Kiln body of internal combustion cross flow type sleeve kiln

Abstract

The utility model relates to the technical field of industrial furnaces and kilns, in particular to a kiln body of an internal combustion cross-flow type sleeve kiln. Comprising a main kiln body, a combustion cavity is formed in the middle of the main kiln body, a material channel allowing materials to fall is formed between the combustion cavity and the main kiln body, the top end and the middle of the combustion cavity are blocked, an upper section cavity and a lower section cavity are formed, and the outer portion of the main kiln body is sequentially sleeved with two air guide outer sleeves; the gas guide outer sleeve is communicated with the combustion cavity through the material channel; after high-temperature flue gas penetrates through materials from the lower portion of the main kiln body, the high-temperature flue gas directly flows upwards along the gas guide outer sleeve and enters the main kiln body again, and the flowing smoothness of gas flow and the uniformity of contact between the gas flow and the materials can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial furnaces and kilns, in particular to a kiln body of an internal combustion cross-flow sleeve kiln. Background Art

[0002] In the process of mining and mineral material production and processing, a large amount of unusable small-particle tailings, industrial waste slag, scraps and powders will be generated, such as limestone tailings, magnesite tailings, siderite, industrial gypsum, phosphate tailings, carbide slag, kaolin, sulfur concentrate, ceramsite, sugar mud and garbage. When the existing calcining furnace equipment processes small-particle materials such as scraps and powders of 5 to 20 mm, the high-temperature flue gas passes through the material once and is guided by the smoke collection pipe to the upper area for penetration treatment again. However, there are problems such as poor flue gas flow and uneven contact with the material, which affects the processing of the material. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a kiln body of an internal combustion cross-flow sleeve kiln in response to the above-mentioned technical deficiencies. After the high-temperature flue gas penetrates the material from the bottom of the main kiln body, it flows directly upward along the air guide sleeve and enters the main kiln body again, which can effectively improve the smoothness of the air flow and the uniformity of contact with the material.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model includes:

[0005] A main kiln body, wherein a combustion chamber is provided in the middle of the main kiln body, a material channel for materials to fall is formed between the combustion chamber and the main kiln body, and the top and the middle of the combustion chamber are blocked to form an upper and a lower cavity, and two air guide sleeves are sequentially sleeved on the outside of the main kiln body, and the air guide sleeves are connected with the combustion chamber through the material channel.

[0006] Preferably, a material storage chamber communicating with the interior is provided above the main kiln body.

[0007] Preferably, a manhole passage for personnel to enter is provided below the main kiln body.

[0008] Preferably, a combustion chamber is provided at the lower end of the combustion cavity, and the combustion chamber has evenly distributed air distribution holes.

[0009] Preferably, a plurality of ventilation holes are evenly arranged on the main kiln body and the combustion chamber.

[0010] Preferably, the main kiln body is divided into multiple sections in sequence along the axial direction, and two adjacent sections are connected by a steel structure.

[0011] Preferably, sealing members are provided at the top and middle of the combustion chamber.

[0012] Preferably, the air guide jacket located above is provided with a smoke exhaust hole.

[0013] Preferably, the horizontal cross-section of the air guide sleeve is in the shape of a circular ring.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. After the high-temperature flue gas penetrates the material, it flows upward directly along the space between the air guide jacket and the outer wall of the main kiln body, effectively improving the smoothness of the airflow. The high-temperature flue gas re-enters through the exhaust holes on the main kiln body, which can improve the uniformity of contact with the material and maintain the temperature stability, avoiding the occurrence of local high temperature.

[0016] 2. By installing a storage chamber above the main kiln body, the effect of pre-storing materials can be achieved, which can maintain continuous material supply to the main kiln body and improve the continuity and stability of material supply;

[0017] 3. By installing a manhole channel in the lower area of ​​the main kiln body, the problem that personnel cannot enter the existing kiln body for maintenance is solved, and the rationality and practicality of the overall structure are improved;

[0018] 4. By adding multiple air distribution holes in the combustion chamber and providing upward airflow, the granular fuel can be blown up and burned during the fuel combustion process, thereby improving the applicability and meeting the use of different fuels such as biomass fuel and coal particles. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of a kiln body of an internal combustion cross-flow sleeve kiln;

[0020] Figure 2 It is a schematic diagram of the whole cross section;

[0021] Figure 3 This is a schematic diagram of the main kiln body;

[0022] Figure 4 It is a structural schematic diagram of the combustion chamber;

[0023] Figure 5 It is a schematic diagram of the combustion chamber structure;

[0024] Figure 6 This is a schematic diagram of the kiln installation.

