Tail gas treatment device of external heating type airtight continuous rotary kiln

Abstract

The invention discloses a tail gas treatment device of an external heating type airtight continuous rotary kiln, which comprises a heating part for heating and mixing materials, and the heating part is further connected with a tail gas treatment assembly. The tail gas treatment assembly comprises a tail gas treatment device used for treating tail gas, a dust removal device used for treating dust in the tail gas and a dust collection device used for collecting the dust, an air pump used for pumping out the tail gas is installed in the tail gas treatment device, and the exhaust end of the tail gas treatment device communicates with the dust removal device; the dust removal device is further connected with a dust collection device through a flow guide pipe, the external heating type airtight continuous rotary kiln and the tail gas treatment device are achieved, meanwhile, tail gas is treated, gas emission is more environmentally friendly, and pollution of the tail gas to the environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of rotary kilns, and in particular to a tail gas treatment device of an externally heated airtight continuous rotary kiln. Background Art

[0002] A rotary kiln is a rotating calcining kiln, which belongs to the category of building materials equipment. According to the materials it processes, rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns. Cement kilns are mainly used to calcine cement clinker, and are divided into two categories: dry process cement kilns and wet process cement kilns.

[0003] like Figure 1 As shown, the commonly used rotary kiln is mainly composed of a cylinder, a heating device, a transmission device, a supporting device, a wheel device, an inlet bin and an outlet bin. The raw materials are put into the kiln cylinder from the high end of the cylinder with a certain inclination at the kiln head. Due to the inclination and slow rotation of the cylinder, the raw materials produce a compound motion of rolling along the circumferential direction and moving from the high end to the low end along the axial direction. The raw materials go through the process of decomposition and firing in the cylinder. After the fired products are discharged from the low end of the cylinder at the kiln tail, they enter the cooling device. The heating device wraps the heating section of the cylinder as a whole, and heats the heating section of the cylinder according to the temperature curve in different zones and temperatures. The heat emitted by the raw materials causes the raw materials to be calcined into products. The hot air formed in the process of heat exchange with the materials is discharged into the atmosphere through the smoke exhaust duct located at the kiln head or kiln tail.

[0004] Chinese patent CN203132332U discloses a rotary kiln cylinder for material reduction reaction, wherein a lifting part is provided on the inner wall of the rotary kiln cylinder, and the lifting part protrudes toward the inside of the rotary kiln cylinder and extends in the direction from the kiln head of the rotary kiln cylinder for feeding to the kiln tail of the rotary kiln cylinder for discharging. The present invention also provides a rotary kiln for producing vanadium oxide, which includes the rotary kiln cylinder for material reduction reaction; however, the exhaust gas of the device is directly emptied, and many raw materials will produce a lot of harmful gases and dust during the sintering process, and direct emptying will cause huge pollution to the environment. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tail gas treatment device for an externally heated airtight continuous rotary kiln, comprising a heating portion for heating and mixing materials, the heating portion being further connected to a tail gas treatment assembly, the tail gas treatment assembly comprising a tail gas treatment device for treating tail gas, a dust removal device for treating dust in the tail gas, and a dust collection device for collecting dust, an air pump for extracting tail gas being installed in the tail gas treatment device, the exhaust end of the tail gas treatment device being connected to the dust removal device, and the dust removal device being further connected to the dust collection device via a guide pipe.

[0007] As a further solution of the present invention: the heating part includes a heating part inlet bin, a heating part cylinder and a heating part outlet bin, one end of the heating part cylinder is provided with a heating part inlet bin for feeding, the other end of the heating part cylinder is provided with a heating part outlet bin for discharging exhaust gas, a heating part supporting device is provided in the middle of the heating part cylinder, the heating part cylinder and the heating part supporting device are rotatably connected, and a heating part transmission device is also provided on the heating part cylinder, the heating part cylinder and the heating part transmission device are rotatably connected.

[0008] As a further solution of the present invention: the heating part transmission device includes a driving motor and a driving gear, and the outer wall of the heating part cylinder is provided with a driven gear, and the driving gear and the driven gear are meshed.

[0009] As a further solution of the present invention: a heating part airtight device is provided at the contact position between the heating part inlet bin and the heating part cylinder, a heating part airtight device is also provided at the contact position between the heating part outlet bin and the heating part cylinder, and an atmosphere injection device is also connected to the heating part inlet bin.

