A calcium oxide kiln waste heat recovery and preheating equipment

Abstract

The present invention relates to the technical field of calcium oxide production equipment, specifically a calcium oxide kiln waste heat recovery and preheating equipment, including a calcining box, the calcining box is hinged with a door body, and also includes: a combustion module connected to the calcining box; a synchronous stirring bearing structure installed in the calcining box, the synchronous stirring bearing structure includes a lifting drive part fixedly installed at the lower part of the calcining box, and a loading mechanism is installed on the lifting drive part, and the loading mechanism includes a plurality of groups of powder loading components stacked vertically; a hot air preheating structure connected to the calcining box. The present invention preheats the subsequently added limestone powder through the hot air preheating structure to recover heat energy, and through the cooperation of the synchronous stirring bearing structure and the hot air preheating structure, the processed calcium oxide is taken out and new limestone is added to the bottom of the powder loading component, so as to facilitate the orderly completion of the processing of the calcium oxide and the addition of the limestone to be processed, and avoid the production of over-fired lime.

Description

Technical Field

[0001] The invention relates to the technical field of calcium oxide production equipment, in particular to a calcium oxide kiln waste heat recovery and preheating device. Background Art

[0002] Calcium oxide is an inorganic compound, commonly known as quicklime. Its physical properties are white powder on the surface. The impure one is off-white. It is light yellow or gray when it contains impurities. It is hygroscopic. The original lime production process is to lay limestone and fuel in layers, ignite and calcine for a period of time. Modern production uses mechanized and semi-mechanized vertical kilns, rotary kilns, boiling furnaces and other equipment, and the calcination time is shortened accordingly.

[0003] In the production and preparation of calcium oxide, limestone is usually calcined at high temperature, so that the limestone decomposes at high temperature to produce calcium oxide and carbon dioxide. The calcination of limestone is usually achieved in a coal-fired lime kiln. Due to the high temperature inside the calcining kiln body, the direct discharge of the high-temperature exhaust gas generated by the calcining kiln body will cause heat waste. At the same time, because the hot air will rise, the limestone at the top will be heated to calcium oxide before the limestone at the bottom of the kiln. As time goes on, it will cause the formation of over-burned lime. Summary of the invention

[0004] The object of the present invention is to provide a calcium oxide kiln waste heat recovery and preheating device to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A calcium oxide kiln waste heat recovery and preheating device comprises a calcining box, the calcining box is hinged with a door body, and further comprises:

[0007] A combustion module connected to the calcining box;

[0008] A synchronous stirring bearing structure installed in the calcining box, the synchronous stirring bearing structure includes a lifting drive part fixedly installed at the lower part of the calcining box, a loading mechanism is installed on the lifting drive part, the loading mechanism includes a plurality of groups of powder loading components stacked longitudinally, the lowest powder loading component in the loading mechanism is installed on the lifting drive part, the powder loading component includes a powder loading box, the powder loading box is fixedly connected to a rotating limit frame, the rotating limit frame is rotatably connected to a friction rotating frame, a plurality of groups of stirring rods are fixedly installed on the friction rotating frame, the powder loading box is fixedly connected to an insert, the powder loading box is provided with a groove matched with the insert, two adjacent groups of friction rotating frames transmit torque by abutting each other, and the calcining box is fixedly connected to two groups of first active telescopic frames;

[0009] A hot air preheating structure connected to the calcining box comprises a material receiving mechanism installed on the top of the calcining box, the material receiving mechanism is connected to a material feeding mechanism through a heat conducting air mechanism, and the material feeding mechanism is installed on the door body.

[0010] As a further improvement scheme of the present invention: the combustion module includes a plurality of fixed frames fixedly connected to the calcining box, the fixed frames are fixedly connected to the second active telescopic rod, the movable end of the second active telescopic rod is fixedly connected to the sliding frame slidably connected to the fixed frame, the sliding frame is fixedly connected to two groups of racks, the racks are meshingly connected to the gear rings, the gear rings are coaxially fixedly connected to the linkage frame rotatably connected to the fixed frame, the linkage frame is fixedly connected to the arc-shaped flame-spraying head, and the arc-shaped flame-spraying head is connected to the fuel tank fixedly connected to the calcining box through a hose.

