature requirements are different, the existing kilns can only complete a single ceramic dewaxing or ceramic sintering process, the ceramic dewaxing process generates residual smoke which is directly discharged into space and pollutes the environment, the ceramic manufacturing process requirements are difficult to meet, the occupied area of the kilns is large, and the kilns special for dewaxing and special kilns for sintering are arranged at the same time only for the ceramic manufacturing process, so that the space waste is caused; and the energy can not be effectively utilized, which causes a great deal of energy waste.

On the other hand, the ceramic sintering or ceramic de-waxing process is a key step of the ceramic piece forming process, the temperature gradient of the ceramic sintering or ceramic de-waxing process plays a decisive role in the product quality, and once the temperature gradient is improperly controlled, the product quality can be directly caused to slide down and the defective rate is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a sintering de-waxing kiln, which aims to solve the technical problems that the existing ceramic sintering or de-waxing kiln occupies large space, consumes large energy, pollutes the environment and cannot ensure the quality of the obtained product.

According to one aspect of the utility model, a sintering wax removal kiln is provided, which comprises a sintering furnace unit and a wax removal furnace unit arranged at the side of the sintering furnace unit, wherein the sintering furnace unit is communicated to the wax removal furnace unit and discharges high-temperature sintering waste heat to the wax removal furnace unit for wax removal, a natural gas combustion heating device for providing high sintering temperature is arranged on the sintering furnace unit, and a temperature control device for adjusting the temperature gradient in the furnace by controlling the discharge amount of high-temperature air flow in the furnace to be sucked and discharged outwards is arranged on the sintering furnace unit and/or the wax removal furnace unit.

Furthermore, a sintering preheating zone, a high-temperature sintering zone, a sintering heat preservation zone and a sintering cooling zone are sequentially distributed in the inner cavity of the sintering furnace unit from the feeding hole to the discharging hole; the inner cavity of the dewaxing furnace unit is sequentially provided with a dewaxing preheating zone, a dewaxing self-combustion zone, a high-temperature dewaxing burning zone, a dewaxing heat preservation zone and a dewaxing cooling zone from the feeding hole to the discharging hole; the air flow output end of the high-temperature sintering area is communicated with the high-temperature de-waxing and burning area, and/or the air flow input end of the sintering heat preservation area is communicated with the high-temperature de-waxing and burning area, and/or the air flow output end of the sintering heat preservation area is communicated with the de-waxing and heat preservation area.

Further, natural gas burning heating device includes natural gas spray gun and heat transfer coil, heat transfer coil lays in sintering heat preservation district and/or sintering cooling district, and heat transfer coil's air current import communicates to sintering heat preservation district and/or sintering cooling district, heat transfer coil's air current export communicates to the air connector of natural gas spray gun through the air intake pipe, the natural gas connector of natural gas spray gun communicates to the natural gas pipeline through the natural gas intake pipe, the output of natural gas spray gun lets in to the high temperature sintering district in order to be the heat supply of high temperature sintering district through burning the natural gas.

Furthermore, the temperature control device comprises a temperature sensor, an exhaust pipe, an exhaust fan and a temperature controller, wherein the temperature sensor is arranged at least one of the sintering preheating zone, the high-temperature sintering zone, the sintering heat preservation zone and the sintering cooling zone, the exhaust fan is assembled on the exhaust pipe, and the exhaust pipe is assembled in the high-temperature sintering zone and/or the sintering heat preservation zone so as to lead out high-temperature airflow in the high-temperature sintering zone and/or the sintering heat preservation zone to the outside; the temperature sensor is used for sensing the temperature change of each area of the sintering furnace unit so as to obtain the actual temperature gradient of the whole sintering furnace unit, and the temperature controller is used for comparing the actual temperature gradient of the sintering furnace unit with the preset temperature gradient of the sintering furnace unit and controlling the operation of the exhaust fan, so that the actual temperature gradient of the sintering furnace unit is close to the preset temperature gradient of the sintering furnace unit.

Furthermore, the temperature control device comprises a temperature sensor, an exhaust pipe, an exhaust fan and a temperature controller, wherein the temperature sensor is arranged at least one of the wax removal preheating zone, the wax removal self-burning zone, the high-temperature wax removal burning zone, the wax removal heat preservation zone and the wax removal cooling zone, the exhaust fan is assembled on the exhaust pipe, and the exhaust pipe is assembled in the wax removal self-burning zone and/or the high-temperature wax removal burning zone so as to lead out high-temperature airflow in the wax removal self-burning zone and/or the high-temperature wax removal burning zone to the outside; the temperature sensor is used for sensing the temperature change of each area of the wax removal furnace unit so as to obtain the actual temperature gradient of the whole wax removal furnace unit, the temperature controller is used for comparing the actual temperature gradient of the wax removal furnace unit with the preset temperature gradient of the wax removal furnace unit and controlling the operation of the exhaust fan, and therefore the actual temperature gradient of the wax removal furnace unit is close to the preset temperature gradient of the wax removal furnace unit.

