Efficient heating furnace for limestone calcination

Abstract

The efficient heating furnace comprises a preheating box and a calcining furnace, a screw elevator is fixedly connected between the preheating box and the calcining furnace, a filtering structure is connected between the preheating box and the calcining furnace and located in front of the screw elevator in an embedded mode, and a crushing structure is installed on the front surface of the preheating box in an embedded mode. The crushing structure comprises two groups of crushing rollers, connecting shafts and a servo motor, the connecting shafts are fixedly mounted on the front surfaces and the rear surfaces of the crushing rollers, the preheating box comprises a feeding hopper, a first smoke outlet, a box body, a first fuel inlet, a stirring motor and a spiral stirring paddle, the feeding hopper is mounted on the upper surface of the box body in an embedded manner, and the stirring motor is mounted on the lower surface of the box body. And a stirring motor is embedded in the lower surface of the box body. According to the efficient heating furnace for limestone calcination, the heating efficiency can be effectively improved, heat generated during calcination can be fully utilized, and resources can be saved.

Description

Technical Field

[0001] This utility model relates to the field of limestone calcination technology, and in particular to a high-efficiency heating furnace for limestone calcination. Background Technology

[0002] A limestone calcining furnace is an industrial device used for high-temperature calcination of limestone. Its main purpose is to decompose limestone (whose main component is calcium carbonate) into calcium oxide (quicklime) and carbon dioxide. Limestone calcining furnaces have wide applications in industry, mainly for the production of quicklime, which is then used to manufacture industrial products such as cement and glass. Limestone calcination is a process involving a series of physical and chemical changes. The calcination of limestone is mainly completed in a heating furnace, where the limestone is heated and calcined at high temperatures.

[0003] During preheating, the limestone varies in size, resulting in uneven preheating and reduced subsequent heating effect. This leads to poor calcination efficiency, and the heat generated during calcination is not fully utilized and is directly discharged, causing a waste of resources. To address this, we propose a high-efficiency heating furnace for limestone calcination. Utility Model Content

[0004] The main objective of this invention is to provide a high-efficiency heating furnace for limestone calcination, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A high-efficiency heating furnace for limestone calcination includes a preheating box and a calcination furnace. A screw conveyor is fixedly connected between the preheating box and the calcination furnace. A filter structure is embedded and connected between the preheating box and the calcination furnace in front of the screw conveyor. A crushing structure is embedded and installed on the front surface of the preheating box.

[0007] Preferably, the crushing structure includes crushing rollers, connecting shafts, and servo motors. There are two sets of crushing rollers, and connecting shafts are fixedly installed on the front and rear surfaces of the crushing rollers.

[0008] Preferably, the preheating box includes a feed hopper, a first exhaust port, a box body, a first fuel inlet, a stirring motor, and a spiral stirring paddle. The feed hopper is embedded in the upper surface of the box body, the stirring motor is embedded in the lower surface of the box body, the spiral stirring paddle is embedded in the upper surface of the stirring motor inside the box body, the first exhaust port is embedded in the upper part of one side surface of the box body, and the first fuel inlet is embedded in the lower part of the first exhaust port on the lower side surface of the box body.

[0009] Preferably, the servo motor is embedded in the upper part of the front surface of the housing, and the crushing rollers are all embedded inside the housing.

[0010] Preferably, the filter structure includes a door panel, an adsorption layer, a first conveying pipe, a first filter screen, a second filter screen, a second conveying pipe, a filter box, a chute, and a slider. The front surface of the filter box is hinged with a door panel. A first conveying pipe is embedded in one side surface of the filter box, and a second conveying pipe is embedded in the other side surface of the filter box. The filter box has six sets of chute openings on both the upper and lower surfaces. Slider blocks are fixedly installed on the upper and lower surfaces of the adsorption layer, the first filter screen, and the second filter screen, and the sliders are respectively embedded in the chute.

[0011] Preferably, the calcining furnace includes a second flue gas outlet, a furnace body, a second fuel inlet, and a discharge outlet. The discharge outlet is embedded in the lower side surface of one side surface of the furnace body, the second flue gas outlet is embedded in the upper side surface of the other side surface of the furnace body, and the second fuel inlet is embedded in the lower side surface of one side surface of the furnace body.

[0012] Preferably, the spiral elevator is embedded between the housing and the furnace body, the first conveying pipe is embedded on one side surface of the housing located in front of the spiral elevator, and the adsorption layer is embedded on one side surface of the furnace body located in front of the spiral elevator.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1: The crushing structure can crush the limestone entering the preheating box, which helps to improve the uniformity of limestone preheating.

[0015] 2: The filter structure allows hot air from inside the calcining furnace to be introduced into the preheating box, thereby preheating the limestone inside the preheating box and saving resources.

