Lime discharging adjusting device of lime kiln

Abstract

The utility model relates to the technical field of lime kilns, in particular to a lime kiln ash discharging adjusting device which comprises a plurality of ash blocking rake teeth movably installed on the outer wall of a conical shell at the bottom of a vertical lime kiln and a plurality of control mechanisms. The multiple dust blocking rake teeth are distributed in the circumferential direction of the conical shell, and each dust blocking rake tooth can swing up and down relative to the conical shell. Each dust blocking rake tooth is arc-shaped, and the radian of each dust blocking rake tooth is matched with the arc of the conical shell; the multiple control mechanisms are installed on a shell of the lime kiln at intervals in the circumferential direction of the lime kiln, and each control mechanism is connected with the corresponding ash blocking rake tooth and can independently control the corresponding ash blocking rake tooth to be opened and closed. According to the utility model, the lime kiln ash discharging adjusting device is arranged on the existing vertical lime kiln using the spiral cone ash discharging machine, so that the phenomenon of kiln deflection can be solved by adjusting discharging, and the practicability is strong.

Description

Technical Field

[0001] The utility model relates to the technical field of lime kilns, in particular to a lime kiln ash unloading regulating device. Background Art

[0002] A skewed kiln refers to uneven temperature on the horizontal surface of the kiln. The temperature difference on the horizontal sections in the four directions of the southeast, northwest and northeast of the kiln chamber is called a skewed kiln. The skewed burning is caused by uneven mixing, uneven distribution and uneven ash discharge. Uneven mixing and uneven distribution will cause large differences in the calcination temperature and decomposition rate of limestone in the vertical kiln. Raw lime has a high specific gravity, and the material with a high specific gravity has a tendency to move ahead, sink quickly, and form a channel in a certain direction of the vertical density; while the better the lime is burned, the smaller its specific gravity is and the slower it sinks, causing the lime to be overburned and nodulated. At the same time, the skewed burning or uneven ash discharge of the vertical kiln will cause the parts with large activity to have small resistance and fast upwind speed; the parts with small activity to have large resistance and slow upwind speed, causing the hot combustion air to deviate more, which in turn leads to aggravated tilt, forming a vicious circle. The skewed kiln of the lime kiln will not only damage the lime kiln wall and smelt the kiln, but also cause the waste of limestone and coke during raw burning and overburning, and the unstable CO2 content during the skewed kiln will affect the production indicators. Therefore, it is particularly necessary to solve the skewed kiln problem.

[0003] At present, the ash unloading in the lime kiln is mainly carried out by a screw cone ash unloader, which is arranged at the bottom of the kiln body and drives the unloading through the rotation of the screw cone ash unloader. When the ash falls into the lowest step of the screw cone ash unloader, the baffle in the screw cone ash unloader scrapes the ash into the discharge pipe. The utility model mainly improves the existing lime kiln that uses a screw cone ash unloader to unload ash, designs a lime kiln ash unloading adjustment device, and solves the problem of lime kiln deviation. Utility Model Content

[0004] Aiming at the problem of lime kiln deviation in the prior art, a lime kiln ash unloading regulating device is provided.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A lime kiln ash unloading adjustment device comprises a plurality of ash blocking rake teeth movably mounted on the outer wall of a conical shell at the bottom of a vertical lime kiln and a plurality of control mechanisms; the plurality of ash blocking rake teeth are distributed along the circumferential direction of the conical shell, and each of the ash blocking rake teeth can swing up and down relative to the conical shell; each of the ash blocking rake teeth is arc-shaped and its arc is adapted to the arc of the conical shell; the plurality of control mechanisms are installed on the outer shell of the lime kiln at intervals along the circumferential direction of the lime kiln, and each of the control mechanisms is respectively connected to the corresponding ash blocking rake teeth, and can individually control the corresponding ash blocking rake teeth to open and close.

[0007] Furthermore, each of the control mechanisms includes a connecting rod, a control rod and a pin; one end of the connecting rod is hinged to the lower end of the ash blocking rake teeth, and the other end is hinged to one end of the control rod; two fixing holes are arranged at intervals on the control rod; the other end of the control rod can movably penetrate the outer shell of the lime kiln, and the ash blocking rake teeth can be closed by locking the fixing holes close to the ash blocking rake teeth with a pin, or the ash blocking rake teeth can be opened by locking the fixing holes away from the ash blocking rake teeth with a pin.

