Dust fall device for roller kiln

Abstract

The utility model discloses a roller kiln dust fall device, which belongs to the technical field of dust fall, and comprises a transportation device and a kiln body arranged above the transportation device, a flue is arranged in the kiln body, a flue gas cover is fixedly arranged on the upper end face of the kiln body, the inner end of the flue is communicated with a heating space of the kiln body, and the outer end of the flue is communicated with the interior of the flue gas cover. And the flue gas cover is communicated with the flue gas pretreatment device. Due to the arrangement of the flue gas pretreatment device, during use, flue gas generated by the kiln body enters the flue gas cover and then enters the flue gas pretreatment device, dust particles in the flue gas are preliminarily separated by the flue gas pretreatment device, and meanwhile, the temperature of the flue gas is reduced; the procedure of reducing the temperature of the flue gas is omitted, and the dust removal efficiency of the flue gas treatment device is improved.

Description

Technical Field

[0001] The utility model relates to a dust reduction device, in particular to a dust reduction device for a roller kiln. Background Art

[0002] A roller hearth kiln, also known as an archless kiln, is a tunnel kiln with a long and narrow cross-section. It consists of a series of parallel rollers that cross the cross-section of the kiln's working channel. Products are placed on the rollers and transported into the kiln as the rollers rotate, completing the firing process inside the kiln.

[0003] Since the green bodies fired in the roller kiln are made of powdered materials, the flue gas generated by the roller kiln during the firing process often contains a large amount of dust particles. The flue gas discharged from the roller kiln needs to be subjected to dust reduction and temperature reduction treatment to meet the standards for atmospheric emissions. The existing flue gas treatment device of the roller kiln uses a composite process such as desulfurization-denitrification-dust removal to comprehensively solve the problem from the two aspects of energy consumption and environmental protection. However, before the flue gas discharged from the roller kiln enters the flue gas treatment device, there is no flue gas pretreatment device, which increases the processing burden on the flue gas treatment device, reduces the efficiency of the flue gas treatment device in treating the flue gas, and shortens the maintenance cycle of the flue gas treatment device.

[0004] After searching, the patent number is: CN110953879A, which provides a roller kiln, including a kiln body, in which a heating rod and a roller for conveying materials are provided. The side wall of the kiln body is provided with a plurality of air inlet holes connected to the inner cavity of the kiln body, and the top of the kiln body is provided with a plurality of exhaust holes connected to the inner cavity of the kiln body, and the outlet end of the exhaust hole is connected to the exhaust gas treatment device.

[0005] In the above scheme, the flue gas discharged from the kiln body enters the exhaust gas treatment device through the exhaust hole and undergoes a composite process of desulfurization, denitrification and dust removal. However, there is no flue gas pretreatment device before the flue gas discharged from the roller kiln enters the flue gas treatment device, which increases the processing burden on the flue gas treatment device, reduces the efficiency of the flue gas treatment device in treating the flue gas, and shortens the maintenance cycle of the flue gas treatment device. Utility Model Content

[0006] The purpose of the utility model is to provide a roller kiln dust reduction device, which has the advantage of pre-processing the flue gas discharged from the kiln body, and effectively solves the problems of heavy load and low flue gas processing efficiency of the flue gas treatment device in the prior art.

[0007] The utility model adopts the following technical solution: a roller kiln dust reduction device, comprising a transport device and a kiln body arranged above the transport device, a flue is opened inside the kiln body, a fume hood is fixedly arranged on the upper end surface of the kiln body, the inner end of the flue is communicated with the heating space of the kiln body, the outer end of the flue is communicated with the interior of the fume hood, and the fume hood is connected to a fume pretreatment device.

[0008] Further, the flue gas pretreatment device includes a first reduced-diameter joint communicated with the flue gas hood, and a parallel pipe fixedly arranged on the right side surface of the first reduced-diameter joint. A second reduced-diameter joint is fixedly arranged on the right side surface of the parallel pipe. A plurality of dust collection boxes communicated with the inside of the parallel pipe are fixedly arranged at the bottom of the outer surface of the parallel pipe. A dust discharge valve is fixedly arranged at the lower end surface of the dust collection box.