Furthermore, the output end of the natural gas spray gun is provided with a temperature-resistant plate which is adjustable along the vertical direction and is used for blocking heat in the region by utilizing the hot air flow rising principle so as to stabilize the temperature in the region.

Furthermore, the upper part of at least one of the sintering preheating zone and the high-temperature sintering zone, the high-temperature sintering zone and the sintering heat preservation zone and the sintering cooling zone is provided with a temperature-resistant plate for utilizing the hot air flow rising principle to resist heat in the zone so as to stabilize the temperature in the zone.

Furthermore, the upper part of at least one of the positions between the wax removal preheating zone and the wax removal self-combustion zone, between the wax removal self-combustion zone and the high-temperature wax removal burning zone, between the high-temperature wax removal burning zone and the wax removal heat preservation zone, and between the wax removal heat preservation zone and the wax removal cooling zone is provided with a temperature resistance plate for resisting heat in the zone by utilizing the hot air flow rising principle so as to stabilize the temperature in the zone.

Furthermore, a plurality of wax removal preheating units are formed in the wax removal preheating zone in a separated mode, and a temperature resistance plate for blocking heat in the zone by utilizing the hot air flow rising principle to stabilize the temperature in the zone is arranged at the upper part between every two adjacent wax removal preheating units; and the high-temperature dewaxing firing area and/or the dewaxing heat preservation area are/is provided with temperature adjusting pipes which are sequentially communicated with the dewaxing preheating units and used for supplying heat to the dewaxing preheating units respectively, the temperature adjusting pipes outside the dewaxing preheating units are provided with flow fans used for adjusting the flow of air flow introduced into the dewaxing preheating units, and the flow fans and the dewaxing preheating units are arranged in a one-to-one correspondence manner.

Furthermore, a cooling gas recovery pipe communicated with the sintering cooling area is arranged on the wax removal cooling area.

The utility model has the following beneficial effects:

according to the sintering de-waxing kiln disclosed by the utility model, the de-waxing kiln units are arranged in the lateral direction of the sintering kiln units to form a connected integral kiln, the integral heat preservation and insulation are reduced, and the space occupancy rate can be reduced compared with the existing split structure design; the heat required by the wax removal furnace unit is lower than that required by the sintering furnace unit, the communication design of the sintering furnace unit and the wax removal furnace unit is carried out by utilizing the temperature relation between the sintering furnace unit and the wax removal furnace unit, and the redundant heat in the sintering furnace unit is provided for the wax removal furnace unit for wax removal, so that the heat energy is fully utilized, compared with the existing split structure design, the integral energy consumption is lower, and the heat energy utilization rate is improved; the temperature control device is arranged on the sintering furnace unit and/or the wax removal furnace unit, so that the temperature rise gradient in the sintering furnace unit and/or the wax removal furnace unit can be monitored, adjusted and controlled in real time, the temperature rise gradient in the sintering process and/or the wax removal process is ensured to meet the product requirement, and the quality of the obtained ceramic product is ensured.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic top view of a sintering dewaxing furnace according to a preferred embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a sintering dewaxing furnace according to a preferred embodiment of the utility model;

FIG. 3 is a schematic longitudinal sectional structure of a sintering furnace unit according to a preferred embodiment of the present invention;

fig. 4 is a schematic longitudinal sectional view of a dewaxing furnace unit according to a preferred embodiment of the present invention.

Illustration of the drawings:

1. a sintering furnace unit; 101. a sintering preheating zone; 102. a high temperature sintering zone; 103. a sintering heat preservation area; 104. a sintering cooling zone; 2. a de-waxing furnace unit; 201. a de-waxing preheating zone; 2011. a de-waxing preheating unit; 202. a de-waxing self-burning zone; 203. a high-temperature de-waxing and firing zone; 204. a de-waxing heat-preserving area; 205. a de-waxing cooling zone; 206. a temperature regulating tube; 207. a flow fan; 3. a natural gas combustion heating device; 301. a natural gas spray gun; 302. a heat exchange coil; 303. an air inlet pipe; 304. a natural gas inlet pipe; 4. a temperature control device; 5. a temperature resistance plate; 6. cooling the gas recovery tube.

Detailed Description

The embodiments of the utility model will be described in detail below with reference to the accompanying drawings, but the utility model can be embodied in many different forms, which are defined and covered by the following description.

FIG. 1 is a schematic top view of a sintering dewaxing furnace according to a preferred embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of a sintering dewaxing furnace according to a preferred embodiment of the utility model; FIG. 3 is a schematic longitudinal sectional structure of a sintering furnace unit according to a preferred embodiment of the present invention; fig. 4 is a schematic longitudinal sectional view of a dewaxing furnace unit according to a preferred embodiment of the present invention.

