Lime kiln

Abstract

The utility model discloses a lime kiln which comprises a lime kiln body, a feeding hopper is arranged at the top of the lime kiln body, a cooling chamber is arranged at the bottom of the lime kiln body, a preheating zone and a calcining zone are arranged in the lime kiln body from top to bottom, and further, an upper suction beam and a plurality of heat conduction beams are arranged in the preheating zone. The upper suction beam is connected with a heat exchanger through a first pipeline, an air outlet pipe opening of the heat exchanger is connected with a bag-type dust collector, an upper combustion beam and a lower combustion beam are arranged in the calcining zone and connected with a plurality of heat conduction beams through second pipelines, and the other end of the upper combustion beam and the other end of the lower combustion beam are connected with an air blower through a third pipeline. A supporting plate is arranged on one side of the lime kiln body, a combustor is arranged on the supporting plate, a fire outlet of the combustor is communicated with the calcining zone, and a ventilation opening is formed in the top of the cooling chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of calcination, in particular to a lime kiln. Background Art

[0002] In the lime production process, limestone needs to be placed in a lime kiln for calcination. Lime kilns are widely used in the field of steel smelting production technology. Existing lime kilns are usually divided into a preheating zone, a calcining zone and a cooling zone. How to improve the heat utilization efficiency is crucial for lime kilns. The utility model with publication number CN 209081746U records a lime kiln air intake system, including a lime kiln, an air intake device and a heat exchanger. The lime kiln includes a kiln body, a lower air intake beam, a combustion beam and a kiln body exhaust gas discharge port. However, the heat utilization in the lime kiln is uneven, which is manifested in poor uniformity of heat transfer during its preheating process, and poor fluidity of the cooling medium in the heat exchanger, resulting in uneven heat exchange. For this reason, the utility model provides a lime kiln to overcome this technical problem. Utility Model Content

[0003] The purpose of the utility model is to provide a lime kiln to overcome the problems described in the background technology.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A lime kiln comprises a lime kiln body, a feed hopper is arranged on the top of the lime kiln body, a cooling chamber is arranged at the bottom of the lime kiln body, a preheating zone and a calcining zone are arranged from top to bottom in the lime kiln body, further, an upper suction beam and a plurality of heat-conducting beams are arranged in the preheating zone, the upper suction beam is connected to a heat exchanger through a first pipeline, the air outlet of the heat exchanger is connected to a bag dust collector, an upper combustion beam and a lower combustion beam are arranged in the calcining zone, the upper combustion beam and the lower combustion beam are connected to a plurality of heat-conducting beams through a second pipeline, and the other ends of the upper combustion beam and the lower combustion beam are connected to a blower through a third pipeline, a support plate is arranged on one side of the lime kiln body, a burner is arranged on the support plate, a fire outlet of the burner is connected to the calcining zone, a vent is arranged on the top of the cooling chamber, a fan is arranged on the top of the vent and the vent is located below the support plate, and a discharge port is arranged on one side of the cooling chamber;

[0006] A cooling water circulation pipe is connected to one side of the heat exchanger. A water pump is arranged on the cooling water circulation pipe, and two ends of the cooling water circulation pipe are respectively connected to the upper and lower parts of the heat exchanger.

[0007] Furthermore, it also includes a bucket elevator, which is located on one side of the lime kiln body and the top of the bucket elevator is connected to the feed hopper.

[0008] Furthermore, a discharge hole is provided at the top of the cooling chamber, the discharge hole is communicated with the lime kiln body and guide bars are provided on both sides of the discharge hole, a bottom gate plate is slidably provided in the guide bar, and a hydraulic cylinder is also provided at the top of the cooling chamber, and the hydraulic cylinder push-out end is connected to the bottom gate plate.

[0009] Furthermore, a plurality of semicircular bottoms are arranged at the bottom of the cooling chamber, a screw feeder is rotatably arranged in the semicircular bottom, and one end of the screw feeder extends into the discharge port.

[0010] Furthermore, an upper partition and a lower partition are provided in the heat exchanger, a cooling cavity is formed between the upper partition and the lower partition, and a plurality of heat exchange air pipes are connected between the upper partition and the lower partition, and both ends of the cooling water circulation pipe are connected to the cooling cavity.

[0011] Furthermore, an air outlet pipe and an air inlet pipe are respectively arranged on the upper and lower sides of the heat exchanger side wall, a water inlet pipe is arranged on the upper partition plate, and a drain pipe is arranged on the lower partition plate, and both the water inlet pipe and the drain pipe pass through the side wall of the heat exchanger.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model connects the upper and lower combustion beams in the calcining zone with a plurality of heat-conducting beams through a second pipeline. The heat-conducting beams are arranged in the preheating zone, so that the heat generated on the combustion beams is respectively transferred to the heat-conducting beams, thereby increasing the uniformity of heat transfer. A cooling water circulation pipe and a water pump are arranged on one side of the heat exchanger, so that the cooling water is circulated and extracted, and the fluidity of the cooling water in the heat exchanger is increased, so that the heat exchange between the cooling water and the flue gas is more uniform, thereby increasing the uniformity of heat utilization. A fan is arranged on the ventilating port on the top of the cooling chamber to facilitate the cooling of the material, and a spiral feeder is arranged at the bottom of the cooling chamber to facilitate the discharge of the cooled material. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model.

