CN213416687U

CN213416687U - Shaft kiln discharging device

Info

Publication number: CN213416687U
Application number: CN202022366842.2U
Authority: CN
Inventors: 刘银江; 杭宁; 刘宇
Original assignee: NANJING SUYE CALCIUM INDUSTRY TECHNOLOGY CO LTD
Current assignee: NANJING SUYE CALCIUM INDUSTRY TECHNOLOGY CO LTD
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-06-11
Anticipated expiration: 2030-10-21

Abstract

This patent provides a shaft kiln discharge apparatus that material falling speed was unanimous basically everywhere on the shaft kiln cross-section, can make the material calcine at appropriate temperature, heat, time, guarantees the output of material, improves the product percent of pass. The device comprises a material bearing bin, an air locking discharging device, a material bearing disc positioned in the material bearing bin, a material scraper and a material scraper driving mechanism; an outlet at the lower end of the kiln body is butted with an inlet at the upper end of the material bearing bin, and an outlet at the lower end of the material bearing bin is connected with an air locking discharging device; the scraper and the material bearing disc are positioned below the outlet at the lower end of the kiln body, and the scraper driving mechanism is connected with the scraper to drive the scraper to rotate around the center of the material bearing disc; the periphery of the material bearing disc exceeds the periphery of an outlet at the lower end of the kiln body in the radial direction, and a blanking gap is formed between the periphery of the material bearing disc and the inner wall of the material bearing bin; when the scraper rotates, the material falling from the outlet at the lower end of the kiln body onto the material bearing disc is pushed into the blanking gap, so that the material falls into the lower part of the material bearing disc through the blanking gap.

Description

Shaft kiln discharging device

Technical Field

This patent relates to shaft kiln, especially the discharge apparatus of shaft kiln.

Background

The existing vertical kiln discharging device is provided with a conical body grate arranged at the lower part in a kiln body, wherein 4-6 discharging ports are formed between the grate and the inner wall of the kiln body (the discharging ports are more when the section of the kiln is larger), a vibration type discharging machine or a push-pull insert plate type discharging machine is connected below the discharging ports to discharge materials, the discharging device is a material channel with the size of the section of the kiln, and the material channel is reduced to a plurality of outlet channels with small sections through a plurality of groups of grates, for example, a kiln with the effective inner diameter of 5.00m, if the specification of 4 discharging ports is 500 x 500mm, the sectional area is reduced by about 20 times, the uniformity of the falling speed of the materials in the kiln is obviously difficult to realize, and the discharging amount of each discharging port is difficult to control uniformly, which is an important. The other discharging device is of a spiral cone type or a disc type, the discharging hole is located at the edge of the spiral cone or the disc, and generally only 1 discharging hole is provided.

The existing vertical kiln air distribution device is provided with a conical body which is arranged at the lower part in a kiln body and has a small upper part and a big lower part, wherein the conical body is a grate type conical body (generally also called an umbrella-shaped grate) which consists of a plurality of grate bars and has grate bar gaps between adjacent grate bars; the air inlet pipe communicated with the blower extends into the lower part of the blast cap positioned at the lower part in the cone body, and the air blown out from the blower is sent into the lower part of the blast cap through the air inlet pipe, flows out from the periphery of the lower part of the blast cap and then enters the kiln body outside the periphery of the cone body from the grate rod gap between the adjacent grate rods of the grate type cone body. The umbrella-shaped grate protects the blast cap from being pressed by materials, but the wind coming out of the blast cap is sent into the kiln body through the wind of the umbrella-shaped grate, so that the influence of resistance is very easy to be caused, and the wind on the same section of the kiln body is difficult to be uniformly distributed, thereby causing the wind deflection and the fire deflection. The air cap is directly arranged at the center of the lower part in the kiln body, materials are directly pressed on the air cap, the volume of the air cap is small, an air outlet is concentrated, the section of the kiln is large, and the influence of resistance change on the air quantity of the section of the kiln is very large.

Disclosure of Invention

The purpose of this patent is to provide a shaft kiln discharge apparatus that material falling speed is unanimous basically everywhere on the shaft kiln cross-section, and the falling speed of material can regulation and control, can make the material calcine at appropriate temperature, heat, time, guarantees the output of material, improves the product percent of pass.

