Energy-saving kiln

Abstract

The invention discloses an energy-saving kiln, comprising a kiln wall, wherein burner brackets are arranged at equal intervals in the kiln wall, burners for spraying fire into the furnace body are installed on the burner brackets, a polycrystalline cotton layer is arranged at one end of the burner bracket facing the inside of the kiln, and a zirconium-containing asbestos layer and a common asbestos layer are arranged in sequence at one end of the burner bracket away from the inside of the kiln, a kiln roof is erected on the upper end of the kiln wall, and a polycrystalline cotton layer, a ceiling frame, a zirconium-containing asbestos layer and a common asbestos layer are arranged in sequence from bottom to top on the kiln roof, a kiln car moving along the length direction of the furnace body is arranged in the kiln, and a common asbestos layer, a zirconium-containing asbestos layer and a polycrystalline cotton layer are installed in sequence on the upper surface of the kiln car, and the invention solves the technical difficulties encountered in the installation of a full asbestos kiln body by installing the burner bracket in the asbestos wall and adopting an air curtain sealing technology on the contact surface between the kiln car and the wall of the firing zone below, thereby greatly improving the energy-saving level of the kiln.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic kilns, in particular to an energy-saving kiln. Background Art

[0002] The tunnel kiln firing product industry uses high-temperature kilns for high-temperature firing. They are built with high-temperature resistant bricks and then affix high-temperature cotton to the inner wall of the kiln. Burning guns are arranged up and down on both sides of the kiln to fire the products. The method of using high-temperature resistant bricks as the main load-bearing insulation material of the kiln is generally limited to long construction period (120 days), low thermal energy utilization efficiency, high firing cost (accounting for more than 35% of the total cost), poor quality of fired products, and high cost of building kilns.

[0003] According to the comparison of the performance of current heat-resistant materials, the heat-resistant and heat-insulating performance of asbestos is 35-40% higher than that of high-temperature heat-resistant bricks. If asbestos is used to replace high-temperature heat-resistant bricks, it is equivalent to reducing energy consumption by 35-40%. In order to achieve the same temperature between the upper and lower parts of the existing tunnel kiln, burners are arranged on the upper and lower parts of the kiln body for firing to make the upper and lower temperatures of the kiln body consistent. If asbestos is used to replace high-temperature heat-resistant bricks as walls to reduce energy consumption, although the energy-saving effect is obvious, asbestos cannot bear the weight of the burner and the weight of the kiln roof, causing the kiln to collapse easily. Therefore, the current kiln firing technology can only use high-temperature heat-resistant insulation bricks for brickwork, which has poor insulation performance and high energy consumption per kiln. Summary of the invention

[0004] The purpose of the present invention is to improve and innovate the shortcomings and problems existing in the background technology and to propose a new

[0005] Energy-saving kiln.

[0006] An energy-saving kiln comprises a kiln wall and a kiln roof, wherein the kiln wall and the kiln roof form a kiln

[0007] cavity, burner brackets are arranged at intervals in the wall of the kiln along the length direction of the furnace body, the burner brackets include an upper burner bracket and a lower burner bracket, burners for spraying fire into the furnace body are installed on the burner brackets, a first polycrystalline wool layer is arranged at one end of the burner bracket facing the furnace cavity, a first zircon-containing asbestos layer is arranged at one end of the burner bracket away from the furnace cavity, a first ordinary asbestos layer is arranged at one end of the first zircon-containing asbestos layer away from the first polycrystalline wool layer, the kiln roof is erected on the wall of the kiln, a second polycrystalline wool layer, a second zircon-containing asbestos layer and a second ordinary asbestos layer are arranged on the kiln roof from bottom to top, a ceiling frame is arranged between the second polycrystalline wool layer and the second zircon-containing asbestos layer, and a kiln car for traveling along the length direction of the furnace body is arranged in the kiln.

[0008] It can be seen from the above technical solution that the burner bracket and the ceiling frame serve as the support of the kiln wall and the kiln roof.

[0009] The frame supports the weight of the burner and the kiln roof. At the same time, polycrystalline wool is arranged between the burner bracket and the ceiling frame and the furnace cavity to prevent the high-temperature flame in the furnace from directly contacting the supporting frame, so that the kiln body will not deform during long-term high-temperature use and the kiln will not collapse due to heat. At the same time, the heat-resistant and heat-insulating performance of asbestos is 35-40% higher than the heat-insulating effect of high-temperature heat-resistant bricks. Therefore, polycrystalline asbestos is used to replace high-temperature heat-resistant bricks to build kiln walls, which has obvious energy-saving effects and the energy-saving rate can reach more than 35%.

