Energy-saving kiln

Abstract

The utility model discloses an energy-saving kiln which comprises a roller kiln body, one end of the roller kiln body is provided with a preheating section, the other end of the roller kiln body is provided with a cooling section, the energy-saving kiln further comprises a first exhaust mechanism, a second exhaust mechanism and an air guide mechanism, and the first exhaust mechanism is arranged at the exhaust end of the preheating section; the second exhaust mechanism is arranged at the exhaust end of the cooling section; the air guide mechanism is arranged at the exhaust end of the second exhaust mechanism and the air inlet end of the preheating section and guides hot air into the preheating section through double-way staggered ventilation. The air guide mechanism is structurally arranged and is connected to the exhaust end of the second exhaust mechanism and the air inlet end of the preheating section, so that cooling and preheating of the cooling section can be guided to the preheating section for heat utilization, and energy is saved; and meanwhile, the air guide mechanism guides hot air into the preheating section in a double-path staggered ventilation mode, and under staggered ventilation preheating, the product preheating is more uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to product processing equipment field, especially a kind of energy-saving kiln. BACKGROUND

[0002] With the rapid development of industry, in addition to the widespread use of roller kiln in ceramic building materials such as ceramic tiles, wall tiles, at present, the drying, calcination and sintering processes of industries such as lithium ion battery materials and special structural functional ceramic materials are basically realized by roller kiln. The kiln can be divided into four regions: preheating section, heating section, constant temperature section and cooling section. After the product is heated, it is transported to the tail end of the kiln for cooling treatment. The production hot air in the cooling section of the kiln is transported to the outdoor through the exhaust fan and exhaust pipe, causing energy waste.

[0003] The energy-saving roller kiln disclosed in patent publication No. CN203190791 U proposes that a wind guide pipe is provided on the kiln body, the initial end of the wind guide pipe is connected to the kiln tail air guide pipe, the terminal end of the wind guide pipe is connected to the combustion-supporting air pipe, a wind guide fan is provided on the wind guide pipe, a wind volume detection device and a temperature monitor are further provided at the inlet of the combustion-supporting air pipe, a combustion-supporting air control valve is provided on the combustion-supporting air pipe, and a rapid cooling air pipe is provided on the side wall of the tail part of the roller kiln body. Through the above improvements, the energy is reused, the heat emission is reduced, and the fuel combustion is reduced, achieving the effect of energy saving and emission reduction.

[0004] When guiding hot air, high-temperature hot air in the cooling section needs to be transported to the preheating section through external circulation. However, in the above-mentioned patent, the wind guide pipe directly leads to the preheating section, which will cause uneven heating of the roller at both ends of the preheating section, and thus affect the preheating effect of the product in the preheating section, resulting in uneven preheating of the product. Moreover, the above-mentioned patent is based on a natural gas kiln. Once it is changed to an electric kiln, the combustion-supporting preheating method cannot be used. Therefore, the present scheme proposes an energy-saving kiln to solve the above-mentioned problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an energy-saving kiln to solve the problems raised in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an energy-saving kiln, comprising a roller kiln body, one end of the roller kiln body is set as a preheating section, the other end of the roller kiln body is set as a cooling section, further comprising:

[0007] A first exhaust mechanism is provided at the exhaust end of the preheating section, and the first exhaust mechanism is used for exhausting impurity gas in the preheating section;

[0008] A second exhaust mechanism is arranged at the exhaust end of the cooling section, and is used for exhaust cooling of the cooling section.

[0009] A gas guiding mechanism is arranged at the exhaust end of the second exhaust mechanism and the gas inlet end of the preheating section, and is used for guiding hot gas at the cooling section into the preheating section through double-path staggered ventilation.

[0010] Preferably, the middle part of the roller kiln body is further provided with:

[0011] A temperature rising section is in communication with the material outlet end of the preheating section;

[0012] A constant temperature section is in communication with the material outlet end of the temperature rising section and the material inlet end of the cooling section.

