Kiln tail device of rotary kiln

Abstract

The utility model belongs to the technical field of rotary kilns, and discloses a rotary kiln tail device which comprises a kiln tail smoke chamber, a rotary cylinder is arranged on one side of the kiln tail smoke chamber and connected with a bearing of the kiln tail smoke chamber, two symmetrically-arranged processing cylinders are arranged in the kiln tail smoke chamber, and the processing cylinders are connected with the rotary cylinder through bearings. The treatment barrel is connected with the rotary barrel body through a smoke inlet pipe group, a spraying pipe group is arranged in the treatment barrel, a plurality of baffles which are correspondingly arranged are mounted above the spraying pipe group, a filtering assembly is arranged above the baffles, a flow collecting cover is fixedly connected to the top of the treatment barrel, the flow collecting cover is connected with an exhaust pipe group, and the exhaust pipe group is connected with the smoke inlet pipe group. Spraying water can be accumulated at the bottom of the inner cavity of the processing barrel, so that the one-way smoke outlet is submerged, smoke is discharged downwards into the water, the flowing speed of the smoke is relieved through the water, soot in the smoke is absorbed, then the spraying pipe set sprays downwards, water vapor carried by the smoke is reduced, and the situation that a large amount of soot is pasted on a filter screen and blocks the filter screen is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary kilns, in particular to a rotary kiln tail device. Background Art

[0002] The rotary kiln is a large-scale thermal equipment widely used in the metallurgical, chemical, building materials and other industries. The cylinder of the rotary kiln is a cylindrical structure made of rolled steel plates with a large diameter and length. The cylinder is supported by multiple rollers and rotated by a transmission device. Sealing devices are usually installed at both ends of the rotary kiln to prevent outside air from entering the kiln and gas from leaking out of the kiln. The performance of the sealing device directly affects the thermal efficiency and environmental protection effect of the rotary kiln. A kiln tail smoke chamber is set at the tail of the rotary kiln.

[0003] The Chinese patent application number 202222476773.X discloses a multi-purification lime rotary kiln tail flue gas purification device. In order to solve the problem of the existing lime rotary kiln tail flue gas purification device, the flue gas is high in temperature and mixed with a large amount of smoke dust, which causes the filter structure to be easily blocked over time and affects the filtration efficiency. The device includes a kiln tail smoke chamber, one side of the kiln tail smoke chamber is provided with a rotating cylinder, one end of the rotating cylinder is provided with a kiln head cover, a meandering pipe is provided inside the kiln tail smoke chamber, the upper end of the kiln tail smoke chamber is provided with a filter pipe, the lower end of the meandering pipe is provided with an ash collection bin, the inside of the ash collection bin is provided with an electromagnetic valve, and the lower end of the ash collection bin is provided with a waste discharge pipe. The meandering pipe is used to separate the flue gas and the dust, and the cooling spray pipe is used to cool the flue gas, which greatly improves the flue gas filtration efficiency of the kiln tail smoke chamber.

[0004] However, the above-mentioned multiple purification lime rotary kiln tail gas purification device has the following problems during actual use: a large amount of water vapor is carried by the flue gas during its flow, causing some soot mixed with water vapor to stick to the filter, resulting in filter blockage.

[0005] Therefore, a rotary kiln tail device is proposed to solve the above problems. Utility Model Content

[0006] In order to solve the problems raised in the above background technology, the utility model provides a rotary kiln tail device, which has the advantages of relieving the flue gas flow pressure and avoiding carrying a large amount of water vapor to cause the ash to stick to the filter.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotary kiln tail device, comprising a kiln tail smoke chamber, a rotating cylinder is provided on one side of the kiln tail smoke chamber, and the rotating cylinder is connected to the kiln tail smoke chamber bearing, two symmetrically arranged treatment cylinders are provided in the kiln tail smoke chamber, the treatment cylinders are connected to the rotating cylinders through a smoke inlet pipe group, a spray pipe group is provided in the treatment cylinder, a plurality of corresponding baffles are installed above the spray pipe group, a filter assembly is provided above the baffle, a collecting cover is fixedly connected to the top of the treatment cylinder, and the collecting cover is connected to the exhaust pipe group.

[0008] Preferably, the smoke inlet pipe group includes a smoke guide transverse pipe, the smoke guide transverse pipe is connected to a smoke guide longitudinal pipe, both ends of the smoke guide longitudinal pipe are connected to smoke inlet elbows, the smoke inlet elbow is connected to an annular smoke pipe through a connecting pipe, and the bottom of the annular smoke pipe is equipped with multiple evenly distributed one-way smoke outlets.

[0009] Preferably, the spray pipe group includes an annular spray pipe arranged in the treatment tube, the bottom of the annular spray pipe is installed with evenly distributed spray heads, and the smoke inlet elbow passes through the inner side of the annular spray pipe.

[0010] Preferably, a U-shaped water pipe is connected between the annular spray pipes, the U-shaped water pipe passes through the treatment cylinder, the U-shaped water pipe is connected to a water supply pipe, and one end of the water supply pipe is connected to a water pipe joint.