[0016] 3: The adsorption layer, first filter, and second filter can filter the input gas, which helps to improve the efficiency of limestone preheating. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency heating furnace for limestone calcination according to the present invention.

[0018] Figure 2 This is a detailed drawing of the preheating box of a high-efficiency heating furnace for limestone calcination according to this utility model;

[0019] Figure 3This is a cross-sectional view of the casing of a high-efficiency heating furnace for limestone calcination according to this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the filter box of a high-efficiency heating furnace for limestone calcination according to this utility model.

[0021] Figure 5 This utility model relates to a high-efficiency heating furnace for limestone calcination. Figure 4 A magnified view of the details at point A.

[0022] In the diagram: 1. Crushing structure; 101. Crushing roller; 102. Connecting shaft; 103. Servo motor; 2. Preheating box; 201. Feed hopper; 202. First exhaust port; 203. Box body; 204. First fuel inlet; 205. Stirring motor; 206. Spiral agitator; 3. Filtering structure; 301. Door panel; 302. Adsorption layer; 303. First conveying pipe; 304. First filter screen; 305. Second filter screen; 306. Second conveying pipe; 307. Filter box; 308. Slide chute; 309. Sliding block; 4. Spiral elevator; 5. Calcination furnace; 501. Second exhaust port; 502. Furnace body; 503. Second fuel inlet; 504. Discharge port. Detailed Implementation

[0023] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] like Figure 1-5 As shown, a high-efficiency heating furnace for limestone calcination includes a preheating box 2 and a calcination furnace 5. A screw conveyor 4 is fixedly connected between the preheating box 2 and the calcination furnace 5. The screw conveyor 4 is a commonly used material conveying equipment. Its working principle is to convey materials from the bottom to the top through the screw blades. It has the advantages of large conveying capacity, small footprint, simple structure and convenient maintenance. A filter structure 3 is embedded and connected between the preheating box 2 and the calcination furnace 5 in front of the screw conveyor 4. A crushing structure 1 is embedded and installed on the front surface of the preheating box 2.

[0025] In a preferred embodiment, the crushing structure 1 includes a crushing roller 101, a connecting shaft 102, and a servo motor 103. There are two sets of crushing rollers 101, and the connecting shaft 102 is fixedly installed on both the front and rear surfaces of the crushing rollers 101.

[0026] In a preferred embodiment, the preheating box 2 includes a feed hopper 201, a first exhaust port 202, a box body 203, a first fuel inlet 204, a stirring motor 205, and a spiral stirring paddle 206. The feed hopper 201 is embedded in the upper surface of the box body 203, and the stirring motor 205 is embedded in the lower surface of the box body 203. The servo motor 103 and the stirring motor 205 are both of model JB / T6449. The servo motor 103, the stirring motor 205, the connecting shaft 102, and the spiral stirring paddle 206 are respectively connected by motor shafts. The spiral stirring paddle 206 is embedded in the upper surface of the stirring motor 205 inside the box body 203. The first exhaust port 202 is embedded in the upper surface of one side surface of the box body 203, and the first fuel inlet 204 is embedded in the lower surface of one side surface of the box body 203 below the first exhaust port 202.

[0027] In a preferred embodiment, the servo motor 103 is embedded in the upper position of the front surface of the housing 203, and the crushing rollers 101 are all embedded in the interior of the housing 203.

[0028] Fuel is first introduced into the interior of the housing 203 through the first fuel inlet 204. Limestone enters the interior of the housing 203 through the feed hopper 201. The limestone is crushed by the crushing roller 101 and stirred by the spiral agitator 206 driven by the stirring motor 205, so that the limestone is fully preheated. When the limestone enters the interior of the furnace body 502 for calcination, the first fuel inlet 204 can be closed, and the hot air inside the furnace body 502 can be introduced into the interior of the housing 203 through the filter structure 3, thereby realizing the full utilization of resources.

[0029] In a preferred embodiment, the filter structure 3 includes a door panel 301, an adsorption layer 302, a first conveying pipe 303, a first filter screen 304, a second filter screen 305, a second conveying pipe 306, a filter box 307, a chute 308, and a slider 309. The door panel 301 is hinged to the front surface of the filter box 307. The first conveying pipe 303 is embedded on one side surface of the filter box 307, and the second conveying pipe 306 is embedded on the other side surface of the filter box 307. The filter box 307 has six chute 308s on both the upper and lower surfaces. The upper and lower surfaces of the adsorption layer 302, the first filter screen 304, and the second filter screen 305 are all fixedly mounted with sliders 309. The adsorption layer 302 is an activated carbon layer that can adsorb harmful substances in the gas. The mesh size of the second filter screen 305 is larger than that of the first filter screen 304, which facilitates further filtration of the gas. The sliders 309 are respectively embedded in the chute 308.