[0013] Preferably, the top part of the temperature rising section and the constant temperature section is provided with an exhaust fan, which is used for exhausting the mist.

[0014] Preferably, the first exhaust mechanism comprises a first induced draft fan, which is arranged at the exhaust end of the preheating section.

[0015] Preferably, the second exhaust mechanism comprises a second induced draft fan, which is in communication with the exhaust end of the cooling section at the gas inlet end, and is in communication with the gas inlet end of the preheating section at the exhaust end through the gas guiding mechanism.

[0016] Preferably, the gas guiding mechanism comprises:

[0017] A gas guiding pipe, one end of which is in communication with the exhaust end of the second induced draft fan, and the other end of which is provided with two paths, and is in communication with the middle lower part of the roller of the preheating section through the two paths in a staggered manner, and the gas guiding pipe is close to the kiln wall of the roller kiln body;

[0018] A valve assembly is arranged at the two ends of the gas guiding pipe, and is used for on-off control of the two ends of the gas guiding pipe;

[0019] A heat preservation assembly is sleeved on the outer wall of the two paths of the gas guiding pipe, and is used for heat preservation when the gas guiding pipe is conveying gas.

[0020] Preferably, the valve assembly comprises:

[0021] A control valve is connected to one end of the gas guiding pipe in a penetrating manner, and is arranged close to the second induced draft fan;

[0022] An alternating valve part is connected to the other end of the gas guiding pipe in a penetrating manner, and is arranged close to the preheating section.

[0023] Preferably, the alternating valve part comprises a first switch valve and a second switch valve, which are respectively connected to two pipeline ends of the air guide pipeline, and the first switch valve and the second switch valve are used for staggered heating of the preheating section by alternating opening and closing.

[0024] Preferably, the heat preservation assembly comprises:

[0025] Heat preservation cotton, which is wrapped around the outer wall of the air guide pipeline;

[0026] A plurality of groups of the cable ties are wrapped around the outer wall of the middle part of the heat preservation cotton;

[0027] A plurality of groups of the binding belts are respectively wrapped around the two ends of the heat preservation cotton.

[0028] Preferably, the inner annular wall of the binding belt is provided with a plurality of puncture blocks, and the puncture blocks are connected to the outer wall of the heat preservation cotton away from one end of the binding belt.

[0029] The technical effects and advantages of the present application are as follows:

[0030] The air guide mechanism is connected to the air outlet end of the second air exhaust mechanism and the air inlet end of the preheating section, so that the cooling and preheating of the cooling section can be guided to the preheating section for heat utilization, thereby saving energy, and the air guide mechanism guides hot air into the preheating section through a double-path staggered air supply mode, so that the product preheating is more uniform under such staggered air supply preheating. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a front view of the whole principle of the present application.

[0032] Figure 2 It is a back view of the whole principle of the present application.

[0033] Figure 3 It is a structure diagram of the air guide mechanism of the present application.

[0034] Figure 4 It is a structure diagram of the binding belt of the present application.

[0035] In the figure: 1, roller kiln body; 101, preheating section; 102, temperature rising section; 103, constant temperature section; 104, cooling section; 2, first induced draft fan; 3, second induced draft fan; 4, air guide pipeline; 5, control valve; 6, alternating valve part; 601, first switch valve; 602, second switch valve; 7, heat preservation assembly; 701, heat preservation cotton; 702, cable tie; 703, binding belt; 704, puncture block; 8, air exhaust fan. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0037] In an embodiment, the utility model provides a kind of energy-saving kiln as shown in Figures 1-2 It comprises roller kiln body 1, one end of roller kiln body 1 is set as preheating section 101, the other end of roller kiln body 1 is set as cooling section 104;

[0038] The middle part of roller kiln body 1 is further provided with:

[0039] Heating section 102, the discharge end of preheating section 101 is communicated with heating section 102;

[0040] Constant temperature section 103, the discharge end of constant temperature section 103 is communicated with the discharge end of heating section 102, and the discharge end of constant temperature section 103 is communicated with the discharge end of cooling section 104.