[0015] Figure 2 Schematic diagram of the internal structure of the heat exchanger.

[0016] Figure 3 Schematic diagram of the internal structure of the cooling chamber.

[0017] In the figure, 1-lime kiln body, 1a-preheating zone, 1b-calcining zone, 2-feeding hopper, 3-bucket elevator, 4-cooling chamber, 41-hydraulic cylinder, 42-bottom gate, 43-discharge hole, 44-guide rail, 45-semicircular bottom, 46-screw feeder, 5-support plate, 6-fan, 7-ventilation port, 8-burner, 9-lower combustion beam, 10-upper combustion beam, 11-second pipeline, 12-heat conduction beam, 13-upper suction beam, 14-first pipeline, 15-heat exchanger, 151-upper partition, 152-heat exchange air pipe, 153-lower partition, 154-air outlet pipe, 155-cooling water circulation pipe, 156-water pump, 157-drain pipe, 158-water inlet pipe, 159-air inlet pipe, 16-bag dust collector, 17-discharge port, 18-third pipeline, 19-blower. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] Embodiment 1:

[0020] refer to Figure 1 As shown, the utility model provides a lime kiln, including a lime kiln body 1, a feed hopper 2 is arranged on the top of the lime kiln body 1, a cooling chamber 4 is arranged at the bottom of the lime kiln body 1, the size of the cooling chamber 4 needs to be larger than the size of the lime kiln body 1, a preheating zone 1a and a calcining zone 1b are arranged from top to bottom in the lime kiln body 1, an upper suction beam 13 and a plurality of heat-conducting beams 12 are arranged in the preheating zone 1a, the upper suction beam 13 and the heat-conducting beam 12 are both tubular structures and holes are arranged thereon at intervals, the upper suction beam 13 is connected to the heat exchanger 15 through the first pipeline 14, so as to exchange the waste heat in the preheating zone 1a, the air outlet of the heat exchanger 15 is connected to the bag dust collector 16 to remove dust from the flue gas, and the upper combustion beam 10 is arranged in the calcining zone 1b. and lower combustion beam 9, the upper combustion beam 10 and the lower combustion beam 9 are both tubular structures, the upper combustion beam 10 and the lower combustion beam 9 are connected to a plurality of heat-conducting beams 12 through a second pipeline 11, and the other ends of the upper combustion beam 10 and the lower combustion beam 9 are connected to a blower 19 through a third pipeline 18, so as to transport the heat in the calcining zone 1b to the plurality of heat-conducting beams 12, a support plate 5 is arranged on one side of the lime kiln body 1, a burner 8 is arranged on the support plate 5, the burner 8 is arranged around the lime kiln body 1, and the fire outlet of the burner 8 is connected to the calcining zone 1b, a vent 7 is arranged on the top of the cooling chamber 4, a fan 6 is arranged on the top of the vent 7 and the vent 7 is located below the support plate 5, a discharge port 17 is arranged on one side of the cooling chamber 4, and a plurality of discharge ports 17 may be arranged;

[0021] refer to Figure 2 As shown, a cooling water circulation pipe 155 is connected to one side of the heat exchanger 15, a water pump 156 is provided on the cooling water circulation pipe 155, and the two ends of the cooling water circulation pipe 155 are respectively connected to the upper and lower parts of the heat exchanger 15, so that the cooling water is circulated and extracted, which improves the fluidity of the cooling water and avoids uneven heat exchange due to poor fluidity.

[0022] Embodiment 2:

[0023] On the basis of the above embodiment, another embodiment of the utility model is to further include a bucket elevator 3, which is located at one side of the lime kiln body 1 and the top of the bucket elevator 3 is connected to the feed hopper 2, so as to facilitate feeding into the lime kiln.

[0024] Embodiment 3:

[0025] Based on the above embodiments, Figure 3 As shown, in order to facilitate the discharge of the material in the lime kiln body 1 into the cooling chamber 4, a discharge hole 43 is provided at the top of the cooling chamber 4, the discharge hole 43 is communicated with the lime kiln body 1 and guide rails 44 are provided on both sides of the discharge hole 43, a bottom gate plate 42 is slidably provided in the guide rail 44, and the number of the bottom gate plates 42 is 2. A hydraulic cylinder 41 is also provided at the top of the cooling chamber 4, and the push-out end of the hydraulic cylinder 41 is connected to the bottom gate plate 42. When the hydraulic cylinder 41 is in the initial state, the discharge hole 43 is opened, and the two bottom gate plates 42 block the discharge hole 43 when the hydraulic cylinder 41 is pushed out. In order to facilitate the discharge of the material in the cooling chamber 4, a plurality of semicircular bottoms 45 are provided at the bottom of the cooling chamber 4, and a screw feeder 46 is rotatably provided in the semicircular bottom 45, and one end of the screw feeder 46 extends into the discharge port 17.