As shown in fig. 1 and fig. 2, the sintering de-waxing kiln of the present embodiment includes a sintering furnace unit 1 and a de-waxing furnace unit 2 located at a side of the sintering furnace unit 1, the sintering furnace unit 1 is communicated to the de-waxing furnace unit 2 and discharges high-temperature sintering waste heat to the de-waxing furnace unit 2 for de-waxing, a natural gas combustion heating device 3 for providing high sintering temperature is disposed on the sintering furnace unit 1, and a temperature control device 4 for adjusting a temperature gradient in the furnace by controlling a discharge amount discharged by sucking high-temperature gas flow in the furnace outward is disposed on the sintering furnace unit 1 and/or the de-waxing furnace unit 2. According to the sintering de-waxing kiln disclosed by the utility model, the de-waxing kiln units 2 are arranged in the lateral direction of the sintering kiln units 1 to form a connected integral kiln, and the integral heat preservation and heat insulation are reduced, so that the space occupancy rate can be reduced compared with the existing split structure design; the heat required by the wax removal furnace unit 2 is lower than that required by the sintering furnace unit 1, the communication design of the sintering furnace unit 1 and the wax removal furnace unit 2 is carried out by utilizing the temperature relation between the sintering furnace unit 1 and the wax removal furnace unit 2, and the redundant heat in the sintering furnace unit 1 is provided for the wax removal furnace unit 2 for wax removal, so that the heat energy is fully utilized, compared with the existing split structure design, the integral energy consumption is lower, and the heat energy utilization rate is improved; by arranging the temperature control device 4 on the sintering furnace unit 1 and/or the wax removal furnace unit 2, the temperature rise gradient in the sintering furnace unit 1 and/or the wax removal furnace unit 2 can be monitored, adjusted and controlled in real time, so that the temperature rise gradient in the sintering process and/or the wax removal process is ensured to meet the product requirements, and the quality of the obtained ceramic product is ensured. Optionally, the adjusting of the temperature gradient in the sintering process and/or the dewaxing process further comprises: the conveying speed of the materials, the depth length of the sintering furnace unit 1 and/or the wax removal furnace unit 2, the heating temperature in the sintering furnace unit 1 and/or the wax removal furnace unit 2 and the like. Optionally, two groups of sintering furnace units 1 are arranged, the two groups of sintering furnace units 1 are arranged in parallel and closely, the same natural gas combustion heat supply device 3 provides heat for the two groups of sintering furnace units 1 at the same time, or the two groups of natural gas combustion heat supply devices 3 provide heat for the two groups of sintering furnace units 1 respectively; the lateral sides of the two groups of sintering furnace units 1 are respectively provided with a group of de-waxing furnace units 2, and then the four groups of parallel furnace units are combined to form a sintering de-waxing kiln. Optionally, a set of wax removing furnace units 2 is respectively arranged on two sides of the set of sintering furnace units 1.

As shown in fig. 1 and fig. 2, in the present embodiment, a sintering preheating zone 101, a high-temperature sintering zone 102, a sintering heat preservation zone 103, and a sintering cooling zone 104 are sequentially arranged in the inner cavity of the sintering furnace unit 1 from the feeding port to the discharging port. The inner cavity of the sintering furnace unit 1 is correspondingly divided into areas according to the sintering temperature rise gradient of the ceramic product. Optionally, the depth length of each region may be designed, and the residence time of the material in the time period is adjusted by combining the traveling speed of the material, so as to adjust the temperature rise gradient of material sintering. The inner cavity of the dewaxing furnace unit 2 is sequentially provided with a dewaxing preheating zone 201, a dewaxing self-combustion zone 202, a high-temperature dewaxing burning zone 203, a dewaxing heat preservation zone 204 and a dewaxing cooling zone 205 from the feeding port to the discharging port. The inner cavity of the sintering furnace unit 1 is correspondingly divided into areas according to the wax removal heating gradient of the ceramic product. Optionally, the depth length of each region can be designed, the residence time of the material in the time period is adjusted by combining the advancing speed of the material, and then the temperature rise gradient of the material de-waxing is adjusted. The air flow output end of the high-temperature sintering area 102 is communicated with the high-temperature de-waxing and burning area 203, and/or the air flow input end of the sintering heat preservation area 103 is communicated with the high-temperature de-waxing and burning area 203, and/or the air flow output end of the sintering heat preservation area 103 is communicated with the de-waxing and heat preservation area 204. According to respective temperature gradient requirements of the sintering furnace unit 1 and the wax removal furnace unit 2, the sintering furnace unit 1 and the wax removal furnace unit 2 are associated, so that areas with similar temperature requirements are designed together, the areas are communicated, redundant heat in the sintering furnace unit 1 flows to the area with the relatively close temperature or the relatively low temperature in the wax removal furnace unit 2, and accordingly corresponding heat is provided for wax removal in the area.