[0010] A further solution is that the upper surface of the kiln car is sequentially provided with a third ordinary asbestos layer, a third zirconium-containing asbestos layer, and a

[0011] and a third polycrystalline cotton layer, a slit is provided between the kiln car and the kiln wall, a sealed air pipe is provided at the lower end of the bottom of the kiln wall, an air outlet is provided on the sealed air pipe, and baffles matching the sealed air pipe are installed on both sides of the lower end of the kiln car.

[0012] It can be seen that the gas under a certain pressure is ejected through the air outlet of the sealed air pipe, which prevents the high-temperature flame in the furnace from jumping down to the kiln car through the narrow gap between the kiln wall and the kiln car and damaging the kiln car.

[0013] A further solution is that a support plate is provided at the bottom of the kiln wall, a support frame is fixedly connected to the lower surface of the support plate, and one end of the support frame away from the kiln wall is installed on the ground.

[0014] It can be seen that through the transmission effect of the support plate and the support frame, the overall total amount of the kiln is transmitted to the ground, which improves the operating stability of the kiln.

[0015] A further solution is that the burner comprises an upper burner and a lower burner, and the upper burners are connected via a burner fixing bracket.

[0016] It can be seen that the burner fixing bracket also serves as a supporting frame of the kiln wall, further improving the operating stability of the kiln wall when heated.

[0017] A further solution is that the first zirconium-containing asbestos layer is locked on the first ordinary asbestos layer by self-locking pins, the second zirconium-containing asbestos layer is locked on the second ordinary cotton layer by self-locking pins, the first polycrystalline cotton layer is bonded to the first zirconium-containing asbestos layer by heat-resistant glue, and the second polycrystalline cotton layer is bonded to the second zirconium-containing asbestos layer by heat-resistant glue.

[0018] A further solution is that the burner bracket, ceiling frame and burner fixing bracket play the role of supporting the weight of the kiln wall and the kiln roof, and the burner bracket, ceiling frame and burner fixing bracket are made of silicon carbide or high-alumina bricks or mullite and other materials.

[0019] It can be seen that the silicon carbide or high alumina or mullite has good heat resistance and can meet the requirements of high temperature use.

[0020] A further solution is that both ends of the second common asbestos layer extend downward to wrap around the second polycrystalline asbestos layer and the second zirconium-containing asbestos layer.

[0021] A further solution is that a furnace outer wall support is provided at one end of the first common asbestos layer and the second common asbestos layer away from the furnace cavity.

[0022] A further solution is that the air outlets are arranged at intervals along the axial direction of the sealed air pipe and the installation positions of the air outlets on the sealed air pipe correspond to the installation positions of the lower burners on the kiln wall.

[0023] It can be seen that the high-temperature flame ejected from the lower burner and the gas of a certain pressure ejected from the sealed air pipe outlet will meet in the narrow gap, which can effectively prevent the high-temperature flame from jumping down to the kiln car and damaging the kiln car.

[0024] A further solution is that one end of the baffle away from the kiln car extends toward the sealed air pipe but does not contact the sealed air pipe, the baffle is located below the air outlet, and the baffle extends along the length direction of the kiln car.

[0025] It is understandable that such an arrangement can prevent the kiln car from colliding with the kiln wall during its forward movement, and can also achieve a good fire prevention effect.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) The burner bracket, burner fixing bracket and ceiling frame made of heat-resistant materials are used as the kiln wall and kiln

[0028] The supporting frame of the furnace roof plays the role of supporting the deadweight of the burner and the deadweight of the kiln roof. At the same time, polycrystalline wool is arranged between the burner bracket, the burner fixing bracket, the ceiling frame and the inside of the furnace body to prevent the high-temperature flame in the furnace from directly contacting the supporting frame, making the full-cotton structure of the kiln a reality. The full-cotton structure of the kiln wall can be used at high temperature for a long time without deformation, and the kiln will not collapse when heated. The heat-resistant and heat-insulating performance of asbestos is 35-40% higher than that of high-temperature heat-resistant bricks. Therefore, polycrystalline asbestos is used to replace high-temperature heat-resistant bricks to build the kiln wall, which has obvious energy-saving effects, and the energy-saving rate can reach more than 35%. It also greatly reduces the overall weight of the kiln, greatly reduces the foundation requirements of the kiln, and is convenient for the construction and use of multi-story or more workshops;

[0029] (2) The existing technology of kiln wall stacking high temperature heat-resistant bricks is replaced by the installation of asbestos panels as a whole, which reduces the installation workload and greatly shortens the construction period. At the same time, the thermal expansion and contraction performance of asbestos is better than that of high temperature heat-resistant bricks. The kiln using high temperature heat-resistant bricks is more susceptible to damage and the maintenance interval is short.