[0011] As a further improvement scheme of the present invention: the lifting drive part includes multiple groups of first active telescopic rods fixedly installed at the lower part of the calcining box, the movable end of the first active telescopic rod is fixedly connected to a lifting platform, the lifting platform is movably connected to a group of powder carrying boxes, the lifting platform is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a friction plate, and the friction plate is abutted against the friction rotating frame of the lowest powder carrying assembly in the loading mechanism.

[0012] As a further improvement of the present invention: the material receiving mechanism includes an electric gate fixedly installed on the top of the calcining box, an isolation cover fixedly connected to the calcining box is arranged above the electric gate, the isolation cover is fixedly connected to two groups of symmetrically arranged second active telescopic frames, a pressure relief valve is fixedly installed on the isolation cover, the isolation cover is connected to the heat-conducting air mechanism, and the isolation cover is hinged with an isolation door.

[0013] As a further improvement of the present invention: the heat-conducting air mechanism includes an exhaust fan fixedly connected to the isolation cover, and the exhaust fan is fixedly connected to the feeding mechanism through a conduit.

[0014] As a further improvement of the present invention: the feeding mechanism includes an open box fixedly connected to the door body, the open box is fixedly connected to the duct, the open box is fixedly connected to a third active telescopic frame, a cover plate is movably installed on the opening of the open box, the open box is fixedly connected to a smoke exhaust fan, and the smoke exhaust fan is fixedly connected to a smoke guide pipe.

[0015] As a further improvement of the present invention: a handle is fixedly mounted on the powder carrying box.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The limestone powder is loaded into the powder loading box, and the combustion module performs heat release operation to heat the limestone in the powder loading box. The lifting drive unit drives the friction rotating frame at the bottom of the loading mechanism to rotate by friction, so that the other friction rotating frames rotate synchronously, thereby driving the stirring rod to stir, so that the stirring rod stirs the limestone in the powder loading box, which is convenient for the discharge of carbon dioxide and improves the uniformity of heating of the limestone powder. During this period, the receiving mechanism sends the rising flue gas into the feeding mechanism through the heat-conducting air mechanism, and places the powder loading assembly to be loaded into the calcining box into the feeding mechanism, thereby The limestone powder to be heated is preheated to recover heat energy. As the limestone in the uppermost powder-carrying component in the loading mechanism is heated to calcium oxide, the lifting drive unit lifts the loading mechanism so that the uppermost powder-carrying component enters the receiving mechanism, and the first active telescopic frame lifts the lowermost powder-carrying component in the loading mechanism by extension, and then the feeding mechanism pushes the preheated powder-carrying component to the bottom of the lifted loading mechanism, and then as the first active telescopic frame contracts, the loading mechanism falls and gets stuck on the powder-carrying component on the lifting drive unit, and then the powder-carrying component in the receiving mechanism is taken out to complete the filling and receiving operations. The present invention preheats the subsequently added limestone powder through a hot air preheating structure to recover heat energy, and through the cooperation of the synchronous stirring bearing structure and the hot air preheating structure, the processed calcium oxide is taken out and new limestone is added to the bottom of the powder-carrying component, thereby facilitating the orderly completion of the processed calcium oxide and the addition of the limestone to be processed, and avoiding the generation of over-burned lime. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a plan view schematic diagram of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure when the isolation door of the present invention is lifted;

[0021] Figure 4 It is a schematic diagram of the structure of the powder carrier assembly and the combustion module in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the powder carrier assembly and the combustion module in the present invention;

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the lifting platform, motor and friction plate of the present invention.