[0010] As a further solution of the present invention: a heating part stop wheel device for limiting the heating part cylinder is provided below the heating part support device, the heating part outlet bin is respectively connected to a tar discharge device for discharging tar, a bulk material recovery device for recovering bulk materials and a cooling device, the bulk material recovery device is connected to the heating part inlet bin through a recovery pipe, and a bulk material rejecting device for rejecting bulk materials is also provided between the heating part outlet bin and the bulk material recovery device, and the bulk material rejecting device is respectively connected to the heating part outlet bin and the bulk material recovery device.

[0011] It also includes a feeding device for supplying materials and a cooling device for cooling materials. The feeding device is connected to the heating part through a flow guide pipe, and the heating part and the cooling device are also connected through the flow guide pipe.

[0012] As a further solution of the present invention: the cooling device includes a cooling part inlet bin, a cooling part cylinder and a cooling part outlet bin, the cooling part inlet bin is installed at one end of the cooling part cylinder, and the cooling part outlet bin is installed at the other end of the cooling part cylinder, and the cooling part airtight devices are installed at the contact positions between the cooling part cylinder and the cooling part inlet bin and the cooling part outlet bin.

[0013] As a further solution of the present invention: the cooling part cylinder is also rotatably connected to a cooling part supporting device for supporting the cooling part cylinder, a cooling part stop wheel device for limiting the cooling part cylinder is provided below the cooling part supporting device, the cooling part cylinder is also connected to a cooling part transmission device for driving the cooling part cylinder, the structure of the cooling part transmission device is the same as that of the heating part transmission device, and the cooling part outlet bin is connected to a product collecting device for collecting products.

[0014] In summary, the beneficial effects of the present invention are: realizing an externally heated airtight continuous rotary kiln and an exhaust gas treatment device, and treating the exhaust gas at the same time, making the gas emission more environmentally friendly and reducing the pollution of the exhaust gas to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a rotary kiln in the background technology.

[0016] Figure 2 It is a schematic diagram of the structure of the invention.

[0017] Figure 3 The invention is a process flow chart.

[0018] In the figure: 1-feeding device, 2-heating section entrance bin, 3-heating section airtight device, 4-heating section supporting device, 5-heating section, 6-heating section cylinder, 7-heating section outlet bin, 8-tar discharge device, 9-heating section blocking wheel device, 10-heating section transmission device, 11-large block material removal device, 12-atmosphere injection device, 13-large block material recovery device, 14-cooling section entrance bin, 15-cooling section airtight device, 16-cooling section supporting device, 17-cooling device, 18-cooling section cylinder, 19-cooling section outlet bin, 20-cooling section blocking wheel device, 21-cooling section transmission device, 22-product collection device, 23-exhaust gas treatment device, 24-dust removal device, 25-dust collection device. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figures 2-3 As shown, in an embodiment of the present invention, an exhaust gas treatment device of an externally heated airtight continuous rotary kiln, or an externally heated airtight continuous rotary kiln, comprises a feeding device 1 for supplying materials, a heating portion 5 for heating and mixing the materials, and a cooling device 17 for cooling the materials, wherein the feeding device 1 and the heating portion 5 are connected via a flow guide pipe, and the heating portion 5 and the cooling device 17 are also connected via a flow guide pipe, and the heating portion 5 is also connected to an exhaust gas treatment component;

[0022] The tail gas treatment assembly includes a tail gas treatment device 23 for treating tail gas, a dust removal device 24 for treating dust in the tail gas, and a dust collection device 25 for collecting dust. An air pump for extracting tail gas is installed in the tail gas treatment device 23. A tail gas filter is installed in the tail gas treatment device 23. The setting of the tail gas filter realizes the rapid treatment of tail gas. The exhaust end of the tail gas treatment device 23 is connected to the dust removal device 24.

[0023] In this embodiment, the dust removal device 24 is an electrostatic dust removal net, and the dust removal device 24 is externally connected to alternating current. The setting of the dust removal device 24 realizes rapid dust removal of exhaust gas and ensures the cleanliness of exhaust gas. The dust removal device 24 is also provided with an exhaust gas outlet, and the dust removal device 24 is also connected to a dust collection device 25 through a guide pipe.