[0026] Embodiment 4:

[0027] On the basis of the above embodiment, another embodiment of the utility model is that the heat exchanger 15 is provided with an upper partition 151 and a lower partition 153, a cooling cavity is formed between the upper partition 151 and the lower partition 153, cooling water is injected into the cooling cavity, a plurality of heat exchange air pipes 152 are connected between the upper partition 151 and the lower partition 153, smoke passes through the heat exchange air pipes 152, and both ends of the cooling water circulation pipe 155 are connected to the cooling cavity. The upper and lower sides of the side wall of the heat exchanger 15 are respectively provided with an outlet pipe 154 and an inlet pipe 159, and an inlet pipe 158 is provided on the upper partition 151, so as to facilitate the addition of cooling water to the cooling cavity. In order to facilitate the use of the water after heat exchange, a drain pipe 157 is provided on the lower partition 153, and both the inlet pipe 158 and the drain pipe 157 penetrate the side wall of the heat exchanger 15, and valves are provided on the inlet pipe 158 and the drain pipe 157.

[0028] Although the utility model is described herein with reference to a plurality of illustrative embodiments of the utility model, it should be understood that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the disclosure, drawings, and claims of the present application, various modifications and improvements may be made to the components or layout of the subject combination layout. In addition to the modifications and improvements made to the components or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A lime kiln, comprising a lime kiln body (1), a feed hopper (2) being arranged at the top of the lime kiln body (1), a cooling chamber (4) being arranged at the bottom of the lime kiln body (1), a preheating zone (1a) and a calcining zone (1b) being arranged from top to bottom in the lime kiln body (1), characterized in that: The preheating zone (1a) is provided with an upper suction beam (13) and a plurality of heat-conducting beams (12); the upper suction beam (13) is connected to a heat exchanger (15) via a first pipeline (14); the air outlet of the heat exchanger (15) is connected to a bag filter (16); the calcining zone (1b) is provided with an upper combustion beam (10) and a lower combustion beam (9); the upper combustion beam (10) and the lower combustion beam (9) are connected to a plurality of heat-conducting beams (12) via a second pipeline (11); and the upper combustion beam (10) The other end of the lower combustion beam (9) is connected to a blower (19) through a third pipeline (18); a support plate (5) is provided on one side of the lime kiln body (1); a burner (8) is provided on the support plate (5); a fire outlet of the burner (8) is connected to the calcining zone (1b); a vent (7) is provided on the top of the cooling chamber (4); a fan (6) is provided on the top of the vent (7) and the vent (7) is located below the support plate (5); and a discharge port (17) is provided on one side of the cooling chamber (4); A cooling water circulation pipe (155) is connected to one side of the heat exchanger (15), a water pump (156) is provided on the cooling water circulation pipe (155), and two ends of the cooling water circulation pipe (155) are respectively connected to the upper and lower parts of the heat exchanger (15).

2. A lime kiln according to claim 1, characterized in that: It also comprises a bucket elevator (3), which is located on one side of the lime kiln body (1) and the top of the bucket elevator (3) is connected to the feed hopper (2).

3. A lime kiln according to claim 1, characterized in that: A discharge hole (43) is arranged at the top of the cooling chamber (4), the discharge hole (43) is communicated with the lime kiln body (1), and guide rails (44) are arranged on both sides of the discharge hole (43), a bottom gate plate (42) is slidably arranged in the guide rails (44), and a hydraulic cylinder (41) is also arranged at the top of the cooling chamber (4), and the push-out end of the hydraulic cylinder (41) is connected to the bottom gate plate (42).

4. A lime kiln according to claim 1, characterized in that: The bottom of the cooling chamber (4) is provided with a plurality of semicircular bottoms (45), a screw feeder (46) is rotatably arranged in the semicircular bottom (45), and one end of the screw feeder (46) extends into the discharge port (17).

5. A lime kiln according to claim 1, characterized in that: An upper partition (151) and a lower partition (153) are provided in the heat exchanger (15), a cooling chamber is formed between the upper partition (151) and the lower partition (153), and a plurality of heat exchange air pipes (152) are connected between the upper partition (151) and the lower partition (153), and both ends of the cooling water circulation pipe (155) are connected to the cooling chamber.

6. A lime kiln according to claim 5, characterized in that: An air outlet pipe (154) and an air inlet pipe (159) are respectively arranged at the upper and lower sides of the side wall of the heat exchanger (15), a water inlet pipe (158) is arranged on the upper partition plate (151), and a drainage pipe (157) is arranged on the lower partition plate (153); the water inlet pipe (158) and the drainage pipe (157) both penetrate the side wall of the heat exchanger (15).

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