In order to achieve the purpose, the discharging device of the vertical kiln comprises a material bearing bin, an air locking discharging device, a material bearing disc positioned in the material bearing bin, a material scraper and a material scraper driving mechanism; an outlet at the lower end of the kiln body is butted with an inlet at the upper end of the material bearing bin, and an outlet at the lower end of the material bearing bin is connected with an air locking discharging device; the scraper and the material bearing disc are positioned below the outlet at the lower end of the kiln body, and the scraper driving mechanism is connected with the scraper to drive the scraper to rotate around the center of the material bearing disc; the periphery of the material bearing disc exceeds the periphery of an outlet at the lower end of the kiln body in the radial direction, and a blanking gap is formed between the periphery of the material bearing disc and the inner wall of the material bearing bin; when the scraper rotates, the material falling from the outlet at the lower end of the kiln body onto the material bearing disc is pushed into the blanking gap, so that the material falls into the lower part of the material bearing disc through the blanking gap.

The beneficial effect of this patent: the material falls to the material bearing disc from the outlet at the lower end of the kiln body, because the periphery of the material bearing disc exceeds the periphery of the outlet at the lower end of the kiln body in the radial direction, if the material scraper does not rotate, the material on the material bearing disc also stands still. When the scraper rotates, the material on the material bearing disc is pushed into the blanking gap and falls into the lower part of the material bearing disc, and then falls onto the material bearing disc from the outlet at the lower end of the kiln body for supplement, so that the material falls into the material bearing disc from the lower end of the kiln body and the blanking gap along with the continuous rotation of the scraper. The blanking mode that the scraper rotates to push the materials to enter the blanking channel can ensure that the materials fall on the section of the vertical kiln integrally and uniformly, and ensures that the falling speeds of the materials at all positions on the section of the vertical kiln are basically consistent. The falling speed of the material can be controlled by controlling the rotating speed of the scraper, so that the material can be calcined at proper temperature, heat and time, the yield of the material is ensured, and the product percent of pass is improved.

The shaft kiln discharging device also comprises an annular rod valve, wherein the annular rod valve comprises an annular inner cylinder body, an annular outer cylinder body and a plurality of rods distributed on the periphery of the annular outer cylinder body; the upper end of the annular outer cylinder is butted with the lower end of the kiln body, and the annular inner cylinder positioned in the annular outer cylinder extends upwards to the lower part of the conical body; the annular outer cylinder body is provided with a bar material hole, and a bar material which can move along the radial direction of the annular outer cylinder body passes through the bar material hole; the lower end of the annular outer cylinder body is butted with an inlet at the upper end of the material bearing bin; the material scraping device and the material bearing disc are positioned below the annular rod valve; when each bar stock moves to one end of each bar stock to be contacted with the annular inner cylinder body along the radial direction, the annular rod valve stops the material from falling onto the material bearing disc from the outlet at the lower end of the kiln body through the annular rod valve.

In order to facilitate the maintenance or replacement of the material bearing disc, the material scraping device driving mechanism and the like, the annular rod valve is arranged. Specifically, when the bars move to the contact between the bars and the annular inner cylinder body along the radial direction, each bar basically blocks the space between the annular outer cylinder body and the annular inner cylinder body, at the moment, the materials falling from the outlet at the lower end of the kiln body enter the space between the annular outer cylinder body and the annular inner cylinder body, the materials cannot continuously fall due to the blocking of the bars, no new materials can enter the material bearing plate and the material bearing bin at the lower part of the annular rod valve, and at the moment, the material bearing plate, the material bearing bin, the material scraper driving mechanism and the like can be overhauled or replaced without emptying the materials of the vertical kiln, and even the material bearing plate, the material bearing bin, the material scraper driving mechanism and the like can be overhauled or replaced when the materials in the vertical kiln are produced. Of course, when in normal production, the bar material can not extend into the space between the annular outer cylinder and the annular inner cylinder, or the bar material can be drawn out from the bar material hole on the annular outer cylinder (the bar material hole is sealed by an additionally configured plug to prevent the wind in the kiln from leaking), the annular bar valve is in an open state, and the material can not be influenced to fall onto the material bearing disc from the lower end of the kiln body through the space between the annular outer cylinder and the annular inner cylinder.

The vertical kiln discharging device has the advantages that the center of the material bearing disc is high, and the periphery of the material bearing disc is low. The material bearing disc has high center and low periphery, so that the material can be pushed into the blanking gap by the scraper more easily.

The material scraping device of the vertical kiln discharging device is arc-shaped, and when the material scraping device rotates, the material on the material bearing disc is pushed from the center of the material bearing disc to the edge of the material bearing disc. The friction force between the arc-shaped material scraping device and the materials is smaller, the material scraping device rotates at a constant speed simultaneously, the materials can uniformly fall into a blanking gap, and the materials are further guaranteed to uniformly fall on the whole section of the vertical kiln. The rotating speed of the scraper can be controlled by a transmission mechanism, and the higher the speed is, the larger the discharge amount is.