[0041] The top of heating section 102 and constant temperature section 103 is provided with exhaust fan 8, and exhaust fan 8 is used for mist exhaust.

[0042] It should be noted that roller kiln body 1 is divided into preheating section 101, heating section 102, constant temperature section 103 and cooling section 104, and heating device and atmosphere adjusting device are installed in the hearth of roller kiln body 1, to realize the drying and calcination of product, and the mist generated in heating section 102 and constant temperature section 103 can be exhausted by the setting of exhaust fan 8.

[0043] In use, the furnace cavity temperature of preheating section 101 is 300-400 DEG C, the furnace cavity temperature of heating section 102 is 400-1000 DEG C, the furnace cavity temperature of constant temperature section 103 is 1000 DEG C, and the furnace cavity temperature of cooling section 104 is 200-300 DEG C.

[0044] Specifically, it further comprises:

[0045] First exhaust mechanism, the first exhaust mechanism is arranged at the exhaust end of preheating section 101, and the first exhaust mechanism is used for exhausting impurity gas in preheating section 101;

[0046] Specifically, the first exhaust mechanism comprises first induced draft fan 2, and the first induced draft fan 2 is arranged at the exhaust end of preheating section 101.

[0047] It should be noted that the air inlet end of the first induced draft fan 2 is connected with the exhaust port of the preheating section 101, and when the first induced draft fan 2 is started, the impurity gas with high particulate smoke generated in the preheating section 101 is discharged, so that the product processing is prevented from being polluted by the impurity gas.

[0048] The second exhaust mechanism is arranged at the exhaust end of the cooling section 104, and is used for cooling the exhaust gas of the cooling section 104.

[0049] Specifically, the second exhaust mechanism includes a second induced draft fan 3, and the air inlet end of the second induced draft fan 3 is connected with the exhaust end of the cooling section 104.

[0050] It should be noted that after the air inlet end of the second induced draft fan 3 is connected with the exhaust end of the cooling section 104, the gas replacement in the cooling section 104 can be accelerated by starting the second induced draft fan 3, the high-temperature gas in the cooling section 104 is extracted, and then the cold air outside the furnace is introduced, so that the cooling section 104 can be cooled more quickly.

[0051] In the second embodiment, the utility model provides a kind of energy-saving furnace as shown in Figure 3 The gas guide mechanism is arranged at the exhaust end of the second exhaust mechanism and the air inlet end of the preheating section 101, and is used for guiding the hot gas at the cooling section 104 into the preheating section 101 through double-path staggered ventilation. The exhaust end of the second induced draft fan 3 is connected with the air inlet end of the preheating section 101 through the gas guide mechanism.

[0052] Specifically, the gas guide mechanism includes:

[0053] One end of the gas guide pipeline 4 is connected with the exhaust end of the second induced draft fan 3, and the other end of the gas guide pipeline 4 is arranged as two paths. The other end of the gas guide pipeline 4 is connected with the lower middle position of the roller in the preheating section 101 through the two paths, and the gas guide pipeline 4 is close to the furnace wall of the roller kiln body 1.

[0054] It should be noted that through the guidance of the gas guide pipeline 4, the high-temperature gas in the cooling section 104 can be guided into the preheating section 101, so that the heat source in the cooling section 104 can be effectively utilized, the energy waste is reduced, and the air circulation in the preheating section 101 can be accelerated under the transportation of the second induced draft fan 3, the product energy replacement is accelerated, the preheating purpose is achieved, the air in the preheating section 101 flows quickly, the smoke impurities evaporated can be quickly discharged from the hearth, the time in the hearth is prevented from being too long, the hearth inner wall is prevented from being adsorbed, and the pollution probability is reduced.