[0025] In the figure: 1. main kiln body; 2. combustion chamber; 3. material channel; 4. air guide jacket; 5. air vent; 101. material storage chamber; 102. manhole passage; 201. combustion chamber; 202. air distribution hole; 203. sealing part; 401. smoke exhaust hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0027] Specific implementation method 1: Combination Figure 1-6 As shown, a kiln body of an internal combustion cross-flow sleeve kiln comprises: a main kiln body 1, a combustion chamber 2 is fixed in the middle of the main kiln body 1, a material channel 3 for materials to fall is formed between the combustion chamber 2 and the main kiln body 1, and the top and middle of the combustion chamber 2 are blocked to form an upper and lower cavity, and two air guide sleeves 4 are sequentially sleeved on the outside of the main kiln body 1, and the air guide sleeve 4 is connected with the combustion chamber 2 through the material channel 3. The high-temperature flue gas moves upward from the bottom of the combustion chamber 2, and after reaching the middle blocking position, it diffuses and penetrates to the outside to realize the material processing inside the material channel 3, and moves to the air guide sleeve 4 below after penetrating. , and then moves upward along the space between the air guide jacket 4 and the outer wall of the main kiln body 1. After reaching the top of the current air guide jacket 4, it penetrates the material channel 3 again, and enters the upper cavity of the combustion chamber 2 again to move upward. After reaching the topmost blocking position, it penetrates the material channel 3 again, and enters the upper air guide jacket 4 for discharge, realizing multiple operations on the material. At the same time, the high-temperature flue gas moves more smoothly along the air guide jacket 4, and enters the material channel 3 again from all directions outside the main kiln body 1, which improves the penetration efficiency and the uniformity of contact with the material, and avoids the situation where the local temperature is too high.

[0028] A preferred embodiment, combined with Figure 1 and Figure 2 As shown, by adding a section of kiln body with a truncated cone-shaped cross section to the top of the main kiln body 1, a storage chamber 101 connected to the material channel is formed to achieve temporary storage of part of the material and automatic distribution of the material by weight.

[0029] A preferred embodiment, combined with Figure 1 and Figure 2 As shown, a manhole passage 102 for personnel to enter is provided below the main kiln body 1, providing a space for personnel to enter, so that when a fault occurs inside the main kiln body 1, personnel can enter to perform inspection and maintenance operations, thereby improving practicality.

[0030] A preferred embodiment, combined with Figure 2 and Figure 4As shown, a combustion chamber 201 is installed at the lower end of the combustion chamber 2, and a plurality of evenly distributed air distribution holes 202 are provided above the combustion chamber 201. The ignition device in the combustion chamber 201 ignites the fuel, and the air distribution holes 202 generate an upward airflow to promote the flow of air and blow up the granular fuel, thereby meeting the use requirements of different fuels and improving applicability.

[0031] A preferred embodiment, in combination with Figure 2 and Figure 5 As shown, a plurality of ventilation holes 5 are evenly provided on the main kiln body 1 and the combustion chamber 2 to achieve internal circulation and provide space for high-temperature flue gas to pass through.

[0032] A preferred embodiment, in combination with Figure 2 , Figure 3 and Figure 5 As shown, the main kiln body 1 is divided into multiple sections along the axial direction, and two adjacent sections are connected by steel structures. The steel structure is in a circular ring shape as a whole, and ribs connected to the combustion chamber 2 are processed on the inner circular ring arm. By dividing the main kiln body 1 into multiple sections, when a part needs maintenance, the brick structure of this part can be dismantled and repaired without causing the collapse of the entire main kiln body, reducing the difficulty of maintenance and improving stability.

[0033] A preferred embodiment, in combination with Figure 2 , Figure 3 and Figure 5 As shown, blocking members 203 are provided at the top and middle positions of the combustion chamber 2, and the blocking members 203 divide the combustion chamber 2 into an upper cavity and a lower cavity.

[0034] A preferred embodiment, in combination with Figure 1 As shown, a smoke exhaust hole 401 is provided on the upper air guide jacket 4, and the smoke exhaust hole 401 is connected to the smoke treatment system through a pipeline to achieve smoke treatment.

[0035] In a preferred embodiment, the horizontal cross-section of the air guide sleeve 4 is in the shape of a circular ring, so that the high-temperature flue gas can flow along the space between the air guide sleeve 4 and the main kiln body 1, thereby improving the fluidity of the airflow, and when entering the main kiln body 1, it can enter from all directions outside the main kiln body 1, thereby improving the uniformity of contact with the material and avoiding different material processing states caused by local excessive temperature.

[0036] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A kiln body of an internal combustion cross-flow sleeve kiln, characterized in that: include: A main kiln body (1) is provided with a combustion chamber (2) in the middle of the main kiln body (1), a material channel (3) for materials to fall is formed between the combustion chamber (2) and the main kiln body (1), and the top and middle of the combustion chamber (2) are blocked to form an upper and lower cavity, and two air guide sleeves (4) are sequentially sleeved on the outside of the main kiln body (1), and the air guide sleeves (4) are in communication with the combustion chamber (2) through the material channel (3).

2. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: A material storage chamber (101) communicating with the interior is provided above the main kiln body (1).

3. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: A manhole passage (102) for personnel to enter is provided below the main kiln body (1).

4. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: A combustion chamber (201) is provided at the lower end of the combustion cavity (2), and the combustion chamber (201) has evenly distributed air distribution holes (202).

5. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: A plurality of ventilation holes (5) are evenly arranged on the main kiln body (1) and the combustion chamber (2).

6. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: The main kiln body (1) is divided into multiple sections in sequence along the axial direction, and two adjacent sections are connected by a steel structure.

7. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: The top and middle of the combustion chamber (2) are both provided with blocking pieces (203).

8. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: The air guide jacket (4) located at the top is provided with a smoke exhaust hole (401).

9. The kiln body of an internal combustion cross-flow sleeve kiln according to claim 1, characterized in that: The horizontal cross-section of the air guide jacket (4) is in the shape of a circular ring.

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