[0024] In the figure: 1, calcining box; 2, door body; 3, combustion module; 4, synchronous stirring bearing structure; 5, lifting drive unit; 6, loading mechanism; 7, powder loading assembly; 8, powder loading box; 9, rotation limit frame; 10, friction rotation frame; 11, stirring rod; 12, insert; 13, groove; 14, first active telescopic frame; 15, hot air preheating structure; 16, material receiving mechanism; 17, heat conduction air mechanism; 18, feeding mechanism; 19, fixed frame; 20, second active telescopic rod; 21, sliding frame; 22, gear strip; 23, gear ring; 24, linkage frame; 25, arc-shaped flame head; 26, hose; 27, fuel tank; 28, first active telescopic rod; 29, lifting platform; 30, motor; 31, friction plate; 32, electric gate; 33, isolation cover; 34, second active telescopic frame; 35, pressure relief valve; 36, isolation door; 37, exhaust fan; 38, duct; 39, opening box; 40, third active telescopic frame; 41, cover plate; 42, smoke exhaust fan; 43, smoke guide pipe; 44, handle; 45, smoke partition board. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0026] Example 1, see Figure 1 to Figure 6 As shown, a calcium oxide kiln waste heat recovery and preheating device includes a calcining box 1, the calcining box 1 is hinged with a door body 2, and also includes:

[0027] A combustion module 3 connected to the calcining box 1;

[0028] a synchronous stirring bearing structure 4 installed in the calcining box 1, the synchronous stirring bearing structure 4 includes a lifting drive part 5 fixedly installed at the lower part of the calcining box 1, a loading mechanism 6 is installed on the lifting drive part 5, the loading mechanism 6 includes a plurality of groups of powder loading components 7 stacked longitudinally, the lowest powder loading component 7 in the loading mechanism 6 is installed on the lifting drive part 5, the powder loading component 7 includes a powder loading box 8, the powder loading box 8 is fixedly connected to a rotation limit frame 9, the rotation limit frame 9 is rotatably connected to a friction rotating frame 10, a plurality of groups of stirring rods 11 are fixedly installed on the friction rotating frame 10, the powder loading box 8 is fixedly connected to an insert 12, a groove 13 adapted to the insert 12 is provided on the powder loading box 8, the relative position of the powder loading box 8 is limited by inserting the insert 12 into the adjacent groove 13, the two adjacent groups of friction rotating frames 10 transmit torque by abutting each other, and the calcining box 1 is fixedly connected to two groups of first active telescopic frames 14;

[0029] The hot air preheating structure 15 connected to the calcining box 1 includes a material receiving mechanism 16 installed on the top of the calcining box 1 . The material receiving mechanism 16 is connected to a feeding mechanism 18 via a heat-conducting air mechanism 17 . The feeding mechanism 18 is installed on the door body 2 .

[0030] The limestone powder is loaded into the powder loading box 8, and the combustion module 3 performs heat release operation to heat the limestone in the powder loading box 8. The lifting drive unit 5 drives the friction rotating frame 10 at the bottom of the loading mechanism 6 to rotate by friction, so that the other friction rotating frames 10 rotate synchronously, thereby driving the stirring rod 11 to stir, so that the stirring rod 11 stirs the limestone in the powder loading box 8, which is convenient for the discharge of carbon dioxide and improves the uniformity of the heating of the limestone powder. During this period, the receiving mechanism 16 sends the rising flue gas into the feeding mechanism 18 through the heat-conducting wind mechanism 17, and the powder loading assembly 7 to be loaded into the calcining box 1 is placed in the feeding mechanism 18, thereby the powder loading assembly 7 and the powder loading assembly 7 in the feeding mechanism 18 are The limestone powder to be heated in the component 7 is preheated to recover heat energy. As the limestone in the uppermost powder carrier component 7 in the loading mechanism 6 is heated to calcium oxide, the lifting drive unit 5 lifts the loading mechanism 6 so that the uppermost powder carrier component 7 enters the receiving mechanism 16, and the first active telescopic frame 14 lifts the lowermost powder carrier component 7 in the loading mechanism 6 by extending, and then the feeding mechanism 18 pushes the preheated powder carrier component 7 to the bottom of the lifted loading mechanism 6, and then as the first active telescopic frame 14 contracts, the loading mechanism 6 falls and gets stuck on the powder carrier component 7 on the lifting drive unit 5, and then the powder carrier component 7 in the receiving mechanism 16 is taken out to complete the filling and collecting operations. The present invention preheats the subsequently added limestone powder through the hot air preheating structure 15 to recover heat energy, and through the synchronous stirring of the support structure 4 and the hot air preheating structure 15, the processed calcium oxide is removed and new limestone is added to the bottom of the powder carrier component 7, thereby facilitating the orderly removal of the processed calcium oxide and the addition of the limestone to be processed, and avoiding the generation of over-burned lime.