[0008] Furthermore, a plurality of arc-shaped fixing plates are horizontally fixed on the outer wall of the conical shell along its circumferential direction; and the upper ends of the ash-blocking rake teeth are hinged to the arc-shaped fixing plates.

[0009] Furthermore, each of the ash-blocking rake teeth includes a plurality of racks and an arc-shaped connecting plate for fixing the plurality of racks at equal intervals; the upper end of each of the racks is hinged on the arc-shaped fixing plate.

[0010] Furthermore, a driving plate is fixed to the lower ends of the two racks located in the middle of each of the ash-blocking rake teeth; and the connecting rod is hinged to the driving plate.

[0011] Furthermore, the distance between the bottom of the ash-blocking rake teeth and the lowest stepped ash unloading pan of the spiral cone ash unloader is 3 to 5 centimeters.

[0012] Furthermore, the number of the ash-blocking rake teeth is 8.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] The utility model movably installs a plurality of ash-blocking rake teeth on the outer wall of the conical shell at the bottom of the vertical lime kiln and connects the ash-blocking rake teeth to a control mechanism that can independently control the opening and closing of the ash-blocking rake teeth. When the lime kiln is not deflected and operates normally, the ash-blocking rake teeth are all opened, and the lime kiln can normally unload ash through the screw cone unloader. When the kiln is deflected, for example, the temperature of the cooling layer in a certain direction or on a certain side of the lime kiln is continuously high, the ash-blocking rake teeth in that direction are closed (lowered) by the control mechanism to temporarily block the unloading of ash on that side. When the temperature is normal, the ash-blocking rake teeth are continued to be opened by the control mechanism to restore the normal unloading state. The utility model installs a lime kiln unloading adjustment device on the existing vertical lime kiln using the screw cone unloader, and can solve the deflection phenomenon by adjusting the unloading. The operation is simple and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of the lime kiln ash unloading regulating device of the utility model installed on the outer wall of the conical shell. In order to facilitate understanding and observation of the structure of the lime kiln ash unloading regulating device, Figure 1Only three ash-blocking rake teeth are drawn;

[0016] Figure 2 This is a top view of the lime kiln after the lime kiln ash unloading regulating device is installed in this embodiment;

[0017] Figure 3 It is a cross-sectional view of a screw cone ash discharger in the prior art;

[0018] Figure 4 It is a schematic diagram of the external structure of a screw cone ash unloader in the prior art;

[0019] In the attached drawings, 1, ash-blocking rake teeth; 11, rack; 12, arc-shaped connecting plate; 13, driving plate; 2, control mechanism; 21, connecting rod; 22, control rod; 23, pin; 3, arc-shaped fixing plate; 4, conical shell; 5, outer shell of lime kiln; 6, spiral cone ash unloader; 7, the lowest step ash unloading plate of spiral cone ash unloader; 8, driving mechanism of spiral cone ash unloader; DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the technical solution of the utility model patent in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0022] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] See also Figure 1-2The lime kiln ash unloading regulating device provided in this embodiment includes a plurality of ash-blocking rake teeth 1 and a plurality of control mechanisms 2 movably mounted on the outer wall of the conical shell 4 at the bottom of the vertical lime kiln; the plurality of ash-blocking rake teeth 1 are distributed along the circumferential direction of the conical shell 4, and each of the ash-blocking rake teeth 1 can swing up and down relative to the conical shell 4; each of the ash-blocking rake teeth 1 is arc-shaped and its curvature is adapted to the arc of the conical shell 4; the plurality of control mechanisms 2 are installed on the outer shell 5 of the lime kiln at intervals along the circumferential direction of the lime kiln, and each of the control mechanisms 2 is respectively connected to the corresponding ash-blocking rake teeth 1, and can individually control the corresponding ash-blocking rake teeth 1 to open and close. When a biased kiln occurs, for example, the temperature of the cooling layer in a certain direction or on a certain side of the lime kiln is continuously high, the ash-blocking rake teeth 1 in this direction on this side are closed by the control mechanism 2, and the ash unloading on this side in this direction is temporarily blocked. When the temperature is normal, the ash-blocking rake teeth 1 are continued to be opened by the control mechanism 2 to restore the normal ash unloading state.

