Energy-saving rotary kiln

Abstract

The energy-saving rotary kiln comprises a kiln head sealer, a base and a kiln tail sealer, a feeding port is formed in the top of the kiln head sealer, a heating sleeve is fixedly installed on the portion, around the feeding port, of the outer side wall face of the kiln head sealer, a barrel is connected between a discharging port and the feeding port, and the heating sleeve is fixedly installed on the outer side wall face of the kiln head sealer. A driven gear is fixedly mounted at the position, where the driving gear is located, of the outer side wall face of the barrel, a flue gas opening is formed in the top end of the discharging opening, a check valve is fixedly mounted on the flue gas opening, a tail gas burner is connected to the tail end of the flue gas opening, and a gas feeding pipe is connected between the tail gas burner and the heating sleeve; according to the device, tail gas is fully purified through the tail gas burner, then the tail gas is conveyed into the heating sleeve through a pipeline, materials at the feeding port are preheated, waste heat contained in the tail gas is utilized, and the generated tail gas is purified and then discharged, so that energy can be saved, and environmental pollution can be reduced.

Description

Technical Field

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

[0002] Rotary kiln generally refers to rotary bed kiln, which refers to rotating calcining kiln (commonly known as rotary kiln). It looks similar to a rotary bed and belongs to the category of building materials equipment. Rotary kilns can be divided into cement kilns, metallurgical chemical kilns and lime kilns according to the materials they process. Cement kilns are mainly used to calcine cement clinker, which can be divided into two categories: dry process cement kilns and wet process cement kilns. Metallurgical chemical kilns are mainly used in the metallurgical industry for magnetizing roasting of lean iron ore in steel mills; oxidative roasting of chromium and nickel iron ore; roasting of high-alumina vanadium ore in refractory plants and roasting of clinker and aluminum hydroxide in aluminum plants; and roasting of chromium ore sand and chromium ore powder in chemical plants. Lime kilns (i.e. active lime kilns) are used to roast active lime and light-burned dolomite for use in steel mills and ferroalloy plants.

[0003] At present, the exhaust gas generated by rotary kilns is mostly discharged into the atmosphere. However, since the exhaust gas in the rotary kiln still contains waste heat, discharging it into the atmosphere will cause environmental pollution problems and waste of energy, increase production costs, and is not conducive to the sustainable development of the environment. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides an energy-saving rotary kiln, which solves the technical problems raised in the above-mentioned background technology.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: an energy-saving rotary kiln, including a kiln head sealer, a base and a kiln tail sealer, the top of the kiln head sealer is provided with a feed port, a heating sleeve is fixedly installed on the outer wall surface of the kiln head sealer around the feed port, one side of the heating sleeve is connected to a discharge port, a plurality of supporting wheel groups are fixedly installed on the top wall surface of the base, a driving device is fixedly installed on the top wall surface of the base, a driving end of the driving device is connected to a driving gear, a discharge port is provided in the kiln tail sealer, and the discharge port A conveyor belt is provided at the bottom, a burner is fixedly installed on the outer wall of the kiln tail sealer, a cylinder is connected between the discharge port and the feed port, a roller is installed on the outer wall of the cylinder at the corresponding position of the support wheel group, a driven gear is fixedly installed on the outer wall of the cylinder at the driving gear, a combustion pipe is connected to the burner into the cylinder, a flue gas outlet is provided at the top of the discharge port, a check valve is fixedly installed on the flue gas outlet, a tail gas burner is connected to the end of the flue gas outlet, and an air supply pipe is connected between the tail gas burner and the heating sleeve.

[0006] Preferably, the tail gas burner is equipped with a built-in filter.

[0007] Preferably, a pressure relief valve is fixedly installed on the air supply pipe.

[0008] Preferably, the driven gear and the driving gear are meshed with each other.

[0009] Preferably, both ends of the cylinder are sealed and installed on the kiln head sealer and the kiln tail sealer respectively.

[0010] Preferably, refractory bricks or castables are built inside the cylinder.

[0011] Preferably, the rolling ring is in contact with the supporting wheel assembly.

[0012] Beneficial Effects

[0013] The utility model provides an energy-saving rotary kiln, which has the following beneficial effects: when the device is in use, the tail gas is fully purified by the tail gas burner, and the purified tail gas is then passed through the heating sleeve around the feed port of the pipeline conveyor belt to preheat the material at the feed port, the residual heat contained in the tail gas is utilized, and the generated tail gas is purified before being discharged, which can save energy and reduce environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model is a schematic diagram of the structure of an energy-saving rotary kiln.