Alternatively, as shown in fig. 3, the inner cavity of the sintering furnace unit 1 is divided into an upper layer and a lower layer; an upper layer cavity in the inner cavity of the sintering furnace unit 1 is a material conveying cavity, and the material conveying cavity comprises a sintering preheating zone 101, a high-temperature sintering zone 102, a sintering heat preservation zone 103 and a sintering cooling zone 104 which are sequentially arranged from a feeding hole to a discharging hole; the sintering preheating zone 101, the high-temperature sintering zone 102, the sintering heat preservation zone 103 and the sintering cooling zone 104 are separated by a temperature resistance plate 5 which can be adjusted up and down; because the material formulas are different, the temperature rise gradients matched with material sintering are also different correspondingly, the control of the flow velocity and the flow of air flow is realized by adjusting the temperature resistance plate 5, and the temperature in each area is further controlled, so that the temperature rise gradients in the inner cavity of the sintering furnace unit 1 are matched with the temperature rise gradients required by material sintering; the lower cavity in the inner cavity of the sintering furnace unit 1 is a sintering waste heat backflow channel which is communicated with the sintering preheating zone 101 and is respectively communicated with at least one of the high-temperature sintering zone 102, the sintering heat preservation zone 103 and the sintering cooling zone 104, so that redundant high-temperature airflow in at least one of the high-temperature sintering zone 102, the sintering heat preservation zone 103 and the sintering cooling zone 104 flows back to the sintering preheating zone 101 through the sintering waste heat backflow channel, thereby forming multi-directional recycling of waste heat in the sintering furnace unit 1, fully preheating the material entering the sintering preheating zone 101, enabling the material to fully and saturably absorb heat in the sintering preheating zone 101 and then enter the high-temperature sintering zone 102 for sintering, further reducing the combustion amount of natural gas in the high-temperature sintering zone 102, fully playing the multi-directional recycling and fixed-point supplementing heat requirements of specific zones in the kiln, thereby meeting the requirements of energy conservation and environmental protection.

Alternatively, as shown in fig. 4, the inner cavity of the dewaxing furnace unit 2 is divided into an upper layer and a lower layer; an upper layer cavity in the inner cavity of the dewaxing furnace unit 2 is a material conveying cavity, and the material conveying cavity comprises a dewaxing preheating zone 201, a dewaxing self-burning zone 202, a high-temperature dewaxing burning zone 203, a dewaxing heat preservation zone 204 and a dewaxing cooling zone 205 which are sequentially arranged from a feeding hole to a discharging hole; the dewaxing preheating zone 201, the dewaxing self-burning zone 202, the high-temperature dewaxing burning zone 203, the dewaxing heat preservation zone 204 and the dewaxing cooling zone 205 are separated by a temperature resistance plate 5 which can be adjusted up and down; because the material formulas are different, the temperature rise gradients matched with the material dewaxing are correspondingly different, the control of the airflow speed and the flow is realized by adjusting the temperature resistance plate 5, and the temperature in each area is further controlled, so that the temperature rise gradient in the inner cavity of the dewaxing furnace unit 2 is matched with the temperature rise gradient required by the material dewaxing; the lower cavity in the inner cavity of the de-waxing furnace unit 2 is a de-waxing waste heat backflow channel which is communicated with the de-waxing preheating zone 201 and is respectively communicated with at least one of the de-waxing self-burning zone 202, the high-temperature de-waxing burning zone 203, the de-waxing heat preservation zone 204 and the de-waxing cooling zone 205, so that redundant high-temperature airflow in at least one of the de-waxing self-burning zone 202, the high-temperature de-waxing burning zone 203, the de-waxing heat preservation zone 204 and the de-waxing cooling zone 205 flows back to the de-waxing preheating zone 201 through the de-waxing waste heat backflow channel, thereby forming multi-directional recycling of waste heat in the de-waxing furnace unit 2, fully preheating the material entering the de-waxing preheating zone 201, enabling the material to fully and saturably absorb heat in the de-waxing preheating zone 201 and then enter the de-waxing self-burning zone 202 for high-temperature de-waxing, further being capable of reducing the energy utilization amount of the de-waxing self-burning zone 202, fully exerting multi-directional recycling in the kiln, The heat requirement of a specific area is supplemented at a fixed point, so that the requirements of energy conservation and environmental protection are met.