[0024] Example 2

[0025] like Figures 2-3 As shown, in an embodiment of the present invention, an exhaust gas treatment device of an externally heated airtight continuous rotary kiln, or an externally heated airtight continuous rotary kiln, comprises a feeding device 1 for supplying materials, a heating portion 5 for heating and mixing the materials, and a cooling device 17 for cooling the materials, wherein the feeding device 1 and the heating portion 5 are connected via a flow guide pipe, and the heating portion 5 and the cooling device 17 are also connected via a flow guide pipe, and the heating portion 5 is also connected to an exhaust gas treatment component;

[0026] The heating part 5 includes a heating part inlet bin 2, a heating part cylinder 6 and a heating part outlet bin 7. One end of the heating part cylinder 6 is provided with a heating part inlet bin 2 for feeding, and the other end of the heating part cylinder 6 is provided with a heating part outlet bin 7 for discharging tail gas. A heating part support device 4 is provided in the middle of the heating part cylinder 6. The heating part cylinder 6 and the heating part support device 4 are rotatably connected. A heating part transmission device 10 is also provided on the heating part cylinder 6. The heating part cylinder 6 and the heating part transmission device 10 are rotatably connected. The heating part transmission device 10 includes a driving motor and a driving gear. A driven gear is provided on the outer wall of the heating part cylinder 6. The driving gear and the driven gear are meshed.

[0027] The driving motor can drive the driving gear to rotate, so that the driving gear drives the driven gear and the heating part cylinder 6 to rotate, so as to achieve uniform mixing of the gas and raw materials in the heating part cylinder 6, and also ensure uniform and rapid heating of the gas and raw materials, and at the same time drive the raw materials in the heating part cylinder 6 to move toward the heating part outlet bin 7, so as to achieve the burning of the raw materials. The exhaust gas after burning is discharged into the exhaust gas treatment device 23 through the smoke exhaust pipe. The exhaust gas treatment device 23 performs combustion treatment on the exhaust gas to remove harmful gases and asphalt in the exhaust gas, and then the exhaust gas enters the dust removal device 24, and the dust removal device 24 recovers the dust, and then the exhaust gas is discharged through the dust removal device 24;

[0028] A heating part airtight device 3 is provided at the contact position between the heating part inlet bin 2 and the heating part cylinder 6. The setting of the heating part airtight device 3 ensures the airtightness of the heating part cylinder 6 and avoids the leakage of tail gas.

[0029] The heating part inlet bin 2 is also connected to an atmosphere injecting device 12, which can inject one or more gases into the heating part cylinder 6 respectively, and can also inject a variety of mixed gases, with a wider range of selectivity, meeting the production of products with different requirements;

[0030] The contact position between the heating part outlet bin 7 and the heating part cylinder 6 is also provided with a heating part airtight device 3;

[0031] A heating part stop wheel device 9 for limiting the heating part cylinder 6 is provided below the heating part support device 4, and the heating part outlet bin 7 is respectively connected with a tar discharge device 8 for discharging tar, a bulk material recovery device 13 for recovering bulk materials and a cooling device 17, the bulk material recovery device 13 is connected with the heating part inlet bin 2 through a recovery pipe, and a bulk material rejection device 11 for rejecting bulk materials is further provided between the heating part outlet bin 7 and the bulk material recovery device 13, the bulk material rejection device 11 is respectively connected with the heating part outlet bin 7 and the bulk material recovery device 13, the setting of the bulk material recovery device 13 avoids blockage of the outlet bin and waste of resources, and the setting of the tar discharge device 8 can effectively reduce the pollution of tar to the raw materials.

[0032] Example 3

[0033] like Figures 2-3 As shown, in an embodiment of the present invention, an exhaust gas treatment device of an externally heated airtight continuous rotary kiln, or an externally heated airtight continuous rotary kiln, comprises a feeding device 1 for supplying materials, a heating portion 5 for heating and mixing the materials, and a cooling device 17 for cooling the materials, wherein the feeding device 1 and the heating portion 5 are connected via a flow guide pipe, and the heating portion 5 and the cooling device 17 are also connected via a flow guide pipe, and the heating portion 5 is also connected to an exhaust gas treatment component;

[0034] The tail gas treatment assembly includes a tail gas treatment device 23 for treating tail gas, a dust removal device 24 for treating dust in the tail gas, and a dust collection device 25 for collecting dust. An air pump for extracting tail gas is installed in the tail gas treatment device 23. A tail gas filter is installed in the tail gas treatment device 23. The setting of the tail gas filter realizes the rapid treatment of tail gas. The exhaust end of the tail gas treatment device 23 is connected to the dust removal device 24.