The air-locking discharging device of the vertical kiln is a star-shaped impeller type discharging machine (valve) or a two-stage or multi-stage air-locking discharging gate, and further comprises a dust remover, wherein an air guide hole is formed in the air-locking discharging device, is communicated with a cavity in the air-locking discharging device before the material reaches a discharging opening of the air-locking discharging device, and is communicated with an air inlet port of the dust remover through an air guide pipe.

The shaft kiln discharging device further comprises an air distribution device, air outlet holes of the air distribution device are located on the circumferences with different diameters and taking the shaft axis of the kiln body as the axis, the heights of the circumferences with different diameters in the shaft axis direction of the kiln body are different, and the heights of the air outlet holes located on the circumferences with smaller diameters in the shaft axis direction of the kiln body are higher.

The wind distribution device can be said to be a tower-shaped annular wind distribution structure. Because the geometric void ratio in the kiln is higher, in order to ensure that air is distributed as uniformly as possible at each position on the section of the shaft kiln, the structure that the height of the air outlet on the circumference with the smaller diameter is higher in the axial direction of the kiln body and the height of the air outlet on the circumference with the larger diameter is lower in the axial direction of the kiln body is adopted. The structure is also beneficial to smooth descending of the materials, the materials are uniformly calcined, and the product percent of pass is high.

In the shaft kiln discharging device, the air distribution device comprises a plurality of annular air distribution pipelines which are symmetrically arranged at the lower part in the kiln body, the diameters of the annular air distribution pipelines are different, the annular air distribution pipelines are distributed up and down by taking the shaft line of the kiln body as the shaft line, and the air distribution pipelines with larger diameters have higher heights in the shaft line direction of the kiln body; the air distribution duct is provided with air outlet holes which are symmetrically distributed and communicated with the interior of the kiln body, and the air distribution duct is communicated with the blower through an air inlet pipe. The air distribution pipelines arranged up and down do not influence the passing of materials. The air inlet pipe is provided with a gas flow pressure detecting instrument and an air door capable of adjusting the gas flow.

The shaft kiln discharging device is provided with a conical body which is arranged at the lower part in the kiln body and is small at the top and big at the bottom, a material descending channel is formed between the periphery of the conical body and the inner wall of the lower end of the kiln body, and the conical body is a closed cavity body or a grate type conical body which consists of a plurality of grate bars and has a grate bar clearance between the adjacent grate bars;

when the conical body is a closed cavity body, the closed cavity body is provided with an air inlet hole communicated with the air blower through an air inlet pipe, the closed cavity body is provided with a plurality of air outlet holes communicated with the interior of the kiln body, and the air distribution device comprises a closed cavity body;

when the cone is a grate type cone, the air distribution pipe is communicated with the blower through the air inlet pipe, a plurality of air outlet holes communicated with the interior of the kiln body outside the periphery of the cone are formed in the air distribution pipe in the kiln body, and the air distribution device comprises the air distribution pipe;

the air outlet holes are symmetrically distributed on a projection view of the kiln body inner cavity vertical to the kiln body axis by taking the kiln body axis as the center.

When the cone body in the patent adopts a grate type cone body, the air distribution pipe is provided with a plurality of air outlet holes which are communicated with the interior of the kiln body outside the periphery of the cone body; thus, air entering the vertical kiln from the blower through the air inlet pipe and the air distribution pipe enters the interior of the vertical kiln, rather than entering the interior of the vertical kiln through the gaps between the grate bars from the lower part in the conical body as in the prior art. And the air outlets on the air distribution pipes are symmetrically distributed on a projection view of the inner cavity of the kiln body vertical to the axis of the kiln body, so that the air quantity in the vertical kiln is basically uniform at all positions on the section of the vertical kiln, the uniform calcination of materials is ensured, and the product percent of pass is improved.