[0024] Preferably, in this embodiment, each of the control mechanisms 2 includes a connecting rod 21, a control rod 22 and a pin 23; one end of the connecting rod 21 is hinged to the middle position of the lower end of the ash retaining rake tooth 1, and the other end is hinged to one end of the control rod 22; two fixing holes are arranged at intervals on the control rod 22; the other end of the control rod 22 can movably penetrate the outer shell 5 of the lime kiln, and the fixing hole close to the ash retaining rake tooth 1 can be locked by the pin 23 to close the ash retaining rake tooth 1, or the fixing hole away from the ash retaining rake tooth 1 can be locked by the pin 23 to open the ash retaining rake tooth 1. In this embodiment, the control mechanism 2 is installed above the driving mechanism 8 of the spiral cone ash unloader.

[0025] Preferably, a plurality of arc-shaped fixing plates 3 are horizontally fixed on the outer wall of the conical shell 4 along its circumferential direction: the upper end of the ash-blocking rake tooth 1 is hinged to the arc-shaped fixing plate 3. Each of the ash-blocking rake teeth 1 includes a plurality of racks 11 and an arc-shaped connecting plate 12 that fixes the plurality of racks 11 at equal intervals; the upper end of each of the racks 11 is hinged to the arc-shaped fixing plate 3. A driving plate 13 is fixed to the lower end of the two middle racks 11 on each of the ash-blocking rake teeth 1; the connecting rod 21 is hinged to the driving plate 13. When the connecting rod 21 is pulled by the control rod 22, the connecting rod 21 can drive the driving plate 13 to move, thereby driving the entire ash-blocking rake tooth 1 to open and close. Of course, in other embodiments, the arc-shaped fixed plate 3 can also be movably connected, such as being hinged on the outer wall of the conical shell 4, and each rack 11 is fixedly connected to the arc-shaped fixed plate 3. When the control rod 22 pulls the connecting rod 21, the connecting rod 21 can also drive the driving plate 13 to move, and can also drive the entire ash-blocking rake teeth 1 to open and close.

[0026] In this embodiment, as a preferred embodiment, the distance between the bottom of the ash blocking rake teeth 1 and the lowest step ash unloading plate 7 of the spiral cone ash unloading machine is 3 to 5 cm. This design is to prevent the ash blocking rake teeth 1 from affecting the rotation of the spiral cone ash unloading machine 6. At the same time, the gap between the ash blocking rake teeth 1 and the lowest step ash unloading plate 7 of the spiral cone ash unloading machine is small, and only a small amount of ash will flow out, which will not affect the ash unloading control of the lime kiln by the ash blocking rake teeth 1.

[0027] Preferably, the number of the dust-blocking rake teeth 1 is 8. The number of the corresponding control mechanisms 2 is also 8. The distribution of the 8 dust-blocking rake teeth 1 on the outer wall of the conical shell 4 can be seen in Figure 2 Of course, in other embodiments, the number of ash-blocking rake teeth 1 and control mechanisms 2 can be increased or decreased as needed.

[0028] It should be noted that the present invention is only to install the lime kiln ash discharge adjustment device of the present embodiment in the existing vertical lime kiln using the screw cone ash discharger 6, and the present invention does not involve the improvement of the structure of the screw cone ash discharger 6. The screw cone ash discharger 6 belongs to the prior art, and the structure and principle of the screw cone ash discharger 6 are not described in detail here. The prior art of the screw cone ash discharger 6 can be found in Figure 3 and Figure 4 , and also refer to Chinese patent application number CN201510480040.5, the invention name is "an energy-saving and environmentally friendly vertical lime kiln", which is also a vertical lime kiln using a spiral cone ash unloading machine 6, and the lime kiln ash unloading regulating device of this embodiment can also be installed in the lime kiln in the patent.

