Rotary kiln hot gas recovery equipment for calcium oxide production

Abstract

The utility model discloses rotary kiln hot gas recovery equipment for calcium oxide production, which relates to the technical field of rotary kilns and is applied to a rotary kiln main body, a feed hopper is mounted on one side of the top of the rotary kiln main body, and the rotary kiln hot gas recovery equipment further comprises a fixed cylinder which is fixedly mounted in the center of one end of the rotary kiln main body and is communicated with the inside of the rotary kiln main body; the L-shaped pipe is fixedly inserted into the top of the fixed cylinder, and the other end of the L-shaped pipe is fixedly sleeved with a vertical pipe; the transverse pipe is fixedly inserted into the side, away from the L-shaped pipe, of the vertical pipe, and an annular box is fixedly mounted at the other end of the transverse pipe; the preheating hopper is fixedly installed at the top end of the feeding hopper, and the preheating hopper is located on the inner ring of the annular box; according to the utility model, heat generated by previous combustion in the rotary kiln main body is guided into the fixed cylinder, the L-shaped pipe, the vertical pipe, the transverse pipe, the preheating hopper and the annular box to enter the preheating hopper, and limestone in the preheating hopper can be preheated, so that the heating efficiency of the limestone is improved, and the use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to rotary kiln technical field, concretely is a rotary kiln heat recovery equipment for calcium oxide production. BACKGROUND

[0002] The rotary kiln for calcium oxide production is the main equipment for calcining limestone into calcium oxide, and is a long and slowly rotating cylindrical equipment. In the production of calcium oxide, the main function is to calcine uniform limestone particles at high temperature (usually about 1250 degrees Celsius) to decompose calcium carbonate in limestone into calcium oxide and carbon dioxide.

[0003] The existing rotary kiln for calcium oxide production is equipped with a vertical preheater, which can first preheat the limestone entering the rotary kiln for calcination, thereby improving the heating rate of the limestone in the rotary kiln. However, the vertical preheater is internally provided with an additional heating component, which increases the use cost and makes it impossible to utilize the hot gas discharged from the rotary kiln for preheating treatment of the limestone.

[0004] Therefore, we designed a rotary kiln heat recovery equipment for calcium oxide production to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a rotary kiln heat recovery equipment for calcium oxide production to solve the problems raised in the background.

[0006] To solve the above technical problems, the utility model provides a rotary kiln heat recovery equipment for calcium oxide production, which is applied to a rotary kiln main body, a feed hopper is installed on one side of the top of the rotary kiln main body, and further comprises,

[0007] The fixed cylinder is fixedly installed at the center of one end of the rotary kiln main body and is in communication with the interior of the rotary kiln main body;

[0008] The L-shaped pipe is fixedly inserted at the top of the fixed cylinder, and the other end is fixedly sleeved with a vertical pipe;

[0009] The horizontal pipe is fixedly inserted at the side away from the L-shaped pipe of the vertical pipe, and the other end is fixedly installed with a ring-shaped box;

[0010] The preheating hopper is fixedly installed at the top end of the feed hopper, and the preheating hopper is located in the inner ring of the ring-shaped box, a plurality of heat conducting pipes are fixedly inserted in the inner ring of the ring-shaped box, and the other end of the heat conducting pipe is fixedly inserted in the preheating hopper;

[0011] The support assembly is arranged in the preheating hopper and is used for supporting the limestone preheated in the preheating hopper.

[0012] Further, the number of the horizontal pipes is three, and the three horizontal pipes are fixedly inserted at equidistant positions on the side of the vertical pipe away from the L-shaped pipe.

[0013] Further, the support assembly comprises two support members, the two support members are rotatably arranged at positions close to the bottom of the two side walls in the preheating hopper, and opposite sides of the two support members are provided with gaps, and the two side walls in the preheating hopper are rotatably provided with electric push rods, and the other ends of the electric push rods are rotatably arranged at the bottom of the support members.

[0014] Further, the preheating hopper is symmetrically provided with mounting seats at positions close to the bottom of the two side walls, and the support members are rotatably arranged in the mounting seats.

[0015] Further, the two side walls in the preheating hopper are provided with fixing seats, the bottom of the support member is provided with a limiting seat, and the two ends of the electric push rod are rotatably arranged in the fixing seat and the limiting seat respectively.

[0016] Further, the mounting seat, the fixing seat and the limiting seat are respectively provided with a first pin shaft, a second pin shaft and a third pin shaft, one side of the support member is rotatably sleeved on the first pin shaft, and the two ends of the electric push rod are rotatably sleeved on the second pin shaft and the third pin shaft respectively.

[0017] Further, the material of the support member is tungsten.