As shown in fig. 1, in this embodiment, the natural gas combustion heat supply device 3 includes a natural gas spray gun 301 and a heat exchange coil 302, the heat exchange coil 302 is disposed in the sintering heat preservation area 103 and/or the sintering cooling area 104, an airflow inlet of the heat exchange coil 302 is communicated to the sintering heat preservation area 103 and/or the sintering cooling area 104, an airflow outlet of the heat exchange coil 302 is communicated to an air connector of the natural gas spray gun 301 through an air inlet pipe 303, a natural gas connector of the natural gas spray gun 301 is communicated to a natural gas pipeline through a natural gas inlet pipe 304, and an output end of the natural gas spray gun 301 is communicated into the high-temperature sintering area 102 to supply heat to the high-temperature sintering area 102 through natural gas combustion. The natural gas spray gun 301 is provided with a flame nozzle, a natural gas joint, an air joint and an automatic electronic ignition device, natural gas is connected in through the natural gas joint, air is connected in through the air joint to provide enough oxygen for the combustion of the natural gas, and the natural gas and the oxygen are mixed in the flame nozzle to be ignited so as to supply heat for the high-temperature sintering area 102; the heat of the high-temperature sintering zone 102 is comprehensively controlled by the proportion of the introduced natural gas and the air input. Optionally, the output end of the natural gas spray gun 301 is arranged from the sintering heat preservation area 103 to the high-temperature sintering area 102 and obliquely downwards, a temperature-resistant plate 5 with adjustable extension height is arranged between the high-temperature sintering area 102 and the sintering heat preservation area 103, and the retention time of heat in the area is prolonged by adjusting the extension height of the temperature-resistant plate 5 by utilizing the hot gas flow rising principle; the temperature resistance plate 5 is extended into the area with the height matched with the flame nozzle at the output end of the natural gas spray gun 301 for control, so that the area where the natural gas flame output by the natural gas spray gun 301 stays in a concentrated manner is controlled, the high-temperature concentrated area is further controlled, and the position of the highest temperature in the high-temperature gradient is adjusted; meanwhile, the temperature range direction from the sintering furnace unit 1 to the wax removal furnace unit 2 can be synchronously controlled, and the temperature gradient of the wax removal furnace unit 2 is indirectly changed. The natural gas lance 301 sucks air from the sintering heat preservation area 103 and/or the sintering cooling area 104, and simultaneously, the air in the sintering heat preservation area 103 and/or the sintering cooling area 104 flows into the natural gas lance 301 through the heat exchange coil 302, and because the heat exchange coil 302 is arranged in the sintering heat preservation area 103 and/or the sintering cooling area 104, hot air in the sintering heat preservation area 103 and/or the sintering cooling area 104 circularly moves in the high-temperature sintering area 102, the sintering heat preservation area 103 and the sintering cooling area 104, and is continuously heated and heated by the natural gas lance 301, so that heat damage is reduced, and pollution caused by heat loss from a sintering discharge port is avoided.

As shown in fig. 1, in this embodiment, the temperature control device 4 includes a temperature sensor, an exhaust pipe, an exhaust fan, and a temperature controller, the temperature sensor is disposed at least one of the sintering preheating zone 101, the high-temperature sintering zone 102, the sintering soaking zone 103, and the sintering cooling zone 104, the exhaust fan is mounted on the exhaust pipe, and the exhaust pipe is mounted on the high-temperature sintering zone 102 and/or the sintering soaking zone 103 so as to guide the high-temperature gas flow in the high-temperature sintering zone 102 and/or the sintering soaking zone 103 to the outside. The temperature change of each area of the sintering furnace unit 1 is induced through the temperature sensor so as to obtain the actual temperature gradient of the whole sintering furnace unit 1, the temperature controller compares the actual temperature gradient of the sintering furnace unit 1 with the preset temperature gradient of the sintering furnace unit 1 and controls the operation of the exhaust fan, and therefore the actual temperature gradient of the sintering furnace unit 1 is close to the preset temperature gradient of the sintering furnace unit 1. Optionally, at least one temperature sensor is disposed in at least one of the sintering preheating zone 101, the high-temperature sintering zone 102, the sintering heat preservation zone 103, and the sintering cooling zone 104, that is, one temperature sensor may be disposed, or a plurality of temperature sensors may be disposed, for example, the temperature sensors are disposed at the zone inlet and the zone outlet, respectively. Optionally, the temperature sensor is arranged near a critical area, namely at least one of an area inlet, an area outlet and an area where the highest temperature is located of the high-temperature sintering area 102; and/or a zone inlet and/or a zone outlet arranged in the sintering holding zone 103; and/or the zone outlet of the sintering preheating zone 101. Through the reasonable arrangement of the temperature sensors, temperature values of a plurality of key point positions in the sintering furnace unit 1 are known, the temperature gradient of the inner cavity of the whole sintering furnace unit 1 is obtained, the actual temperature gradient is compared with the preset temperature gradient, the temperature controller controls the starting of the exhaust fan according to the comparison data signal, and hot air at a specific position is discharged outwards, so that the temperature of the inner cavity of the sintering furnace unit 1 is changed, the actual temperature gradient is influenced, the actual temperature gradient is close to the preset temperature gradient, and the sintering requirement of ceramic products is met.