[0031] In one case of the present embodiment, the combustion module 3 includes a plurality of fixed frames 19 fixedly connected to the calcining box 1, the fixed frame 19 is fixedly connected to a second active telescopic rod 20, the movable end of the second active telescopic rod 20 is fixedly connected to a sliding frame 21 slidably connected to the fixed frame 19, the sliding frame 21 is fixedly connected to two groups of racks 22, the racks 22 are meshingly connected to a gear ring 23, the gear ring 23 is coaxially fixedly connected to a linkage frame 24 rotatably connected to the fixed frame 19, the linkage frame 24 is fixedly connected to an arc-shaped flame head 25, and the arc-shaped flame head 25 is connected to a fuel tank 27 fixedly connected to the calcining box 1 through a hose 26. The fuel tank 27 supplies fuel to the arc-shaped flame head 25 through the hose 26, and the arc-shaped flame head 25 ignites the fuel and sprays flames to the powder carrier box 8, so that the powder carrier box 8 is heated. The second active telescopic rod 20 drives the sliding frame 21 to move, the sliding frame 21 drives the rack 22 to move, the rack 22 drives the gear ring 23 to rotate, so that the linkage frame 24 rotates, thereby causing the arc-shaped flame heads 25 to rotate and move away from each other, so that it is convenient for personnel to directly take out the loading mechanism 6 after opening the door body 2.

[0032] In one case of this embodiment, the lifting drive unit 5 includes a plurality of first active telescopic rods 28 fixedly mounted at the lower part of the calcining box 1, the movable end of the first active telescopic rod 28 is fixedly connected to a lifting platform 29, the lifting platform 29 is movably connected to a group of powder carrying boxes 8, the lifting platform 29 is fixedly connected to a motor 30, the output shaft of the motor 30 is fixedly connected to a friction plate 31, and the friction plate 31 is in contact with the friction rotating frame 10 of the powder carrying assembly 7 at the bottom of the loading mechanism 6. The first active telescopic rod 28 is used to lift the lifting platform 29, the motor 30 drives the friction plate 31 to rotate, and the rotating friction plate 31 drives the friction rotating frame 10 to rotate.

[0033] In one case of the present embodiment, the material receiving mechanism 16 includes an electric gate 32 fixedly mounted on the top of the calcining box 1, an isolation cover 33 fixedly connected to the calcining box 1 is arranged above the electric gate 32, the isolation cover 33 is fixedly connected to two sets of second active telescopic frames 34 symmetrically arranged, a pressure relief valve 35 is fixedly mounted on the isolation cover 33, the isolation cover 33 is connected to the heat-conducting wind mechanism 17, and the isolation cover 33 is hinged with an isolation door 36. After a group of powder-carrying components 7 enter the isolation cover 33, the second active telescopic frame 34 extends to the bottom of the powder-carrying components 7, and then the electric gate 32 performs a closing operation to prevent hot air from entering the isolation cover 33, and because the hot air in the isolation cover 33 is extracted by the heat-conducting wind mechanism 17, the temperature of the air in the isolation cover 33 will be reduced, so as to avoid burns to personnel by the ejected hot air when the isolation door 36 is opened.

[0034] In one case of this embodiment, the heat-conducting air mechanism 17 includes an exhaust fan 37 fixedly connected to the isolation cover 33, and the exhaust fan 37 is fixedly connected to the feeding mechanism 18 through a conduit 38. The exhaust fan 37 extracts the hot air in the isolation cover 33 and transports the hot air into the feeding mechanism 18 through the conduit 38.

[0035] In one case of this embodiment, the feeding mechanism 18 includes an open box 39 fixedly connected to the door body 2, the open box 39 is fixedly connected to the duct 38, a smoke partition plate is hinged in the open box 39, the open box 39 is fixedly connected to a third active telescopic frame 40, a cover plate 41 is movably installed on the opening of the open box 39, the open box 39 is fixedly connected to a smoke exhaust machine 42, the smoke exhaust machine 42 is used to extract smoke, and the smoke exhaust machine 42 is fixedly connected to a smoke guide pipe 43. The third active telescopic frame 40 is used to push the powder carrier assembly 7 in the open box 39 toward the lifting drive unit 5.