[0018] Compared with the prior art, the preheating hopper can be preheated by guiding the heat generated by the previous combustion in the rotary kiln body into the fixed cylinder, the L-shaped pipe, the vertical pipe, the horizontal pipe, the preheating hopper and the annular box, so that the efficiency of heating the limestone is improved, and the use cost is reduced.

[0019] Compared with the prior art, the preheating hopper can be preheated by guiding the heat generated by the previous combustion in the rotary kiln body into the fixed cylinder, the L-shaped pipe, the vertical pipe, the horizontal pipe, the preheating hopper and the annular box, so that the efficiency of heating the limestone is improved, and the use cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the side surface of the utility model;

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the whole external part of the utility model;

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the internal half-section of the preheating hopper of the utility model;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the internal half-section of the preheating hopper of the utility model; Figure 3Enlarged view at A.

[0024] In the figure: 1, rotary kiln main body; 2, feed hopper; 3, fixed cylinder; 4, L-shaped pipe; 5, vertical pipe; 6, horizontal pipe; 7, preheating hopper; 8, annular box; 9, heat pipe; 10, support; 11, electric push rod; 12, mounting seat; 13, fixed seat; 14, limit seat. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Please refer to Figures 1-4 The utility model provides a kind of technical scheme: a rotary kiln heat recovery equipment for calcium oxide production, it is applied to rotary kiln main body 1, feed hopper 2 is installed in rotary kiln main body 1 top side, still include,

[0027] Fixed cylinder 3, fixedly installed in the center of one end of rotary kiln main body 1, and it is connected with the inside of rotary kiln main body 1;

[0028] L-shaped pipe 4, fixedly inserted in the top of fixed cylinder 3, and another end is fixedly sleeved with vertical pipe 5;

[0029] Horizontal pipe 6, fixedly inserted in the side of vertical pipe 5 away from L-shaped pipe 4, and another end is fixedly installed with annular box 8;

[0030] Preheating hopper 7, fixedly installed in the top end of feed hopper 2, and preheating hopper 7 is located in the inner ring of annular box 8, and the inner ring of annular box 8 is fixedly inserted with multiple heat pipes 9, and another end of heat pipe 9 is fixedly inserted in preheating hopper 7;

[0031] Supporting assembly, it is set in preheating hopper 7, and it is used to support the limestone preheated into preheating hopper 7.

[0032] Specific implementation, first, the rotary kiln for calcium oxide production and the electric appliance involved in feed hopper 2 are all externally connected power supply, then limestone is put into preheating hopper 7 and feed hopper 2, finally limestone falls into rotary kiln main body 1 and is calcined, to facilitate production of calcium oxide;The heat of previous combustion in rotary kiln main body 1 is introduced into fixed cylinder 3, L-shaped pipe 4, vertical pipe 5, horizontal pipe 6, preheating hopper 7 and annular box 8 into preheating hopper 7, can preheat limestone in preheating hopper 7, to not only improve the efficiency of limestone heating, but also reduce the use cost.

[0033] It should be noted that the rotary kiln body 1 typically consists of a cylinder, tire, support device, transmission device, kiln head hood, kiln tail hood, and sealing device. Its working principle is roughly as follows: material enters the rotary kiln from the high end of the kiln tail cylinder. Due to the inclination and slow rotation of the cylinder, the material tumbles circumferentially and moves axially from the high end to the low end. During this process, fuel is injected into the kiln from the kiln head and burned, transferring the heat to the material and causing a series of physicochemical changes, ultimately forming the finished clinker. Since the rotary kiln body 1 is existing technology, and this specification specifically refers to the heat recovery equipment rather than the rotary kiln itself, it will not be described in detail here.

[0034] See Figures 1-4 There are three horizontal pipes 6, and the three horizontal pipes 6 are fixedly inserted at equal intervals on the side of the vertical pipe 5 away from the L-shaped pipe 4. The setting of three horizontal pipes 6 indicates that there are also three annular boxes 8, which can preheat limestone piled at different heights in the preheating hopper 7, thereby improving the preheating effect of limestone.

[0035] See Figures 1-4 The support assembly includes two support members 10, which are rotatably mounted on the inner side walls of the preheating hopper 7 near the bottom. A gap is left on the opposite side of the two support members 10. Electric push rods 11 are rotatably mounted on the inner side walls of the feeding hopper 2. The other end of the electric push rods 11 is rotatably mounted on the bottom of the support members 10. Mounting seats 12 are symmetrically fixedly mounted on the inner side walls of the preheating hopper 7 near the bottom. The support members 10 are rotatably mounted in the mounting seats 12.

[0036] The inner two side walls of the feed hopper 2 are provided with fixed seats 13, and the bottom of the support member 10 is provided with a limiting seat 14. The two ends of the electric push rod 11 are respectively rotatably mounted in the fixed seat 13 and the limiting seat 14. The mounting base 12, the fixed seat 13 and the limiting seat 14 are respectively provided with a first pin, a second pin and a third pin. One side of the support member 10 is rotatably sleeved on the first pin, and the two ends of the electric push rod 11 are respectively rotatably sleeved on the second pin and the third pin.