[0009] Further, a baffle group is fixedly arranged on the inner side wall of the parallel pipe above the dust collection box. The baffle group is composed of a plurality of baffles fixedly arranged on the inner side wall of the parallel pipe along the left-right direction. Each baffle is provided with a notch, and the notches of adjacent baffles are arranged in a vertically staggered manner.

[0010] Further, a plurality of dust collection boxes can be arranged along the left-right direction according to the length of the parallel pipe, and a group of baffle groups are arranged above each dust collection box.

[0011] Further, a communicating pipe is fixedly arranged between the flue gas hood and the first reduced-diameter joint, and the inside of the flue gas hood is communicated with the left end of the first reduced-diameter joint through the communicating pipe.

[0012] Further, a flue damper assembly is arranged at the left part of the kiln body, and the flue damper assembly is used for sealing the left end of the heating space of the kiln body.

[0013] Further, the flue damper assembly includes a flue damper slidably arranged in the left part of the kiln body along the up-down direction, and a fixedly arranged hydraulic telescopic rod. The output end of the hydraulic telescopic rod is fixedly arranged with the flue damper.

[0014] Further, the conveying device includes a base. A through groove is opened on the upper end surface of the base along the left-right direction. A plurality of driving rollers are arranged in the through groove of the base along the left-right direction, and each driving roller is rotatably connected with the base.

[0015] Further, a plurality of support columns are fixedly arranged between the lower end surface of the kiln body and the inner bottom wall of the through groove of the base, and each support column passes through the gap between two adjacent driving rollers corresponding to it.

[0016] Further, a left support and a right support are fixedly arranged on the outer surface of the base. The fixed end of the hydraulic telescopic rod is fixedly arranged with the lower end surface of the top plate of the left support, and the second reduced-diameter joint is fixedly arranged with the right support through a fixing plate; a driving device is also arranged on the base, and the driving device drives each driving roller to rotate synchronously and in the same direction.

[0017] 1. The utility model is provided with a flue gas pretreatment device. When in use, the flue gas generated by the kiln body enters the flue gas hood and then enters the flue gas pretreatment device. The flue gas pretreatment device preliminarily separates the dust particles in the flue gas and reduces the temperature of the flue gas at the same time. Since the flue gas has undergone the pretreatment of primary dust removal and temperature reduction, the process of reducing the temperature of the flue gas is saved, and the dust removal efficiency of the flue gas treatment device is improved.

[0018] 2. The utility model is provided with a first reduced-diameter joint, a parallel pipe and a second reduced-diameter joint. When the device is in use, the flue gas in the flue gas hood enters the first reduced-diameter joint. Since the cross-sectional area of the first reduced-diameter joint suddenly becomes larger, the flow rate of the flue gas decreases, and the dust particles in the flue gas settle downward under the action of their own gravity and then fall into the dust collection box below the parallel pipe, achieving the purpose of separating the dust particles in the flue gas; in addition, when the flue gas flows through the first reduced-diameter joint from the flue gas hood, its volume expands, the pressure decreases, and the temperature decreases, thus achieving the purpose of reducing the temperature of the flue gas, and realizing the purpose of dust removal and temperature reduction of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall three-dimensional structure schematic diagram of the utility model;

[0020] Figure 2 is the three-dimensional structure schematic diagram of the left bracket in the utility model;

[0021] Figure 3 is the front view structure schematic diagram of the utility model;

[0022] Figure 4 is the three-dimensional internal structure schematic diagram of the parallel pipe in the utility model;

[0023] Figure 5 is the three-dimensional structure schematic diagram of the baffle in the utility model;

[0024] Figure 6 is the internal structure schematic diagram of the parallel pipe in the utility model;

[0025] Figure 7 is the three-dimensional structure schematic diagram of the kiln body in the utility model;

[0026] Figure 8 is the three-dimensional internal structure schematic diagram of the kiln body in the utility model.