[0015] In the figure: 1. kiln head sealer; 2. feed port; 3. cylinder; 4. roller; 5. support wheel assembly; 6. base; 7. drive device; 8. drive gear; 9. driven gear; 10. heating sleeve; 11. discharge port; 12. air supply pipe; 13. tail gas burner; 14. flue gas outlet; 15. check valve; 16. burner; 17. combustion pipe; 18. conveyor belt; 19. feed port; 20. kiln tail sealer. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the implementation regulations described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1The utility model provides a technical solution for an energy-saving rotary kiln: an energy-saving rotary kiln, comprising a kiln head sealer 1, a base 6 and a kiln tail sealer 20, a feed port 2 is provided at the top of the kiln head sealer 1, a heating sleeve 10 is fixedly installed on the outer wall of the kiln head sealer 1 around the feed port 2, a discharge port 11 is connected to one side of the heating sleeve 10, a plurality of supporting wheel groups 5 are fixedly installed on the top wall of the base 6, a driving device 7 is fixedly installed on the top wall of the base 6, a driving end of the driving device 7 is connected to a driving gear 8, a feed port 19 is provided in the kiln tail sealer 20, and a bottom of the feed port 19 is provided There is a conveyor belt 18, a burner 16 is fixedly installed on the outer wall of the kiln tail sealer 20, a cylinder 3 is connected between the discharge port 19 and the feed port 2, a roller 4 is installed on the outer wall of the cylinder 3 at the corresponding position of the support wheel group 5, a driven gear 9 is fixedly installed on the outer wall of the cylinder 3 at the driving gear 8, the burner 16 is connected to the cylinder 3 with a combustion tube 17, a flue gas outlet 14 is provided at the top of the discharge port 19, a check valve 15 is fixedly installed on the flue gas outlet 14, a tail gas burner 13 is connected to the end of the flue gas outlet 14, and an air supply pipe 12 is connected between the tail gas burner 13 and the heating sleeve 10.

[0018] Furthermore, the tail gas burner 13 is equipped with a filter.

[0019] Furthermore, a pressure relief valve is fixedly installed on the air supply pipe 12 .

[0020] Furthermore, the driven gear 9 and the driving gear 8 are meshed with each other.

[0021] Furthermore, two ends of the cylinder 3 are sealed and installed on the kiln head sealer 1 and the kiln tail sealer 20 respectively.

[0022] Furthermore, refractory bricks or castables are laid inside the cylinder 3 .

[0023] Furthermore, the rolling ring 4 is in contact with the supporting wheel assembly 5 .

[0024] Embodiment: When the device is in use, the material is fed through the feed port 2 , and the material enters the cylinder 3 from the feed port 2 for calcination, and then is discharged from the end discharge port 19 , and the material is transferred through the conveyor belt 18 .

[0025] A plurality of supporting wheel groups 5 support the cylinder body 3 through the roller ring 4. The driving device 7 drives the driving gear 8 to rotate. The driving gear 8 meshes with the driven gear 9 to drive the cylinder body 3 to rotate.

[0026] The exhaust gas generated by the combustion and the residual incompletely burned exhaust gas are discharged from the end of the cylinder 3 and rise, rise to the flue gas outlet 14, pass through the check valve 15 and enter the exhaust gas burner 13 for full combustion, so that the exhaust gas is purified into a gas suitable for discharge.

[0027] The purified gas after combustion passes through the built-in filter of the tail gas burner 13 and then enters the heating jacket 10 through the air supply pipe 12. The temperature of the gas is also transmitted to the heating jacket 10 to preliminarily heat the material in the feed port 2, thereby utilizing the waste heat and saving the resources required for heating the material.

[0028] The gas passes through the heating jacket 10 and is finally discharged from the discharge port 11. A pressure relief valve is installed on the air supply pipe 12 to prevent excessive pressure.

[0029] It should be noted that, in this document, relational terms such as first and second, etc. are merely used to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. An energy-saving rotary kiln, comprising a kiln head sealer (1), a base (6) and a kiln tail sealer (20), characterized in that: A feed port (2) is provided at the top of the kiln head sealer (1), a heating sleeve (10) is fixedly mounted on the outer wall surface of the kiln head sealer (1) around the feed port (2), and a discharge port (11) is connected to one side of the heating sleeve (10), a plurality of support wheel groups (5) are fixedly mounted on the top wall surface of the base (6), a driving device (7) is fixedly mounted on the top wall surface of the base (6), and a driving end of the driving device (7) is connected to a driving gear (8), a feed port (19) is provided in the kiln tail sealer (20), a conveyor belt (18) is provided at the bottom of the feed port (19), and a burner (16) is fixedly mounted on the outer wall surface of the kiln tail sealer (20) A cylinder (3) is connected between the feed port (19) and the feed port (2); a roller (4) is installed on the outer wall of the cylinder (3) at a corresponding position of the support wheel group (5); a driven gear (9) is fixedly installed on the outer wall of the cylinder (3) at the driving gear (8); the burner (16) is connected to a combustion tube (17) in the cylinder (3); a flue gas outlet (14) is provided at the top end of the feed port (19); a check valve (15) is fixedly installed on the flue gas outlet (14); an exhaust gas burner (13) is connected to the end of the flue gas outlet (14); and an air supply pipe (12) is connected between the exhaust gas burner (13) and the heating sleeve (10).

2. An energy-saving rotary kiln according to claim 1, characterized in that: The tail gas burner (13) is equipped with a filter.

3. The energy-saving rotary kiln according to claim 1, characterized in that: A pressure relief valve is fixedly mounted on the air supply pipe (12).

4. The energy-saving rotary kiln according to claim 1, characterized in that: The driven gear (9) and the driving gear (8) are meshed with each other.

5. The energy-saving rotary kiln according to claim 1, characterized in that: The two ends of the cylinder (3) are respectively sealed and installed on the kiln head sealer (1) and the kiln tail sealer (20).

6. The energy-saving rotary kiln according to claim 1, characterized in that: The cylinder (3) is built with refractory bricks or castables.

7. The energy-saving rotary kiln according to claim 1, characterized in that: The rolling ring (4) is in contact with the supporting wheel assembly (5).

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