[0037] In specific implementation, based on the above implementation, by activating the electric push rod 11, the drive end of the electric push rod 11 is shortened, causing the support member 10 to rotate downward around the first pin shaft as the axis. This facilitates the preheated limestone falling into the rotary kiln body 1 for calcination, ensuring the normal operation of the rotary kiln heat recovery equipment used for calcium oxide production.

[0038] See Figures 1-4 The support component 10 is made of tungsten. Since tungsten has a melting point of 3000℃, while the maximum temperature of the hot gas inside the rotary kiln body 1 is 1250℃, the support component 10 can operate normally in a high-temperature environment.

[0039] Working principle: Before use, the electrical components of the rotary kiln and feed hopper 2 used for calcium oxide production are all connected to an external power source. Then, limestone is put into the preheating hopper 7 and feed hopper 2. Finally, the limestone falls into the main body of the rotary kiln 1 for calcination, thus facilitating the production of calcium oxide.

[0040] During the feeding process, the two support members 10 are kept in a horizontal position to support the limestone. Then, the heat from the previous combustion in the rotary kiln body 1 will enter the preheating hopper 7 through the fixed cylinder 3, L-shaped pipe 4, vertical pipe 5, horizontal pipe 6, preheating hopper 7 and annular box 8, which can preheat the limestone in the preheating hopper 7, thereby not only improving the efficiency of limestone heating, but also reducing the operating cost.

[0041] Turning on the electric push rod 11 shortens the drive end of the electric push rod 11, causing the support 10 to rotate downwards around the first pin. This facilitates the preheated limestone falling into the rotary kiln body 1 for calcination, ensuring the normal operation of the rotary kiln heat recovery equipment used for calcium oxide production.

Claims

1. A rotary kiln heat recovery device for calcium oxide production, applied to the main body (1) of a rotary kiln, wherein a feed hopper (2) is installed on one side of the top of the main body (1), characterized in that, It also includes, The fixed cylinder (3) is fixedly installed at the center of one end of the rotary kiln body (1) and is connected to the inside of the rotary kiln body (1); The L-shaped tube (4) is fixedly inserted into the top of the fixed cylinder (3), and the other end is fixedly sleeved with a vertical tube (5). The horizontal tube (6) is fixedly inserted into the side of the vertical tube (5) away from the L-shaped tube (4), and the other end is fixedly installed with an annular box (8). The preheating hopper (7) is fixedly installed at the top of the feed hopper (2), and the preheating hopper (7) is located in the inner ring of the annular box (8). Multiple heat-conducting pipes (9) are fixedly inserted into the inner ring of the annular box (8), and the other end of the heat-conducting pipes (9) is fixedly inserted into the preheating hopper (7). A support assembly is provided inside the preheating hopper (7) and is used to support limestone that enters the preheating hopper (7) for preheating.

2. The rotary kiln heat recovery equipment for calcium oxide production as described in claim 1, characterized in that: The number of horizontal tubes (6) is three, and the three horizontal tubes (6) are fixedly inserted at equal intervals on the side of the vertical tube (5) away from the L-shaped tube (4).

3. The rotary kiln heat recovery equipment for calcium oxide production as described in claim 1, characterized in that: The support assembly includes two support members (10), which are rotatably disposed on the inner side walls of the preheating hopper (7) near the bottom. There is a gap on the opposite side of the two support members (10). Electric push rods (11) are rotatably disposed on the inner side walls of the feeding hopper (2), and the other end of the electric push rods (11) is rotatably disposed at the bottom of the support members (10).

4. The rotary kiln heat recovery equipment for calcium oxide production as described in claim 3, characterized in that: The preheating hopper (7) has mounting bases (12) symmetrically fixedly installed on both sides near the bottom, and the support (10) is rotatably set in the mounting bases (12).

5. The rotary kiln heat recovery equipment for calcium oxide production as described in claim 4, characterized in that: The inner two sides of the feed hopper (2) are provided with fixed seats (13), and the bottom of the support member (10) is provided with a limiting seat (14). The two ends of the electric push rod (11) are respectively rotatably arranged in the fixed seat (13) and the limiting seat (14).

6. The rotary kiln heat recovery equipment for calcium oxide production as described in claim 5, characterized in that: The mounting base (12), the fixing base (13), and the limiting base (14) are respectively provided with a first pin, a second pin, and a third pin. One side of the support member (10) is rotatably sleeved on the first pin, and both ends of the electric push rod (11) are rotatably sleeved on the second pin and the third pin, respectively.

7. The rotary kiln heat recovery equipment for calcium oxide production as described in claim 3, characterized in that: The support member (10) is made of tungsten.

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