[0027] In the figure, 1. Kiln body; 2. Flue; 3. Flue gas hood; 4. First reduced-diameter joint; 5. Parallel pipe; 6. Second reduced-diameter joint; 7. Dust collection box; 8. Ash discharge valve; 9. Baffle; 10. Notch; 11. Connecting pipe; 12. Flue damper; 13. Hydraulic telescopic rod; 14. Base; 15. Through groove; 16. Driving roller; 17. Support column; 18. Left bracket; 19. Right bracket. Detailed implementation mode

[0028] Please refer to Figure 1-8 , and the present utility model will be described in detail below in conjunction with the accompanying drawings and embodiments:

[0029] The dust reduction device of the roller hearth kiln described in the present utility model includes a transportation device and a kiln body 1 arranged above the transportation device. A flue 2 is opened inside the kiln body 1. A smoke hood 3 is fixedly arranged on the upper end surface of the kiln body 1. The inner end of the flue 2 is communicated with the heating space of the kiln body 1, and the outer end of the flue 2 is communicated with the inside of the smoke hood 3. The smoke hood 3 is communicated with a flue gas pretreatment device, and the flue gas pretreatment device is used to separate dust particles in the flue gas and reduce the temperature of the flue gas, so as to prepare for the next step of efficient dust removal of the flue gas.

[0030] In this embodiment, the flue gas pretreatment device includes a first reducing joint 4 communicated with the smoke hood 3 and a parallel pipe 5 fixedly arranged on the right side surface of the first reducing joint 4. A second reducing joint 6 is fixedly arranged on the right side surface of the parallel pipe 5. A plurality of dust collection boxes 7 communicated with the inside of the parallel pipe 5 are fixedly arranged at the bottom of the outer surface of the parallel pipe 5. A dust discharge valve 8 is fixedly arranged on the lower end surface of the dust collection box 7; the right end of the second reducing joint 6 is communicated with the next-stage flue gas treatment device; during use, the flue gas in the smoke hood 3 enters the first reducing joint 4. Since the cross-sectional area of the first reducing joint 4 suddenly becomes larger, the flow velocity of the flue gas decreases, and the dust particles in the flue gas settle downward under the action of their own gravity, and then fall into the dust collection box 7 below the parallel pipe 5, so as to achieve the purpose of separating the dust particles in the flue gas. The dust in the dust collection box 7 is regularly discharged through the dust discharge valve 8; in addition, when the flue gas flows through the first reducing joint 4 from the smoke hood 3, its volume expands, the pressure decreases, and the temperature decreases, similar to the principle of the expansion valve in the refrigeration system, so as to achieve the purpose of reducing the temperature of the flue gas. Then, the flue gas that has undergone gravity separation and temperature reduction is discharged from the second reducing joint 6 and enters the next-stage flue gas treatment device. Since the flue gas has undergone primary dust removal and temperature reduction pretreatment, the process of reducing the temperature of the flue gas is saved, and the dust removal efficiency of the flue gas treatment device is improved; when finally discharged to the outside, the temperature of the flue gas should meet the environmental protection requirements of the flue gas emission temperature standard; according to the national standard, the waste gas incineration temperature requirement is generally between 850 °C and 1100 °C; if the temperature reduction of the flue gas by the flue gas pretreatment device does not meet the standard, although the flue gas treatment device still needs to reduce the temperature of the flue gas, since the flue gas has undergone primary temperature reduction in the flue gas pretreatment device, the time for temperature reduction is still saved, and the efficiency of temperature reduction is improved.

[0031] In order to further improve the effect of separating dust particles when the flue gas flows in the parallel pipes 5, in this embodiment, a baffle group is fixedly arranged on the inner side wall of the parallel pipe 5 above the dust collection box 7. The baffle group is composed of a plurality of baffles 9 fixedly arranged on the inner side wall of the parallel pipe 5 in the left-right direction. Each baffle 9 is provided with a notch 10, and the notches 10 of adjacent baffles 9 are arranged in a vertical and horizontal staggered manner. During use, when the flue gas is discharged from the first reducing joint 4 and enters the parallel pipe 5, it is blocked by the baffle 9, and the flue gas further decelerates, improving the effect of separating dust particles inside the flue gas. The flue gas enters the right side of the baffle 9 through the notch 10 of the baffle 9. Since the notches 10 of two adjacent baffles 9 are arranged in a vertical and horizontal staggered manner, the flue gas flows upward or downward and enters the notch 10 of the adjacent baffle 9 on the right side. In this way, the flue gas forms a serpentine flow route among the baffles 9, extending the flow route of the flue gas, enabling the dust in the flue gas to have sufficient time to settle, and improving the separation effect of the dust particles inside the flue gas.