[0035] In this embodiment, the dust removal device 24 is an electrostatic dust removal net, and the dust removal device 24 is externally connected to an alternating current. The setting of the dust removal device 24 realizes rapid dust removal of the exhaust gas and ensures the cleanliness of the exhaust gas. The dust removal device 24 is also provided with an exhaust gas outlet, and the dust removal device 24 is also connected to a dust collection device 25 through a guide pipe;

[0036] The heating part 5 includes a heating part inlet bin 2, a heating part cylinder 6 and a heating part outlet bin 7. One end of the heating part cylinder 6 is provided with a heating part inlet bin 2 for feeding, and the other end of the heating part cylinder 6 is provided with a heating part outlet bin 7 for discharging tail gas. A heating part support device 4 is provided in the middle of the heating part cylinder 6. The heating part cylinder 6 and the heating part support device 4 are rotatably connected. A heating part transmission device 10 is also provided on the heating part cylinder 6. The heating part cylinder 6 and the heating part transmission device 10 are rotatably connected. The heating part transmission device 10 includes a driving motor and a driving gear. A driven gear is provided on the outer wall of the heating part cylinder 6. The driving gear and the driven gear are meshed.

[0037] The driving motor can drive the driving gear to rotate, so that the driving gear drives the driven gear and the heating part cylinder 6 to rotate, so as to achieve uniform mixing of the gas and raw materials in the heating part cylinder 6, and also ensure uniform and rapid heating of the gas and raw materials, and at the same time drive the raw materials in the heating part cylinder 6 to move toward the heating part outlet bin 7, so as to achieve the burning of the raw materials. The burned raw materials are discharged into the exhaust gas treatment device 23 through the smoke exhaust pipe, and the exhaust gas treatment device 23 performs combustion treatment on the exhaust gas to remove harmful gases and asphalt in the exhaust gas, and then the exhaust gas enters the dust removal device 24, and the dust removal device 24 recovers the dust, and then the exhaust gas is discharged through the dust removal device 24;

[0038] A heating part airtight device 3 is provided at the contact position between the heating part inlet bin 2 and the heating part cylinder 6. The setting of the heating part airtight device 3 ensures the airtightness of the heating part cylinder 6 and avoids the leakage of tail gas.

[0039] The heating part inlet bin 2 is also connected to an atmosphere injecting device 12, which can inject one or more gases into the heating part cylinder 6 respectively, and can also inject a variety of mixed gases, with a wider range of selectivity, meeting the production of products with different requirements;

[0040] The contact position between the heating part outlet bin 7 and the heating part cylinder 6 is also provided with a heating part airtight device 3;

[0041] A heating part stop wheel device 9 for limiting the position of the heating part cylinder 6 is provided below the heating part support device 4. The heating part outlet bin 7 is respectively connected with a tar discharge device 8 for discharging tar, a bulk material recovery device 13 for recovering bulk materials and a cooling device 17. The bulk material recovery device 13 is connected with the heating part inlet bin 2 through a recovery pipeline. A bulk material rejection device 11 for rejecting bulk materials is also provided between the heating part outlet bin 7 and the bulk material recovery device 13. The bulk material rejection device 11 is respectively connected with the heating part outlet bin 7 and the bulk material recovery device 13. The setting of the bulk material recovery device 13 avoids waste of resources. The setting of the tar discharge device 8 can effectively avoid waste of tar.

[0042] The cooling device 17 comprises a cooling part inlet bin 14, a cooling part cylinder 18 and a cooling part outlet bin 19. The cooling part inlet bin 14 is installed at one end of the cooling part cylinder 18, and the cooling part outlet bin 19 is installed at the other end of the cooling part cylinder 18. The cooling part airtight device 15 is installed at the contact position between the cooling part cylinder 18 and the cooling part inlet bin 14 and the cooling part outlet bin 19.

[0043] The cooling part cylinder 18 is also rotatably connected to a cooling part support device 16 for supporting the cooling part cylinder 18, and a cooling part stopper wheel device 20 for limiting the cooling part cylinder 18 is provided below the cooling part support device 16. The cooling part cylinder 18 is also connected to a cooling part transmission device 21 for driving the cooling part cylinder 18, and the structure of the cooling part transmission device 21 is the same as that of the heating part transmission device 10;

[0044] The cooling portion outlet bin 19 is connected to a product collecting device 22 for collecting products.