As shown in fig. 1, in this embodiment, the temperature control device 4 includes a temperature sensor, an exhaust pipe, an exhaust fan, and a temperature controller, the temperature sensor is disposed at least one of the dewaxing preheating zone 201, the dewaxing self-burning zone 202, the high-temperature dewaxing burning zone 203, the dewaxing heat preservation zone 204, and the dewaxing cooling zone 205, the exhaust fan is mounted on the exhaust pipe, and the exhaust pipe is mounted in the dewaxing self-burning zone 202 and/or the high-temperature dewaxing burning zone 203 so as to guide the high-temperature air flow in the dewaxing self-burning zone 202 and/or the high-temperature dewaxing burning zone 203 to the outside. The temperature change of each region of the wax removal furnace unit 2 is sensed through the temperature sensor, so that the actual temperature gradient of the whole wax removal furnace unit 2 is obtained, the temperature controller compares the actual temperature gradient of the wax removal furnace unit 2 with the preset temperature gradient of the wax removal furnace unit 2 and controls the operation of the exhaust fan, and therefore the actual temperature gradient of the wax removal furnace unit 2 is close to the preset temperature gradient of the wax removal furnace unit 2. Optionally, at least one temperature sensor is disposed in at least one of the dewaxing preheating zone 201, the dewaxing self-combustion zone 202, the high-temperature dewaxing combustion zone 203, the dewaxing heat preservation zone 204, and the dewaxing cooling zone 205, that is, one temperature sensor may be disposed, or a plurality of temperature sensors may be disposed, for example, the temperature sensors are disposed at the zone inlet and the zone outlet, respectively. Optionally, the temperature sensor is arranged near a critical area, namely at least one of an area inlet, an area outlet and an area where the highest temperature is located of the wax removal spontaneous combustion area 202; and/or the high-temperature dewaxing and burning material is arranged at least one of the area inlet, the area outlet and the area with the highest temperature of the high-temperature dewaxing and burning area 203; and/or at a zone inlet and/or a zone outlet of the de-waxing holding zone 204; and/or the zone outlet of the de-waxing preheating zone 201. Through the reasonable arrangement of temperature sensor, and then know the temperature value of several key point positions in the wax removal stove unit 2, obtain the temperature gradient of the whole wax removal stove unit 2 inner chamber roughly, compare with predetermined temperature gradient according to actual temperature gradient, temperature controller controls the start-up of exhaust fan according to comparing data signal, and then outwards discharge through the hot gas flow with specific position to cause the temperature of the 2 inner chambers of wax removal stove unit to change, and then influence actual temperature gradient and make actual temperature gradient be close to predetermined temperature gradient, thereby satisfy ceramic product wax removal needs.

As shown in fig. 1, in the present embodiment, a temperature blocking plate 5 which is adjustable in the vertical direction and used for blocking heat in a region by using the hot gas flow rising principle is provided at the output end of the natural gas spray gun 301 to stabilize the temperature in the region. The output end of the natural gas spray gun 301 is arranged from the sintering heat preservation area 103 to the direction of the high-temperature sintering area 102 and is obliquely arranged downwards, a temperature-resistant plate 5 with adjustable stretching height is arranged between the high-temperature sintering area 102 and the sintering heat preservation area 103, and the heat retention time in the area is prolonged by adjusting the stretching height of the temperature-resistant plate 5 by utilizing the hot air flow rising principle; the temperature resistance plate 5 is extended into the area with the height matched with the flame nozzle at the output end of the natural gas spray gun 301 for control, so that the area where the natural gas flame output by the natural gas spray gun 301 stays in a concentrated manner is controlled, the high-temperature concentrated area is further controlled, and the position of the highest temperature in the high-temperature gradient is adjusted; meanwhile, the temperature range direction from the sintering furnace unit 1 to the wax removal furnace unit 2 can be synchronously controlled, and the temperature gradient of the wax removal furnace unit 2 is indirectly changed.

As shown in fig. 1 and fig. 2, in the present embodiment, a temperature-blocking plate 5 for blocking heat in a region by using a hot gas flow rising principle to stabilize the temperature in the region is provided at an upper portion of at least one of a position between the sintering preheating region 101 and the high-temperature sintering region 102, a position between the high-temperature sintering region 102 and the sintering soaking region 103, and a position between the sintering soaking region 103 and the sintering cooling region 104. By using the hot gas flow rising principle, the temperature resistance plates 5 are arranged among the regions to lock the temperature intervals in the regions, thereby stabilizing the temperature rising gradient in the sintering furnace unit 1. In addition, due to the difference of material formulas, the temperature rise gradient matched with material sintering is also different correspondingly, so that the control of the flow velocity and the flow of air flow is realized by adjusting the temperature resistance plate 5, the temperature in each area is further controlled, and the temperature rise gradient in the inner cavity of the sintering furnace unit 1 is matched with the temperature rise gradient required by material sintering.

As shown in fig. 1 and fig. 2, in the present embodiment, a temperature-resistant plate 5 for blocking heat in the region by using the hot air flow rising principle to stabilize the temperature in the region is disposed on the upper portion of at least one of the places between the dewaxing preheating zone 201 and the dewaxing self-burning zone 202, between the dewaxing self-burning zone 202 and the high-temperature dewaxing burning zone 203, between the high-temperature dewaxing burning zone 203 and the dewaxing heat-resistant holding zone 204, and between the dewaxing heat-resistant holding zone 204 and the dewaxing cooling zone 205. By utilizing the hot air flow rising principle, the temperature resistance plates 5 are distributed among all the areas to lock the temperature intervals in all the areas, thereby stabilizing the temperature rise gradient in the wax removal furnace unit 2. In addition, due to the difference of material formulas, the temperature rise gradient matched with the material dewaxing is also different correspondingly, so that the control of the airflow speed and the flow is realized by adjusting the temperature resistance plate 5, the temperature in each area is further controlled, and the temperature rise gradient in the inner cavity of the dewaxing furnace unit 2 is matched with the temperature rise gradient required by the material dewaxing.