[0029] The working process and principle of this new type:

[0030] The lime kiln does not have a kiln deviation. When the lime kiln is working normally, the pins 23 in all control mechanisms 2 are locked away from the fixing holes of the ash-blocking rake teeth 1, and then all the ash-blocking rake teeth 1 are fully opened (the ash-blocking rake teeth 1 are opened as shown in FIG. Figure 3 In the case of a kiln deviation, for example, if the temperature of the cooling layer in a certain direction or on a certain side of the lime kiln is continuously high, one or two ash-blocking rake teeth 1 in that direction can be closed (lowered). Specifically, the pin 23 in the control mechanism 2 can be locked near the fixing hole of the ash-blocking rake teeth 1 to close the ash-blocking rake teeth 1 in that direction (the closed state of the ash-blocking rake teeth 1 is shown in FIG. 1 ). Figure 3 The ash blocking rake teeth 1 on the right side of the lime kiln are used to temporarily block the ash unloading on that side and in that direction. When the temperature is normal, the ash blocking rake teeth 1 are further opened through the control mechanism 2 to restore the normal ash unloading state. The utility model can solve the kiln bias phenomenon by adjusting the unloading by installing a lime kiln ash unloading regulating device on the existing vertical lime kiln using a spiral cone ash unloader 6, and has strong practicality.

[0031] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. Lime kiln ash unloading regulating device, characterized by: The invention comprises a plurality of ash-blocking rake teeth (1) movably mounted on the outer wall of a conical shell (4) at the bottom of a vertical lime kiln and a plurality of control mechanisms (2); the plurality of ash-blocking rake teeth (1) are distributed along the circumferential direction of the conical shell (4), and each of the ash-blocking rake teeth (1) can swing up and down relative to the conical shell (4); each of the ash-blocking rake teeth (1) is arc-shaped and its arc is adapted to the arc of the conical shell (4); the plurality of control mechanisms (2) are installed on the outer shell (5) of the lime kiln at intervals along the circumferential direction of the lime kiln, and each of the control mechanisms (2) is respectively connected to a corresponding ash-blocking rake tooth (1) and can independently control the corresponding ash-blocking rake tooth (1) to open and close.

2. The lime kiln ash discharge regulating device according to claim 1, characterized in that: Each of the control mechanisms (2) comprises a connecting rod (21), a control rod (22) and a pin (23); one end of the connecting rod (21) is hinged to the lower end of the ash retaining rake tooth (1), and the other end is hinged to one end of the control rod (22); two fixing holes are arranged at intervals on the control rod (22); the other end of the control rod (22) can movably penetrate the outer shell (5) of the lime kiln, and the fixing hole close to the ash retaining rake tooth (1) can be locked by the pin (23) to achieve the closure of the ash retaining rake tooth (1), or the fixing hole far from the ash retaining rake tooth (1) can be locked by the pin (23) to achieve the opening of the ash retaining rake tooth (1).

3. The lime kiln ash discharge regulating device according to claim 2, characterized in that: A plurality of arc-shaped fixing plates (3) are horizontally fixed on the outer wall of the conical shell (4) along its circumferential direction; the upper ends of the ash-blocking rake teeth (1) are hinged to the arc-shaped fixing plates (3).

4. The lime kiln ash discharge regulating device according to claim 3, characterized in that: Each of the ash-blocking rake teeth (1) comprises a plurality of racks (11) and an arc-shaped connecting plate (12) for fixing the plurality of racks (11) at equal intervals; the upper end of each of the racks (11) is hinged on the arc-shaped fixing plate (3).

5. The lime kiln ash discharge regulating device according to claim 4, characterized in that: A driving plate (13) is fixed to the lower ends of the two racks (11) located in the middle of each ash-blocking rake tooth (1); and the connecting rod (21) is hingedly connected to the driving plate (13).

6. The lime kiln ash discharge regulating device according to claim 1, characterized in that: The distance between the bottom of the ash-blocking rake teeth (1) and the lowest stepped ash-discharging tray (7) of the spiral cone ash-discharging machine is 3 to 5 centimeters.

7. The lime kiln ash discharge regulating device according to claim 1, characterized in that: The number of the ash-blocking rake teeth (1) is 8.

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