[0045] In summary, the working principle of the present invention is: the driving motor can drive the driving gear to rotate, so that the driving gear drives the driven gear and the heating part cylinder 6 to rotate, so as to achieve uniform mixing of the gas and the raw material in the heating part cylinder 6, and also ensure uniform and rapid heating of the gas and the raw material, and at the same time drive the raw material in the heating part cylinder 6 to move toward the heating part outlet bin 7, so as to achieve the burning of the raw material, and the exhaust gas after burning is discharged into the exhaust gas treatment device 23 through the smoke exhaust pipe, and the exhaust gas treatment device 23 performs combustion treatment on the exhaust gas to remove harmful gases and asphalt in the exhaust gas, and then the exhaust gas enters the dust removal device 24, and the dust removal device 24 recovers the dust, and then the exhaust gas is discharged through the dust removal device 24;

[0046] The high-temperature material enters the cooling section cylinder 18, and then the cooling section transmission device 21 drives the cooling section cylinder 18 to rotate, so that the high-temperature material in the cooling section cylinder 18 is gradually cooled, and the cooled material is collected by the product collection device 22;

[0047] The present invention can meet the more diversified production needs of customers by providing a heating unit 5 and a cooling device 17, and at the same time process the tail gas, making the gas emission more environmentally friendly and reducing the pollution of the tail gas to the environment.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tail gas treatment device for an airtight continuous rotary kiln, comprising a heating portion (5) for heating and mixing materials, the heating portion (5) being further connected to a tail gas treatment assembly, the tail gas treatment assembly comprising a tail gas treatment device (23) for treating tail gas, a dust removal device (24) for treating dust in the tail gas, and a dust collection device (25) for collecting dust, an air pump for extracting tail gas being installed in the tail gas treatment device (23), an exhaust end of the tail gas treatment device (23) being connected to the dust removal device (24), and the dust removal device (24) being further connected to the dust collection device (25) via a guide pipe.

2. The tail gas treatment device of the externally heated airtight continuous rotary kiln according to claim 1, characterized in that: The heating section (5) comprises a heating section inlet bin (2), a heating section cylinder (6) and a heating section outlet bin (7); one end of the heating section cylinder (6) is provided with a heating section inlet bin (2) for feeding, and the other end of the heating section cylinder (6) is provided with a heating section outlet bin (7) for discharging tail gas; a heating section support device (4) is provided in the middle of the heating section cylinder (6); the heating section cylinder (6) and the heating section support device (4) are rotatably connected; a heating section transmission device (10) is also provided on the heating section cylinder (6); the heating section cylinder (6) and the heating section transmission device (10) are rotatably connected.

3. The tail gas treatment device of the externally heated airtight continuous rotary kiln according to claim 3, characterized in that: The heating part transmission device (10) comprises a driving motor and a driving gear, and the outer wall of the heating part cylinder (6) is provided with a driven gear, and the driving gear and the driven gear are meshed.

4. The tail gas treatment device of the externally heated airtight continuous rotary kiln according to claim 3, characterized in that: A heating section airtight device (3) is provided at the contact position between the heating section inlet bin (2) and the heating section cylinder (6), and a heating section airtight device (3) is also provided at the contact position between the heating section outlet bin (7) and the heating section cylinder (6).

5. The tail gas treatment device of the externally heated airtight continuous rotary kiln according to claim 2, characterized in that: The heating section inlet bin (2) is also connected to an atmosphere injection device (12).

6. The tail gas treatment device of the externally heated airtight continuous rotary kiln according to claim 3, characterized in that: A heating part stop wheel device (9) for limiting the position of the heating part cylinder (6) is provided below the heating part support device (4); the heating part outlet bin (7) is respectively connected to a tar discharge device (8) for discharging tar, a bulk material recovery device (13) for recovering bulk materials, and a cooling device (17); the bulk material recovery device (13) is connected to the heating part inlet bin (2) via a recovery pipe; a bulk material rejection device (11) for rejecting bulk materials is also provided between the heating part outlet bin (7) and the bulk material recovery device (13); the bulk material rejection device (11) is respectively connected to the heating part outlet bin (7) and the bulk material recovery device (13).

7. The tail gas treatment device of the externally heated airtight continuous rotary kiln according to claim 1, characterized in that: It also includes a feeding device (1) for supplying materials and a cooling device (17) for cooling materials. The feeding device (1) and the heating part (5) are connected via a flow guide pipe, and the heating part (5) and the cooling device (17) are also connected via a flow guide pipe.

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