As shown in fig. 1 and fig. 2, in the present embodiment, a plurality of wax removal preheating units 2011 are formed in the wax removal preheating zone 201 in a separated manner, and a temperature blocking plate 5 for blocking heat in the zone by using a hot air flow rising principle to stabilize the temperature in the zone is disposed at an upper portion between two adjacent wax removal preheating units 2011; the high-temperature dewaxing firing area 203 and/or the dewaxing heat preservation area 204 are/is provided with temperature adjusting pipes 206 which are sequentially communicated with the dewaxing preheating units 2011 and used for respectively supplying heat to the dewaxing preheating units 2011, the temperature adjusting pipes 206 outside the dewaxing preheating units 2011 are provided with flow fans 207 used for adjusting the flow of air flow introduced into the dewaxing preheating units 2011, and the flow fans 207 and the dewaxing preheating units 2011 are arranged in a one-to-one correspondence manner. The preheating temperature is provided for the dewaxing preheating zone 201 by utilizing the redundant heat in the high-temperature dewaxing firing zone 203 and/or the dewaxing heat preservation zone 204. The high-temperature dewaxing firing area 203 and/or the dewaxing heat preservation area 204 are/is communicated to the distance of each dewaxing preheating unit 2011, the farther the distance is, the lower the temperature is, the closer the distance is, the higher the temperature is, the direction is just matched with the entering direction of the material, namely, the temperature is higher and higher along with the depth of the material, and the temperature rise gradient requirement of the material dewaxing is also met.

In the embodiment, as shown in fig. 1, a cooling gas recovery pipe 6 connected to the sintering cooling zone 104 is disposed on the dewaxing cooling zone 205. Optionally, the cooling gas recovery pipe 6 is used in cooperation with the natural gas combustion heating device 3, and the residual heat gas in the dewaxing cooling region 205 flows to the airflow circulation system through the cooling gas recovery pipe 6 and is added to the airflow circulation system through airflow circulation systems in three areas, namely the high-temperature sintering area 102, the sintering heat preservation area 103 and the sintering cooling area 104, which are formed by the natural gas combustion heating device 3, so that the residual heat gas in the dewaxing cooling region 205 is recycled, and the pollution caused by the fact that the residual heat gas in the dewaxing cooling region 205 is discharged outside through a dewaxing discharge hole is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A sintering de-waxing kiln comprises a sintering furnace unit (1) and a de-waxing furnace unit (2) arranged on the lateral side of the sintering furnace unit (1),

the sintering furnace unit (1) is communicated to the de-waxing furnace unit (2) and discharges high-temperature sintering waste heat to the de-waxing furnace unit (2) for de-waxing,

it is characterized in that the preparation method is characterized in that,

the sintering furnace unit (1) is provided with a natural gas combustion heating device (3) for providing high sintering temperature,

and the sintering furnace unit (1) and/or the wax removal furnace unit (2) are/is provided with a temperature control device (4) for adjusting the temperature gradient in the furnace by controlling the discharge amount of the high-temperature air flow in the furnace to be sucked and discharged outwards.

2. The sintering de-waxing kiln as set forth in claim 1,

a sintering preheating zone (101), a high-temperature sintering zone (102), a sintering heat preservation zone (103) and a sintering cooling zone (104) are sequentially distributed in the inner cavity of the sintering furnace unit (1) from the feeding hole to the discharging hole;

the inner cavity of the dewaxing furnace unit (2) is sequentially provided with a dewaxing preheating zone (201), a dewaxing self-burning zone (202), a high-temperature dewaxing firing zone (203), a dewaxing heat preservation zone (204) and a dewaxing cooling zone (205) from a feeding hole to a discharging hole;

the gas flow output end of the high-temperature sintering area (102) is communicated to the high-temperature de-waxing and burning area (203), and/or the gas flow input end of the sintering heat preservation area (103) is communicated to the high-temperature de-waxing and burning area (203), and/or the gas flow output end of the sintering heat preservation area (103) is communicated to the de-waxing and heat preservation area (204).

3. The sintering de-waxing kiln as set forth in claim 2,

the natural gas combustion heating device (3) comprises a natural gas spray gun (301) and a heat exchange coil pipe (302),

the heat exchange coil (302) is arranged in the sintering heat preservation area (103) and/or the sintering cooling area (104), an airflow inlet of the heat exchange coil (302) is communicated with the sintering heat preservation area (103) and/or the sintering cooling area (104), an airflow outlet of the heat exchange coil (302) is communicated with an air joint of the natural gas spray gun (301) through an air inlet pipe (303),

a natural gas joint of the natural gas spray gun (301) is communicated to a natural gas pipeline through a natural gas inlet pipe (304), and an output end of the natural gas spray gun (301) is communicated into the high-temperature sintering area (102) to supply heat to the high-temperature sintering area (102) through natural gas combustion.