[0036] Embodiment 2, based on embodiment 1, refer to Figure 4 and Figure 5 A handle 44 is fixedly mounted on the powder carrying box 8. By arranging the handle 44 on the powder carrying box 8, it is convenient for personnel to move the powder carrying box 8.

[0037] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A calcium oxide kiln waste heat recovery and preheating device, comprising a calcining box, the calcining box is hinged with a door body, characterized in that: Also includes: A combustion module connected to the calcining box; A synchronous stirring bearing structure installed in the calcining box, the synchronous stirring bearing structure includes a lifting drive part fixedly installed at the lower part of the calcining box, a loading mechanism is installed on the lifting drive part, the loading mechanism includes a plurality of groups of powder loading components stacked longitudinally, the lowest powder loading component in the loading mechanism is installed on the lifting drive part, the powder loading component includes a powder loading box, the powder loading box is fixedly connected to a rotating limit frame, the rotating limit frame is rotatably connected to a friction rotating frame, a plurality of groups of stirring rods are fixedly installed on the friction rotating frame, the powder loading box is fixedly connected to an insert, the powder loading box is provided with a groove matched with the insert, two adjacent groups of friction rotating frames transmit torque by abutting each other, and the calcining box is fixedly connected to two groups of first active telescopic frames; A hot air preheating structure connected to the calcining box comprises a material receiving mechanism installed on the top of the calcining box, the material receiving mechanism is connected to a material feeding mechanism through a heat conducting air mechanism, and the material feeding mechanism is installed on the door body.

2. The calcium oxide kiln waste heat recovery and preheating equipment according to claim 1 is characterized in that: The combustion module includes a plurality of fixed frames fixedly connected to the calcining box, the fixed frames are fixedly connected to a second active telescopic rod, the movable end of the second active telescopic rod is fixedly connected to a sliding frame slidably connected to the fixed frame, the sliding frame is fixedly connected to two groups of racks, the racks are meshingly connected to a gear ring, the gear ring is coaxially fixedly connected to a linkage frame rotatably connected to the fixed frame, the linkage frame is fixedly connected to an arc-shaped flame-spraying head, and the arc-shaped flame-spraying head is connected to a fuel tank fixedly connected to the calcining box through a hose.

3. The calcium oxide kiln waste heat recovery and preheating equipment according to claim 1 is characterized in that: The lifting drive part includes multiple groups of first active telescopic rods fixedly installed at the lower part of the calcining box, the movable end of the first active telescopic rod is fixedly connected to a lifting platform, the lifting platform is movably connected to a group of powder carrying boxes, the lifting platform is fixedly connected to a motor, the output shaft of the motor is fixedly connected to a friction plate, and the friction plate is in contact with the friction rotating frame of the lowest powder carrying assembly in the loading mechanism.

4. The calcium oxide kiln waste heat recovery and preheating equipment according to claim 1 is characterized in that: The material receiving mechanism includes an electric gate fixedly installed on the top of the calcining box, an isolation cover fixedly connected to the calcining box is arranged above the electric gate, the isolation cover is fixedly connected to two groups of second active telescopic frames symmetrically arranged, a pressure relief valve is fixedly installed on the isolation cover, the isolation cover is connected to the heat-conducting air mechanism, and the isolation cover is hinged with an isolation door.

5. The calcium oxide kiln waste heat recovery and preheating equipment according to claim 4 is characterized in that: The heat-conducting air mechanism comprises an exhaust fan fixedly connected to the isolation cover, and the exhaust fan is fixedly connected to the feeding mechanism through a conduit.

6. The calcium oxide kiln waste heat recovery and preheating equipment according to claim 5 is characterized in that: The feeding mechanism includes an open box fixedly connected to the door body, the open box is fixedly connected to the duct, the open box is fixedly connected to a third active telescopic frame, a cover plate is movably installed on the opening of the open box, the open box is fixedly connected to a smoke exhaust fan, and the smoke exhaust fan is fixedly connected to a smoke guide pipe.

7. The calcium oxide kiln waste heat recovery and preheating equipment according to claim 1 is characterized in that: A handle is fixedly mounted on the powder carrying box.

Images