[0055] When the air duct 4 is connected through the preheating section 101, the bottom and two sides of the furnace of the preheating section 101 are connected with the hot blast tuyere, the high-temperature gas of the cooling section 104 enters the preheating section 101 to heat the material, and the gas direction is not directly blown to the product itself or the saggar.

[0056] The valve assembly is arranged at both ends of the air duct 4, and is used for on-off control of both ends of the air duct 4.

[0057] Further, the valve assembly comprises:

[0058] The control valve 5 is connected through one end of the air duct 4, and is arranged close to the second induced draft fan 3.

[0059] The alternating valve part 6 is connected through the other end of the air duct 4, and is arranged close to the preheating section 101.

[0060] The alternating valve part 6 comprises a first switch valve 601 and a second switch valve 602, which are respectively connected through two pipeline ends of the air duct 4, and are used for staggered heating of the preheating section 101 by alternating opening and closing.

[0061] It should be noted that, by arranging the control valve 5 and the second control valve 6, the on-off of the air duct 4 can be controlled, so as to control the hot gas delivery from the cooling section 104 to the preheating section 101, and ensure the safety of the equipment during production and use. The air duct 4 is controlled by the control valve 5 to control the on-off of the air inlet. The air duct 4 after the control valve 5 is divided into two paths, and the output of the two paths is controlled by the first switch valve 601 and the second switch valve 602 respectively, so as to control the hot gas entering the preheating section 101. By arranging two paths, the hot gas entering the preheating section 101 is staggered in the middle lower position of the roller, so as to achieve the purpose of heating, so that the preheating of the product in the preheating section 101 is more uniform.

[0062] The heat preservation assembly 7 is sleeved on the outer wall of the two pipeline of the air duct 4, and is used for heat preservation when the air duct 4 delivers air.

[0063] Further, the heat preservation assembly 7 comprises:

[0064] The heat preservation cotton 701 is sleeved on the outer wall of the air duct 4, and also wraps the close part of the air duct 4 and the kiln wall. The heat of the part of the kiln wall composed of the refractory bricks enters the air duct 4 through heat conduction to play a heating role, and this part of heat can offset the loss of the internal heat of the air duct.

[0065] Cable ties 702, multiple sets of cable ties 702 are fitted on the outer wall of the middle part of the insulation cotton 701;

[0066] Binding straps 703, multiple sets of binding straps 703 are respectively fitted onto both ends of the thermal insulation cotton 701.

[0067] It should be noted that the insulation cotton 701 is made of ceramic fiber cotton material. After the insulation cotton 701 is cut and wrapped around the outer wall of the air duct 4, the two ends of the connection between the insulation cotton 701 and the air duct 4 can be tied tightly with the binding strap 703 first to ensure the connection position of the insulation cotton 701. Then, the middle area of ​​the insulation cotton 701 can be wrapped and gathered with the cable tie 702 to ensure that the insulation cotton 701 can be stably wrapped and fitted on the outer wall of the air duct 4.

[0068] Further, refer to Figure 4 As shown, the inner ring wall of the binding strap 703 is surrounded by multiple puncture blocks 704, and the end of the puncture block 704 away from the binding strap 703 is interlocked with the outer wall of the insulation cotton 701.

[0069] It should be noted that, through the structural design of the puncture block 704, the binding strap 703, after being fitted onto the outer wall of the insulation cotton 701, can adhere tightly to the insulation cotton 701 through puncture and compression. At the same time, the puncture and compression can bring the insulation cotton 701 closer to the air duct 4, thereby ensuring that the insulation cotton 701 is stably wrapped and fitted onto the outer wall of the air duct 4.