4. The sintering de-waxing kiln as set forth in claim 3,

the temperature control device (4) comprises a temperature sensor, an exhaust pipe, an exhaust fan and a temperature controller,

the temperature sensor is arranged at least one of the sintering preheating zone (101), the high-temperature sintering zone (102), the sintering heat preservation zone (103) and the sintering cooling zone (104),

the exhaust fan is arranged on an exhaust pipe, and the exhaust pipe is arranged in the high-temperature sintering area (102) and/or the sintering heat preservation area (103) so as to lead out high-temperature airflow in the high-temperature sintering area (102) and/or the sintering heat preservation area (103) to the outside;

the method comprises the steps that temperature changes of all regions of a sintering furnace unit (1) are induced through a temperature sensor so as to obtain the actual temperature gradient of the whole sintering furnace unit (1), a temperature controller compares the actual temperature gradient of the sintering furnace unit (1) with the preset temperature gradient of the sintering furnace unit (1) and controls the operation of an exhaust fan, and therefore the actual temperature gradient of the sintering furnace unit (1) is close to the preset temperature gradient of the sintering furnace unit (1).

5. The sintering de-waxing kiln as set forth in claim 3,

the temperature control device (4) comprises a temperature sensor, an exhaust pipe, an exhaust fan and a temperature controller,

the temperature sensor is arranged at least one of the de-waxing preheating zone (201), the de-waxing self-burning zone (202), the high-temperature de-waxing burning zone (203), the de-waxing heat preservation zone (204) and the de-waxing cooling zone (205),

the exhaust fan is assembled on an exhaust pipe, and the exhaust pipe is assembled in the de-waxing self-burning zone (202) and/or the high-temperature de-waxing burning zone (203) so as to lead out high-temperature airflow in the de-waxing self-burning zone (202) and/or the high-temperature de-waxing burning zone (203) to the outside;

the temperature variation of each region of the de-waxing furnace unit (2) is sensed through a temperature sensor, so that the whole temperature variation of the de-waxing furnace unit (2) is obtained, a temperature controller compares the actual temperature gradient of the de-waxing furnace unit (2) with the preset temperature gradient of the de-waxing furnace unit (2) and controls the operation of an exhaust fan, and therefore the actual temperature gradient of the de-waxing furnace unit (2) is close to the preset temperature gradient of the de-waxing furnace unit (2).

6. The sintering dewaxing kiln of any of claims 3 to 5,

the output end of the natural gas spray gun (301) is provided with a temperature-resistant plate (5) which is adjustable along the vertical direction and is used for blocking heat in the region by utilizing the hot air flow rising principle so as to stabilize the temperature in the region.

7. The sintering dewaxing kiln of any of claims 2 to 5,

and a temperature-resistant plate (5) for blocking heat in the region by utilizing the hot gas flow rising principle to stabilize the temperature in the region is arranged on the upper part of at least one of the positions between the sintering preheating region (101) and the high-temperature sintering region (102), between the high-temperature sintering region (102) and the sintering heat-preserving region (103) and between the sintering heat-preserving region (103) and the sintering cooling region (104).

8. The sintering dewaxing kiln of any of claims 2 to 5,

the upper part of at least one of the positions between the wax removal preheating zone (201) and the wax removal self-combustion zone (202), between the wax removal self-combustion zone (202) and the high-temperature wax removal burning zone (203), between the high-temperature wax removal burning zone (203) and the wax removal heat preservation zone (204), and between the wax removal heat preservation zone (204) and the wax removal cooling zone (205) is provided with a heat resistance plate (5) for utilizing the hot air flow rising principle to block heat in the zone so as to stabilize the temperature in the zone.

9. The sintering de-waxing kiln as set forth in claim 8,

a plurality of wax removal preheating units (2011) are formed in the wax removal preheating zone (201) in a separated mode, and a temperature resistance plate (5) used for blocking heat in a zone by utilizing a hot air flow rising principle to stabilize the temperature in the zone is arranged at the upper portion between every two adjacent wax removal preheating units (2011);

the high-temperature de-waxing and firing area (203) and/or the de-waxing and heat-preserving area (204) are/is provided with temperature adjusting pipes (206) which are sequentially communicated with the de-waxing and preheating units (2011) and are used for respectively supplying heat to the de-waxing and preheating units (2011),

the device is characterized in that a flow fan (207) used for adjusting the flow of air flowing into the dewaxing preheating unit (2011) is arranged on the temperature adjusting pipe (206) outside the dewaxing preheating unit (2011), and the flow fan (207) and the dewaxing preheating unit (2011) are arranged in a one-to-one correspondence mode.

10. The sintering dewaxing kiln of any of claims 2 to 5,

and a cooling gas recovery pipe (6) communicated with the sintering cooling area (104) is arranged on the dewaxing cooling area (205).

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