[0030] In a preferred embodiment, the calcining furnace 5 includes a second flue gas outlet 501, a furnace body 502, a second fuel inlet 503, and a discharge port 504. The discharge port 504 is embedded in the lower side surface of one side of the furnace body 502. Temperature monitoring devices are provided inside the housing 203 and the furnace body 502 to facilitate reasonable control of the temperature inside the housing 203 and the furnace body 502. The second flue gas outlet 501 is embedded in the upper side surface of the other side of the furnace body 502, and the second fuel inlet 503 is embedded in the lower side surface of one side of the furnace body 502.

[0031] In a preferred embodiment, the screw conveyor 4 is embedded between the housing 203 and the furnace body 502, the first conveying pipe 303 is embedded on one side of the housing 203 located in front of the screw conveyor 4, and the adsorption layer 302 is embedded on one side of the furnace body 502 located in front of the screw conveyor 4.

[0032] The gas inside the furnace body 502 enters the filter box 307 through the second conveying pipe 306, and passes through the second filter screen 305, the first filter screen 304, and the adsorption layer 302 in sequence before entering the box body 203 through the first conveying pipe 303. After calcination, the door panel 301 can be opened, and the slider 309 can be pulled out directly from the inside of the slide groove 308, so that the adsorption layer 302, the first filter screen 304, and the second filter screen 305 can be replaced.

[0033] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-efficiency heating furnace for limestone calcination, characterized in that: It includes a preheating box (2) and a calcining furnace (5). A screw conveyor (4) is fixedly connected between the preheating box (2) and the calcining furnace (5). A filter structure (3) is embedded and connected between the preheating box (2) and the calcining furnace (5) in front of the screw conveyor (4). A crushing structure (1) is embedded and installed on the front surface of the preheating box (2).

2. The high-efficiency heating furnace for limestone calcination according to claim 1, characterized in that: The crushing structure (1) includes a crushing roller (101), a connecting shaft (102), and a servo motor (103). There are two sets of crushing rollers (101), and the connecting shaft (102) is fixedly installed on the front and rear surfaces of the crushing rollers (101).

3. The high-efficiency heating furnace for limestone calcination according to claim 2, characterized in that: The preheating box (2) includes a feed hopper (201), a first exhaust port (202), a box body (203), a first fuel inlet (204), a stirring motor (205), and a spiral stirring paddle (206). The feed hopper (201) is embedded in the upper surface of the box body (203), the stirring motor (205) is embedded in the lower surface of the box body (203), the spiral stirring paddle (206) is embedded in the upper surface of the stirring motor (205) inside the box body (203), the first exhaust port (202) is embedded in the upper side surface of the box body (203), and the first fuel inlet (204) is embedded in the lower side surface of the box body (203).

4. The high-efficiency heating furnace for limestone calcination according to claim 3, characterized in that: The servo motor (103) is embedded in the upper position of the front surface of the housing (203), and the crushing rollers (101) are all embedded in the inside of the housing (203).

5. The high-efficiency heating furnace for limestone calcination according to claim 4, characterized in that: The filter structure (3) includes a door panel (301), an adsorption layer (302), a first conveying pipe (303), a first filter screen (304), a second filter screen (305), a second conveying pipe (306), a filter box (307), a chute (308), and a slider (309). The front surface of the filter box (307) is hinged with the door panel (301). The first conveying pipe (303) is embedded on one side surface of the filter box (307), and the second conveying pipe (306) is embedded on the other side surface of the filter box (307). The filter box (307) has chute (308) on both the upper and lower surfaces. There are six sets of chute (308). The upper and lower surfaces of the adsorption layer (302), the first filter screen (304), and the second filter screen (305) are all fixedly installed with sliders (309). The sliders (309) are respectively embedded in the inside of the chute (308).

6. The high-efficiency heating furnace for limestone calcination according to claim 5, characterized in that: The calcining furnace (5) includes a second flue gas outlet (501), a furnace body (502), a second fuel inlet (503), and a discharge port (504). The discharge port (504) is installed on the lower side of one side surface of the furnace body (502), the second flue gas outlet (501) is installed on the upper side of the other side surface of the furnace body (502), and the second fuel inlet (503) is installed on the lower side of one side surface of the furnace body (502).

7. The high-efficiency heating furnace for limestone calcination according to claim 6, characterized in that: The spiral elevator (4) is embedded between the box (203) and the furnace body (502). The first conveying pipe (303) is embedded on one side of the box (203) in front of the spiral elevator (4). The adsorption layer (302) is embedded on one side of the furnace body (502) in front of the spiral elevator (4).

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