[0011] Preferably, the filter assembly consists of a filter screen, a flame-retardant filter cotton layer, a porous filter screen, and an activated carbon filter layer, which are arranged in sequence from bottom to top.

[0012] Preferably, the exhaust pipe group includes a U-shaped air duct, and the U-shaped air duct is connected to the exhaust.

[0013] Preferably, a U-shaped sewage pipe is connected to one side of the treatment cylinder near the bottom, the U-shaped sewage pipe is connected to a sewage pipe, and a sewage outlet is provided at one end of the sewage pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The utility model is provided with a treatment tube and a spray pipe group. The spray water will accumulate at the bottom of the treatment tube cavity, thereby submerging the one-way smoke outlet. The smoke is discharged downward into the water, and the water is used to slow down the flow rate of the smoke and absorb the soot in the smoke. Then the spray pipe group sprays downward, reducing the water vapor carried by the smoke and reducing the situation where a large amount of soot sticks to the filter and blocks the filter.

[0016] 2. The utility model sets up a smoke inlet pipe group, and the smoke introduced into the treatment tube is diverted by the one-way smoke outlet on the annular smoke pipe, so that the smoke forms multiple fine streams, avoiding the accumulation of a large amount of smoke and affecting the adhesion of smoke ash and water, thereby improving the smoke ash cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the treatment cylinder of the present invention;

[0019] Figure 3 This is a structural diagram of the smoke inlet pipe group of the utility model;

[0020] Figure 4 This is a structural diagram of the spray pipe group of the utility model;

[0021] Figure 5 This is a structural diagram of the sewage pipe position of the utility model.

[0022] In the figure: 1. Kiln tail smoke chamber; 2. Rotating cylinder; 3. Processing cylinder;

[0023] 4. Smoke inlet pipe group; 401. Smoke guide horizontal pipe; 402. Smoke guide vertical pipe; 403. Smoke inlet elbow; 404. Connecting pipe; 405. Annular smoke pipe; 406. One-way smoke outlet;

[0024] 5. Sprinkler pipe assembly; 501. Annular sprinkler pipe; 502. Sprinkler head;

[0025] 6. Baffle;

[0026] 7. Filter assembly; 701. Filter screen; 702. Flame-retardant filter cotton layer; 703. Porous filter screen; 704. Activated carbon filter layer;

[0027] 8. Collecting cover;

[0028] 9. Exhaust pipe assembly; 901. U-shaped air guide pipe; 902. Exhaust pipe;

[0029] 10. U-shaped water pipe; 11. Water supply pipe; 12. Water pipe joint; 13. U-shaped sewage pipe; 14. Sewage pipe; 15. Sewage outlet. DETAILED DESCRIPTION

[0030] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0031] like Figures 1 to 5As shown, the utility model provides a rotary kiln tail device, including a kiln tail smoke chamber 1, a rotary cylinder 2 is provided on one side of the kiln tail smoke chamber 1, and the rotary cylinder 2 is connected to the kiln tail smoke chamber 1 with a bearing, two symmetrically arranged processing cylinders 3 are provided in the kiln tail smoke chamber 1, the processing cylinder 3 is connected to the rotary cylinder 2 through a smoke inlet pipe group 4, a spray pipe group 5 is provided in the processing cylinder 3, a plurality of corresponding baffles 6 are installed above the spray pipe group 5, a filter assembly 7 is provided above the baffle 6, a collecting cover 8 is fixedly connected to the top of the processing cylinder 3, the collecting cover 8 is connected to the exhaust pipe group 9, and the spray water It will accumulate at the bottom of the inner cavity of the treatment tube 3, thereby submerging the one-way smoke outlet 406, and the smoke is discharged downward into the water, using water to slow down the flow rate of the smoke and absorb the soot in the smoke, and then the spray pipe group 5 sprays downward to reduce the smoke carrying water vapor and reduce the situation where a large amount of soot sticks to the filter 701 and blocks the filter 701. The smoke introduced into the treatment tube 3 is diverted by the one-way smoke outlet 406 on the annular smoke pipe 405, so that the smoke forms multiple thin streams, avoiding a large amount of smoke accumulating together and affecting the adhesion of soot and water, thereby improving the soot cleaning effect.

[0032] Specifically, the smoke inlet pipe group 4 includes a smoke guide transverse pipe 401, which is connected to a smoke guide longitudinal pipe 402. Both ends of the smoke guide longitudinal pipe 402 are connected to smoke inlet bend pipes 403. The smoke inlet bend pipe 403 is connected to an annular smoke pipe 405 through a connecting pipe 404. The bottom of the annular smoke pipe 405 is equipped with multiple evenly distributed one-way smoke outlets 406.

[0033] Furthermore, the spray pipe group 5 includes an annular spray pipe 501 provided in the treatment tube 3 . Evenly distributed spray heads 502 are installed at the bottom of the annular spray pipe 501 . The smoke inlet elbow 403 passes through the inner side of the annular spray pipe 501 .

[0034] Furthermore, a U-shaped water pipe 10 is connected between the annular spray pipes 501 , the U-shaped water pipe 10 passes through the treatment barrel 3 , the U-shaped water pipe 10 is connected to a water supply pipe 11 , and one end of the water supply pipe 11 is connected to a water pipe connector 12 .