When the conical body in the patent adopts a closed cavity body, a material descending channel is formed between the periphery of the conical body and the inner wall of the lower end of the kiln body, the outflow of the material cannot be influenced, meanwhile, an air inlet hole communicated with an air blower through an air inlet pipe is formed in the closed cavity body, and an air outlet hole communicated with the inside of the kiln body is formed in the closed cavity body; and the air outlet holes on the closed cavity body are symmetrically distributed on a projection view of the inner cavity of the kiln body vertical to the axis of the kiln body, so that the air quantity in the shaft kiln is basically uniform and consistent at all positions on the section of the shaft kiln, the uniform and consistent calcination of materials is ensured, and the product percent of pass is improved. The air outlet holes on the closed cavity body are communicated with an air distribution pipe arranged in the kiln body, the air distribution pipe is provided with a plurality of air outlet holes which are uniformly distributed, and the air distribution pipe is symmetrically distributed along the axial line of the kiln body; the air outlet holes on the air distribution pipe are also symmetrically distributed on a projection view of the kiln body inner cavity vertical to the kiln body axis by taking the kiln body axis as the center. The closed cavity body plays a role in supporting and fixing the air distribution pipe and a role in serving as an air buffer air storage tank.

In the vertical kiln discharging device, the air inlet pipe is provided with the gas flow pressure detection instrument and the air door capable of adjusting the gas flow.

The vertical kiln discharging device is characterized in that a vertical annular air pipe is arranged outside the periphery of the kiln body, an air inlet and a plurality of air outlets are formed in the annular air pipe, the air inlet is communicated with the blower, the air outlets are connected with branch air pipes extending into the kiln body, and the branch air pipes are communicated with the air distribution device in the kiln body. Of course, this configuration is typically employed when the kiln body is of a larger diameter. And a branch air pipe extending into the kiln body is provided with a pressure detector, a flow detector, a regulating damper and the like.

In a word, the application is a shaft kiln discharging device which has the advantages that the air quantity in the shaft kiln is basically uniform and consistent at all positions on the section of the shaft kiln, the material calcination is uniform and consistent, and the product qualification rate is high.

Drawings

FIG. 1 is a front view of a shaft kiln air distribution discharge apparatus according to embodiment 1.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a left side view of fig. 1.

Fig. 4 is a schematic view of the cone, the air distribution device, the material receiving bin, the air locking discharging device, the material conveying equipment and the like in fig. 1.

Fig. 5 is a schematic view of the cone, the material receiving bin, the air locking discharging device, the material conveying equipment and the like in fig. 1.

Fig. 6 is a schematic view of the material receiving bin, the air locking discharging device and the like in fig. 3.

Fig. 7 is a schematic view of the wind distribution device and the like in fig. 1.

Fig. 8 is a bottom view of the upper air distribution pipe, the middle air distribution pipe, the lower air distribution pipe, and the like in fig. 7.

FIG. 9 is a schematic view of a ring-shaped rod valve, scraper, etc.

Fig. 10 is a top view of fig. 8.

Fig. 11 is a schematic view of a grate cone in example 1.

Fig. 12 is a top view of fig. 11.

Fig. 13 is a schematic view of a ring-shaped rod valve or the like.

Fig. 14 is a top view of fig. 13.

Fig. 15 is a front view of the airlock discharge device.

Fig. 16 is a side view of the airlock discharge device.

Fig. 17 is a schematic view of a sealed cavity in example 2.

Fig. 18 is a bottom view of the lower outlet duct of fig. 15. Fig. 19 is a bottom view of the middle air outlet pipe in fig. 15.

Fig. 20 is a bottom view of the upper outlet duct of fig. 15.

In the figure, a kiln body 1, a lower end 11 of the kiln body,

the cone body 2, the grate bars 21, the grate bar gaps 22, the supporting legs 23, the upper air outlet pipe 24, the middle air outlet pipe 25, the lower air outlet pipe 26, the closed cavity body 27, the air inlet hole 28,

an air distribution device 3, an upper air distribution pipe 31, a middle air distribution pipe 32, a lower air distribution pipe 33, an upper air outlet hole 34, a middle air outlet hole 35, a lower air outlet hole 36, an air inlet pipe 37, a gas flowmeter 371, an air door 372,

an annular rod valve 4, an annular inner cylinder 41, an annular outer cylinder 42, a bar 43, a bar hole 44, a support ring 45,

the device comprises a material bearing bin 5, an air locking discharging device 6, a shell 61, a rotating shaft 62, blades 63, a cavity 64, a material inlet 65, a material outlet 66, an air duct 67, a material bearing tray 7, a material scraper 8, a material scraper driving mechanism 9 and a rotating shaft 91,

the material conveying device 10 is provided with a material conveying device,

a material descending channel 102, a valve 506 and a blanking gap 507.