[0030] (3) The kilns in the prior art are constructed by laying high-temperature resistant bricks and then pasting high-temperature cotton on the inner wall of the kiln. The thermal properties of the high-temperature resistant bricks and the high-temperature cotton are very different, resulting in the kiln being unable to heat up rapidly. The present invention overcomes the defect of the prior art that the temperature cannot be rapidly heated by using a pure cotton structure, and the temperature can be raised to the normal firing temperature in a short time, while also achieving the purpose of saving energy.

[0031] (4) Traditional high-temperature heat-resistant bricks have poor thermal insulation performance and require a certain thickness to block heat. By using pure cotton structure to build the kiln wall, the thickness of the kiln wall is greatly reduced and the weight of the kiln body is greatly reduced, which is equivalent to saving materials and reducing the investment cost of the kiln.

[0032] (5) Considering that the heat-resistant and heat-insulating properties of asbestos are 35-40% higher than those of high-temperature heat-resistant bricks, the firing zone of the asbestos kiln reaches the same temperature as that of the high-temperature heat-resistant brick kiln, and the burner flame ejection speed is relatively low, which reduces the flow rate in the firing zone of the kiln, helps to reduce the deformation rate of the fired products, and greatly improves the quality of the products. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the structure of the new energy-saving kiln of the present invention;

[0034] Figure 2 is a cross-sectional view of the kiln wall of the present invention;

[0035] Figure 3 The present invention Figure 1 A partial enlarged schematic diagram in the middle;

[0036] Figure numerals: burner 1, self-locking nail 2, first common asbestos layer 3, furnace outer wall bracket 4, support frame 5, baffle 6, kiln car 7, air outlet 8, sealed air pipe 9, support plate 10, first polycrystalline wool layer 11, first zirconium-containing asbestos layer 12, upper burner bracket 13, ceiling frame 14, burner fixing bracket 15, lower burner bracket 16, second polycrystalline wool layer 17, second zirconium-containing asbestos layer 18, second common asbestos layer 19, third polycrystalline wool layer 20, second zirconium-containing asbestos layer 21, second common asbestos layer 22, slit 23, furnace cavity 24 DETAILED DESCRIPTION

[0037] The following is combined with Figures 1 to 3 The present invention is described in further detail.