[0035] It is worth noting that the filter assembly 7 is composed of a filter screen 701 , a flame retardant filter cotton layer 702 , a porous filter screen 703 , and an activated carbon filter layer 704 , which are arranged in sequence from bottom to top.

[0036] It is worth noting that the exhaust pipe group 9 includes a U-shaped air guide pipe 901 , and the U-shaped air guide pipe 901 is connected to the exhaust pipe 902 .

[0037] It is worth mentioning that a U-shaped sewage pipe 13 is connected to one side of the treatment cylinder 3 near the bottom, the U-shaped sewage pipe 13 is connected to a sewage pipe 14, and a sewage outlet 15 is provided at one end of the sewage pipe 14.

[0038] Working principle and process: The flue gas in the rotary cylinder 2 passes through the smoke guide horizontal pipe 401, the smoke guide vertical pipe 402, the smoke inlet elbow 403, the connecting pipe 404, and the annular smoke pipe 405 of the smoke inlet pipe group 4 in sequence, and is discharged into the water in the treatment cylinder 3 through the one-way smoke outlet 406. The flue gas can be divided into multiple streams to avoid a large amount of flue gas accumulating together and affecting the contact with water. After being treated and adsorbed by the accumulated water in the treatment cylinder 3, the flue gas flows upward. The water flows through the water pipe joint 12, the water supply pipe 11, and the U-shaped water pipe 10 and is then introduced into the annular spray pipe 501 of the spray pipe group 5. The smoke is then sprayed downwards by the spray head 502 to absorb the soot in the smoke, and the downward spraying can suppress the smoke flow rate to avoid carrying water vapor, and can also make the soot in the smoke fully contact with water. The smoke then passes through the filter mesh 701, the flame retardant filter cotton layer 702, the porous filter mesh 703, and the activated carbon filter layer 704 of the filter assembly 7 in turn, and is discharged through the U-shaped air guide pipe 901 and the exhaust pipe 902 of the exhaust pipe group 9 after filtration. The sewage in the treatment cylinder 3 is discharged regularly, and is discharged from the sewage outlet 15 after passing through the U-shaped sewage guide pipe 13 and the sewage pipe 14 in turn.

[0039] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rotary kiln tail device, comprising a kiln tail smoke chamber (1), characterized in that: A rotary cylinder (2) is provided on one side of the kiln tail smoke chamber (1), and the rotary cylinder (2) is connected to the kiln tail smoke chamber (1) by a bearing. Two symmetrically arranged treatment cylinders (3) are provided in the kiln tail smoke chamber (1), and the treatment cylinders (3) are connected to the rotary cylinder (2) through a smoke inlet pipe group (4). A spray pipe group (5) is provided in the treatment cylinder (3), and a plurality of corresponding baffles (6) are installed above the spray pipe group (5). A filter assembly (7) is provided above the baffle (6). A collecting cover (8) is fixedly connected to the top of the treatment cylinder (3), and the collecting cover (8) is connected to an exhaust pipe group (9).

2. A rotary kiln tail device according to claim 1, characterized in that: The smoke inlet pipe group (4) comprises a smoke guide transverse pipe (401), the smoke guide transverse pipe (401) is connected to a smoke guide longitudinal pipe (402), both ends of the smoke guide longitudinal pipe (402) are connected to smoke inlet bend pipes (403), the smoke inlet bend pipe (403) is connected to an annular smoke pipe (405) via a connecting pipe (404), and a plurality of evenly distributed one-way smoke outlets (406) are installed at the bottom of the annular smoke pipe (405).

3. A rotary kiln tail device according to claim 2, characterized in that: The spray pipe group (5) comprises an annular spray pipe (501) arranged in the treatment cylinder (3), the bottom of the annular spray pipe (501) is equipped with evenly distributed spray heads (502), and the smoke inlet elbow (403) passes through the inner side of the annular spray pipe (501).

4. A rotary kiln tail device according to claim 3, characterized in that: A U-shaped water pipe (10) is connected between the annular spray pipes (501), the U-shaped water pipe (10) passes through the treatment barrel (3), the U-shaped water pipe (10) is connected to a water supply pipe (11), and one end of the water supply pipe (11) is connected to a water pipe joint (12).

5. The rotary kiln tail device according to claim 1, characterized in that: The filter assembly (7) comprises a filter screen (701), a flame-retardant filter cotton layer (702), a porous filter screen (703), and an activated carbon filter layer (704) which are arranged in sequence from bottom to top.

6. The rotary kiln tail device according to claim 1, characterized in that: The exhaust pipe assembly (9) comprises a U-shaped air guide pipe (901), and the U-shaped air guide pipe (901) is connected to an exhaust pipe (902).

7. The rotary kiln tail device according to claim 1, characterized in that: A U-shaped sewage pipe (13) is connected to one side of the treatment cylinder (3) near the bottom, and the U-shaped sewage pipe (13) is connected to a sewage pipe (14). One end of the sewage pipe (14) is provided with a sewage outlet (15).

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