[0032] In this embodiment, according to the length of the parallel pipe 5, a plurality of dust collection boxes 7 can be arranged in the left-right direction. A set of baffle groups are arranged above each dust collection box 7. When the flue gas flows through the parallel pipe 5, the dust particles are settled and separated multiple times, improving the separation effect of the flue gas.

[0033] In this embodiment, a connecting pipe 11 is fixedly arranged between the flue gas hood 3 and the first reducing joint 4. The inside of the flue gas hood 3 is communicated with the left end of the first reducing joint 4 through the connecting pipe 11. During use, the transport device conveys the green body into the kiln body 1 from left to right. The kiln body 1 heats the green body, and the flue gas enters the flue gas hood 3 from the flue 2 and enters the first reducing joint 4 through the connecting pipe 11.

[0034] In this embodiment, a flue damper assembly is arranged at the left part of the kiln body 1. After the transport device conveys a batch of green bodies into the kiln body 1, the flue damper assembly seals the left end of the heating space inside the kiln body 1 to prevent heat from escaping. When the green body is heated, the flue damper 12 assembly is opened, and the transport device conveys the next batch of green bodies into the kiln body 1 from the left end of the kiln body 1 for heating.

[0035] In this embodiment, the flue damper assembly includes a flue damper 12 slidably arranged in the up-down direction at the left part of the kiln body 1, and a fixedly arranged hydraulic telescopic rod 13. The output end of the hydraulic telescopic rod 13 is fixedly arranged with the flue damper 12. The hydraulic telescopic rod 13 pushes the flue damper 12 to lift upward to open the left end of the heating space inside the kiln body 1 or move downward to close the left end of the heating space inside the kiln body 1.

[0036] In the present utility model, the transportation device includes a base 14. A through groove 15 is formed in the upper end surface of the base 14 in the left-right direction. A plurality of driving rollers 16 are arranged in the through groove 15 of the base 14 in the left-right direction. Each driving roller 16 is rotatably connected to the base 14. A plurality of support columns 17 are fixedly arranged between the lower end surface of the kiln body 1 and the inner bottom wall of the through groove 15 of the base 14. Each support column 17 passes through the gap between two adjacent driving rollers 16. A left support 18 and a right support 19 are fixedly arranged on the outer surface of the base 14. The fixed end of the hydraulic expansion link 13 is fixedly arranged on the lower end surface of the top plate of the left support 18. The second reduced-diameter joint 6 is fixedly arranged on the right support 19 through a fixing plate. A driving device is further arranged on the base 14, and the driving device drives each driving roller 16 to rotate synchronously and in the same direction. During use, the hydraulic expansion link 13 pushes the flue damper 12 downward, so that the flue damper 12 passes through the gap between two adjacent driving rollers 16. Then, the lower end surface of the flue damper 12 contacts the inner bottom wall of the through groove 15 of the base 14, achieving the purpose of sealing the left end of the internal heating space of the kiln body 1. The driving device drives each driving roller 16 to rotate synchronously and in the same direction, achieving the purpose of driving the green body placed above the driving rollers 16 to move from left to right. The working principle of the driving device driving the driving rollers 16 to rotate synchronously and in the same direction is the prior art in this field and will not be elaborated here.

[0037] The working principle of the present utility model: During use, first place the green body on the driving roller 16 on the left side of the kiln body 1. Then, drive each driving roller 16 to rotate synchronously and in the same direction through the driving device, driving the green body placed above the driving rollers 16 to move from left to right. After the transportation device transports a batch of green bodies into the kiln body 1, the hydraulic expansion link 13 pushes the flue damper 12 downward to seal the left end of the internal heating space of the kiln body 1, preventing heat from escaping. When the green body is heated, the flue damper 12 assembly is opened, and the transportation device transports the next batch of green bodies into the kiln body 1 from the left end for heating. During the operation of the kiln body 1, the flue gas enters the flue gas hood 3 from the flue 2, and then enters the first reduced-diameter joint 4 through the connecting pipe 11. Since the cross-sectional area of the first reduced-diameter joint 4 suddenly increases, the flow rate of the flue gas decreases, and the dust particles in the flue gas settle downward under the action of their own gravity, and then fall into the dust collection box 7 below the parallel pipe 5, achieving the purpose of separating the dust particles in the flue gas. In addition, when the flue gas flows through the first reduced-diameter joint 4 from the flue gas hood 3, its volume expands, the pressure decreases, and the temperature decreases, achieving the purpose of reducing the temperature of the flue gas. The baffle 9 groups arranged in the parallel pipe 5 improve the separation effect of the dust particles in the flue gas.