[0038] An energy-saving kiln comprises a kiln wall and a kiln roof, wherein the kiln wall and the kiln roof enclose a furnace cavity 24, the kiln roof is erected on the kiln wall, the kiln wall is respectively provided with a first polycrystalline wool layer 11, a first zirconium-containing asbestos layer 12 and a first ordinary asbestos layer 3 from the inside to the outside, and the kiln roof is respectively provided with a second polycrystalline wool layer 17, a second zirconium-containing wool layer 18 and a second ordinary asbestos layer 19 from bottom to top, the high temperature resistance of the polycrystalline wool, the zirconium-containing wool and the ordinary asbestos decreases in sequence, the first zirconium-containing asbestos layer 12 is locked in the first ordinary asbestos layer 19 by a self-locking nail 2 The second zirconium-containing asbestos layer 18 is locked on the second common asbestos layer 19 by a self-locking nail 2, the first polycrystalline cotton layer 3 is bonded to the first zirconium-containing asbestos layer 12 by a heat-resistant adhesive, the second polycrystalline cotton layer 20 is bonded to the second zirconium-containing asbestos layer 18 by a heat-resistant adhesive, and both ends of the second common asbestos layer 19 extend downward to wrap the second polycrystalline cotton layer 17 and the second zirconium-containing asbestos layer 18. The first common asbestos layer 3 and the second common asbestos layer 19 are provided with a furnace outer wall bracket 4 at one end away from the furnace chamber 24, and the furnace burning belt wall is provided along the furnace body length direction (such as Figure 1 A burner bracket is arranged at intervals (in the vertical direction of the paper), the burner bracket is arranged between the first polycrystalline wool layer 11 and the first zirconium-containing wool layer 12, a burner 1 for spraying fire into the furnace chamber 24 is installed on the burner bracket, the burner bracket includes an upper burner bracket 13 and a lower burner bracket 16, the burner 1 includes an upper burner 101 and a lower burner 102, the upper burner bracket 13 is installed with the upper burner 101, the lower burner 102 is installed on the lower burner bracket 16, the upper burners 101 are connected by a burner fixing bracket 15, a ceiling frame 14 is arranged between the second polycrystalline wool layer 17 and the second zirconium-containing wool layer 18 on the kiln roof, the burner bracket, the ceiling frame 14 and the burner fixing bracket 15 are made of silicon carbide or high-alumina bricks or mullite resistant The heat-resistant material is made of silicon carbide or high-alumina brick or mullite, which has good heat resistance and can meet high-temperature use. The burner bracket, ceiling frame 14 and burner fixing bracket 15 made of heat-resistant material are used as the supporting frame of the kiln wall and the kiln roof to support the dead weight of the burner 1 and the dead weight of the kiln roof. At the same time, polycrystalline wool is arranged between the burner bracket, the ceiling frame 14 and the burner fixing bracket 15 and the furnace cavity 24 to avoid direct contact of the high-temperature flame in the furnace with the supporting frame, so that the kiln body will not be deformed during long-term high-temperature use, and the kiln will not collapse due to heat. At the same time, the heat-resistant and heat-insulating performance of asbestos is 35-40% higher than the heat-insulating effect of high-temperature heat-resistant bricks of traditional kilns. Therefore, polycrystalline asbestos is used to replace high-temperature heat-resistant bricks to build kiln walls, which has obvious energy-saving effects.

[0039] In this embodiment: a kiln car 7 is arranged in the kiln furnace and travels along the length direction of the furnace body. A third common asbestos layer 22, a third zirconium-containing asbestos layer 21 and a third polycrystalline wool layer 20 are installed on the upper surface of the kiln car 7 in sequence from bottom to top. A slit 23 is arranged between the kiln car 7 and the kiln wall. A support plate 10 is arranged at the bottom of the kiln wall. A support frame 5 and a sealed air pipe 9 are fixedly connected to the lower surface of the support plate 10. The end of the support frame 5 away from the kiln wall is installed on the ground. Through the transmission effect of the support plate 10 and the support frame 5, the overall total amount of the kiln is transmitted to the ground, thereby improving the stability of the kiln operation. The sealed air pipe 9 is connected to an external blower, which is not shown in the figure. An air outlet 8 is arranged at intervals on the sealed air pipe 9. The air outlet 8 is arranged along the sealed air pipe 9. The tubes 9 are arranged axially at intervals and the installation position of the air outlet 8 on the sealed air tube 9 corresponds to the installation position of the lower burner 102 on the kiln wall. The high-temperature flame ejected from the lower burner 102 and the gas of a certain pressure ejected from the air outlet 8 opened on the sealed air tube 9 just meet in the slit 23, which can effectively prevent the high-temperature flame from jumping down to the kiln car 7 and damaging the kiln car 7. Baffles 6 matching the sealed air tube 9 are installed on both sides of the lower end of the kiln car 7. The baffles 6 are located below the air outlet 8. The baffles 6 extend along the length direction of the kiln car 7. At the same time, the end of the baffle 6 away from the kiln car 7 extends to the sealed air tube 9 but does not contact the sealed air tube 9, so that the kiln car 7 will not collide with the kiln wall during the forward movement, and can also play a good anti-fire effect.

[0040] The working principle of the present invention is: by using the burner bracket 13, the burner fixing bracket 15 and the ceiling frame 14 made of heat-resistant material as the supporting frame of the kiln wall and the kiln roof, the function of supporting the dead weight of the burner 1 and the dead weight of the kiln roof is achieved, and the technical problem that the traditional kiln asbestos cannot support the kiln wall and high-temperature heat-resistant bricks must be used to support the wall is solved. At the same time, a polycrystalline asbestos layer 11 is arranged between the burner bracket 13, the burner fixing bracket 15 and the ceiling frame 14 and the inside of the furnace body to prevent the high-temperature flame in the furnace from directly contacting the supporting frame, thereby extending the service life of the supporting frame and making the kiln body unchanged during long-term high-temperature use. In addition, a sealed air pipe 9 is arranged at the bottom end of the kiln wall, and an air outlet is opened at the position corresponding to the sealed air pipe 9 and the burner 1. The kiln car 7 has a plurality of air outlets, and the kiln car 7 has a plurality of air outlets. ...