[0070] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving kiln, comprising a roller kiln body (1), one end of the roller kiln body (1) is provided as a preheating section (101), the other end of the roller kiln body (1) is provided as a cooling section (104), characterized in that, Also include: The first exhaust mechanism is arranged at the exhaust end of the preheating section (101), and the first exhaust mechanism is used for the exhaust of impurity gas in the preheating section (101); The second exhaust mechanism is arranged at the exhaust end of the cooling section (104), and the second exhaust mechanism is used for the exhaust cooling of the cooling section (104); The gas guide mechanism is arranged at the exhaust end of the second exhaust mechanism and the gas inlet end of the preheating section (101), and the gas guide mechanism is used for guiding the hot gas at the cooling section (104) into the preheating section (101) through double-way staggered ventilation.

2. An energy efficient furnace as claimed in claim 1, wherein, The middle part of the roller kiln body (1) is also provided with: The temperature rising section (102) is communicated with the discharge end of the preheating section (101); The constant temperature section (103) is communicated with the discharge end of the temperature rising section (102), and the discharge end of the constant temperature section (103) is communicated with the feed end of the cooling section (104).

3. An energy efficient furnace as claimed in claim 2, wherein, The top of the temperature rising section (102) and the constant temperature section (103) is provided with an exhaust fan (8), which is used for mist exhaust.

4. An energy efficient furnace as claimed in claim 1, wherein, The first exhaust mechanism includes a first induced draft fan (2), which is arranged at the exhaust end of the preheating section (101).

5. An energy efficient furnace as claimed in claim 1, wherein, The second exhaust mechanism includes a second induced draft fan (3), the gas inlet end of the second induced draft fan (3) is communicated with the exhaust end of the cooling section (104), and the exhaust end of the second induced draft fan (3) is communicated with the gas inlet end of the preheating section (101) through the gas guide mechanism.

6. An energy efficient furnace as claimed in claim 5, wherein, The gas guide mechanism includes: The gas guide pipeline (4) is communicated with the exhaust end of the second induced draft fan (3), the other end of the gas guide pipeline (4) is provided with two-way pipeline, the other end of the gas guide pipeline (4) is communicated with the lower middle position of the roller of the preheating section (101) through the two-way pipeline, and the gas guide pipeline (4) is close to the kiln wall of the roller kiln body (1); The valve assembly is arranged at the two ends of the gas guide pipeline (4), and the valve assembly is used for on-off control of the two ends of the gas guide pipeline (4); The heat preservation assembly (7) is sleeved on the outer wall of the two-way pipeline of the gas guide pipeline (4), and the heat preservation assembly (7) is used for heat preservation when the gas guide pipeline (4) is conveying gas.

7. An energy efficient furnace as claimed in claim 6, wherein The valve assembly includes: The control valve (5) is connected to one end of the gas guide pipeline (4), and the control valve (5) is arranged close to the second induced draft fan (3); The alternating valve part (6) is connected to the other end of the gas guide pipeline (4), and the alternating valve part (6) is arranged close to the preheating section (101).

8. An energy efficient furnace as claimed in claim 7, wherein, The alternating valve part (6) includes a first switch valve (601) and a second switch valve (602), the first switch valve (601) and the second switch valve (602) are respectively connected to the two-way pipeline end of the gas guide pipeline (4), and the first switch valve (601) and the second switch valve (602) are used for staggered heating of the preheating section (101) by alternating opening and closing.

9. An energy efficient furnace as claimed in claim 6 wherein, The heat preservation assembly (7) includes: Insulating cotton (701) is wrapped around the outer wall of the gas duct (4) and also wraps the part of the gas duct (4) that is in close contact with the kiln wall. Cable ties (702), multiple sets of the cable ties (702) are sleeved on the outer wall of the middle part of the thermal insulation cotton (701); Binding straps (703), multiple sets of binding straps (703) are respectively fitted onto both ends of the thermal insulation cotton (701).

10. An energy efficient furnace as claimed in claim 9, wherein, The inner ring wall of the binding strap (703) is provided with a plurality of puncture blocks (704), and the end of the puncture block (704) away from the binding strap (703) is interlocked with the outer wall of the insulation cotton (701).

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