Claims

1. A dust reduction device for a roller hearth kiln, comprising a conveying device and a kiln body (1) arranged above the conveying device, characterized in that: A flue (2) is provided inside the kiln body (1). A smoke hood (3) is fixedly arranged on the upper end face of the kiln body (1). The inner end of the flue (2) communicates with the heating space of the kiln body (1), and the outer end of the flue (2) communicates with the inside of the smoke hood (3). The smoke hood (3) is communicated with a flue gas pretreatment device; The flue gas pretreatment device includes a first reduced-diameter joint (4) communicated with the smoke hood (3), and a parallel pipe (5) fixedly arranged on the right side surface of the first reduced-diameter joint (4). A second reduced-diameter joint (6) is fixedly arranged on the right side surface of the parallel pipe (5). A plurality of dust collection boxes (7) communicated with the inside of the parallel pipe (5) are fixedly arranged on the bottom of the outer surface of the parallel pipe (5). A dust discharge valve (8) is fixedly arranged on the lower end face of the dust collection box (7); On the inner side wall of the parallel pipe (5) above the dust collection box (7), a baffle group is fixedly arranged. The baffle group is composed of a plurality of baffles (9) fixedly arranged on the inner side wall of the parallel pipe (5) along the left-right direction. Each baffle (9) is provided with a notch (10), and the notches (10) of adjacent baffles (9) are arranged in a vertically staggered manner.

2. The dust reduction device for roller hearth kiln according to claim 1, characterized in that: According to the length of the parallel pipe (5), a plurality of dust collection boxes (7) can be arranged along the left-right direction, and a group of baffle groups are arranged above each dust collection box (7).

3. The dust reduction device for roller hearth kiln according to claim 1, wherein: A connecting pipe (11) is fixedly arranged between the smoke hood (3) and the first reduced-diameter joint (4). The inside of the smoke hood (3) is communicated with the left end of the first reduced-diameter joint (4) through the connecting pipe (11).

4. The dust reduction device for roller hearth kiln according to claim 1, characterized in that: A flue gate assembly is arranged on the left part of the kiln body (1), and the flue gate assembly is used to seal the left end of the heating space of the kiln body (1).

5. The dust reduction device for roller hearth kiln according to claim 4, characterized in that: The flue gate assembly includes a flue gate (12) slidably arranged in the left part of the kiln body (1) along the up-down direction, and a fixedly arranged hydraulic telescopic rod (13). The output end of the hydraulic telescopic rod (13) is fixedly arranged with the flue gate (12).

6. The dust reduction device for roller hearth kiln according to claim 1, wherein: The conveying device includes a base (14). A through groove (15) is opened on the upper end face of the base (14) along the left-right direction. A plurality of driving rollers (16) are arranged in the through groove (15) of the base (14) along the left-right direction, and each driving roller (16) is rotatably connected with the base (14).

7. The dust reduction device for roller hearth kiln according to claim 6, characterized in that: A plurality of support columns (17) are fixedly arranged between the lower end face of the kiln body (1) and the inner bottom wall of the through groove (15) of the base (14), and each support column (17) passes through the gap between two adjacent driving rollers (16).

8. The dust reduction device for roller hearth kiln according to claim 7, characterized in that: A left support (18) and a right support (19) are fixedly arranged on the outer surface of the base (14). The fixed end of the hydraulic telescopic rod (13) is fixedly arranged with the lower end face of the top plate of the left support (18). The second reduced-diameter joint (6) is fixedly arranged with the right support (19) through a fixing plate; A driving device is also arranged on the base (14), and the driving device drives each driving roller (16) to rotate synchronously and in the same direction.

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