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving kiln, comprising a kiln wall and a kiln roof, wherein the kiln wall and the kiln roof form a furnace cavity (24), characterized in that: Burner brackets are arranged in the kiln wall at intervals along the length direction of the furnace body, the burner brackets include an upper burner bracket (13) and a lower burner bracket (16), a burner (1) for spraying fire into the furnace body is installed on the burner bracket, a first polycrystalline wool layer (11) is arranged at one end of the burner bracket facing the furnace cavity (24), and a first zircon-containing wool layer (12) is arranged at one end of the burner bracket away from the furnace cavity (24), and the first zircon-containing wool layer (12) is away from the first polycrystalline wool layer (11). A first common asbestos layer (3) is arranged at one end of the crystal wool layer (11); the kiln roof is erected on the kiln wall; the kiln roof is sequentially arranged with a second polycrystalline wool layer (17), a second zircon-containing asbestos layer (18) and a second common asbestos layer (19) from bottom to top; a ceiling frame (14) is arranged between the second polycrystalline wool layer (17) and the second zircon-containing asbestos layer (18); a kiln car (7) is arranged in the kiln and moves along the length direction of the furnace body, wherein A support plate (10) is provided at the bottom of the kiln wall, a support frame (5) is fixedly connected to the lower surface of the support plate (10), and an end of the support frame (5) away from the kiln wall is installed on the ground; The burner (1) comprises an upper burner (101) and a lower burner (102), and the upper burner (101) is connected via a burner fixing bracket (15).

2. The energy-saving kiln according to claim 1, characterized in that: The upper surface of the kiln car (7) is provided with a third ordinary asbestos layer (22), a third zirconium-containing asbestos layer (21) and a third polycrystalline asbestos layer (20) in order from bottom to top; a slit (23) is provided between the kiln car (7) and the kiln wall; a sealed air pipe (9) is provided at the lower end of the bottom of the kiln wall; an air outlet (8) is provided on the sealed air pipe (9); baffles (6) matching the sealed air pipe (9) are provided on both sides of the lower end of the kiln car (7).

3. The energy-saving kiln according to claim 1, characterized in that: The first zirconium-containing asbestos layer (12) is locked on the first ordinary asbestos layer (3) by means of self-locking nails (2), and the second zirconium-containing asbestos layer (18) is locked on the first ordinary asbestos layer (3) by means of self-locking nails (2). The first polycrystalline wool layer (11) is bonded to the first zirconium-containing wool layer (12) by heat-resistant adhesive, and the second polycrystalline wool layer (17) is bonded to the second zirconium-containing wool layer (18) by heat-resistant adhesive.

4. The energy-saving kiln according to claim 1, characterized in that: The burner bracket, the ceiling frame (14) and the burner fixing bracket (15) play the role of supporting the weight of the kiln wall and the kiln roof. The burner bracket, the ceiling frame (14) and the burner fixing bracket (15) are made of silicon carbide or high-alumina bricks or mullite heat-resistant materials.

5. The energy-saving kiln according to claim 1, characterized in that: Both ends of the second ordinary asbestos layer (19) extend downward to wrap around the second polycrystalline asbestos layer (17) and the second zirconium-containing asbestos layer (18).

6. The energy-saving kiln according to claim 1, characterized in that: A furnace outer wall support (4) is provided at one end of the first common asbestos layer (3) and the second common asbestos layer (19) away from the furnace cavity (24).

7. The energy-saving kiln according to claim 2, characterized in that: The air outlets (8) are arranged at intervals along the axial direction of the sealed air pipe (9), and the installation positions of the air outlets (8) on the sealed air pipe (9) correspond to the installation positions of the lower burner (102) on the kiln wall.

8. The energy-saving kiln according to claim 2, characterized in that: One end of the baffle (6) away from the kiln car (7) extends toward the sealed air pipe (9) but does not contact the sealed air pipe (9). The baffle (6) is located below the air outlet (8) and extends along the length direction of the kiln car (7).

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