Detailed Description

Example 1 (shaft kiln air distribution discharge device with grate cone):

referring to fig. 1-4, the air distribution discharging device of the shaft kiln comprises a conical body 2 which is arranged at the lower part of the shaft kiln body 1 and has a small upper part and a big lower part, an air distribution device 3, an annular rod valve 4 and a discharging device. The discharging device comprises a material bearing bin 5, an air locking discharging device 6, a material bearing tray 7 positioned in the material bearing bin, a material scraper 8 and a material scraper driving mechanism 9.

Referring to fig. 5, 11 and 12, the cone 2 is supported inside the lower end of the kiln body by support legs 23, and is a grate type cone composed of a plurality of grate bars 21 and having grate bar gaps 22 between adjacent grate bars; a material descending channel 102 is formed between the periphery of the conical body 2 and the inner wall of the lower end 11 of the kiln body.

Referring to fig. 7 and 8, the air distribution device 3 includes an upper air distribution pipe 31, a middle air distribution pipe 32 and a lower air distribution pipe 33 which are different in height on the axis of the kiln body, the upper air distribution pipe 31, the middle air distribution pipe 32 and the lower air distribution pipe 33 are all communicated with the blower outside the kiln body through an air inlet pipe 37, and the air inlet pipe 37 is provided with a gas flow meter 371, a pressure gauge and an air door 372 which can adjust the gas flow.

The upper air distributing pipe 31, the middle air distributing pipe 32 and the lower air distributing pipe 33 are respectively provided with an upper air outlet hole 34, a middle air outlet hole 35 and a lower air outlet hole 36, and the upper air outlet hole 34, the middle air outlet hole 35 and the lower air outlet hole 36 are communicated with the inside of the kiln body outside the periphery of the conical body 2. The upper air outlet hole 34, the middle air outlet hole 35 and the lower air outlet hole 36 are respectively positioned on three different circumferences with the axis of the kiln body as the axis, the heights of the different circumferences in the axis direction of the kiln body are different, the upper air outlet hole 34 positioned on the circumference with the smallest diameter is highest in the axis direction of the kiln body, and the upper air outlet hole, the middle air outlet hole and the lower air outlet hole are uniformly distributed on the circumference with the smallest diameter; the lower air outlet holes 36 on the circumference with the largest diameter are the lowest in the axial direction of the kiln body and are evenly distributed on the circumference with the largest diameter.

The air outlet holes (including the upper air outlet hole 34, the middle air outlet hole 35 and the lower air outlet hole 36) are equal in size and are basically and uniformly distributed on a projection view of the kiln body inner cavity perpendicular to the kiln body axis, that is, on the projection view of the kiln body inner cavity perpendicular to the kiln body axis, the distance between any two adjacent air outlet holes is basically equal or the projection areas governed by any adjacent air outlet holes are basically equal.

Referring to fig. 13 and 14, the annular rod valve 4 comprises an annular inner cylinder 41, an annular outer cylinder 42 and a plurality of steel bars 43 distributed on the circumference of the annular outer cylinder; the upper end of the annular outer cylinder 42 is butted with the lower end 11 of the kiln body, and the annular inner cylinder 41 positioned in the annular outer cylinder 42 extends upwards to the lower part of the conical body 2; a bar material hole 44 is formed on the annular outer cylinder body, and a bar material 43 which can move along the radial direction of the annular outer cylinder body passes through the bar material hole; a support ring 45 is fixed to the outer wall of the annular inner cylinder 41. When the bar 43 extends into the outer wall of the annular inner cylinder 41 along the radial direction of the kiln body, the inner end of the bar 43 can be supported on the support ring 45. The lower end of the annular outer cylinder 42 is butted with an inlet at the upper end of the material bearing bin 5; the scraper 8 and the material bearing disc 7 are positioned below the annular rod valve.

An outlet at the lower end of the material bearing bin 5 is connected with an air locking discharging device 6 through a valve 506; the air locking discharging device 6 belongs to the prior art, can be in a star-shaped impeller type, can also be in a double-gate or three-gate type, is not described in detail, has the function of preventing air in the kiln from leaking and discharging, but is not ideal in air locking effect. And a material conveying device 10 is arranged at the outlet of the lower end of the air locking discharging device 6.

The air locking discharging device of the invention is further improved, referring to fig. 15 and 16, the air locking discharging device 6 comprises a cylindrical shell 61, a rotating shaft 62 passes through the center of the shell 61 and is rotatably arranged on the shell 61, one end of the rotating shaft 61 is connected with a rotating transmission mechanism for driving the rotating shaft to rotate, a plurality of blades 63 are connected on the circumference of the rotating shaft to form an impeller, and the blades divide a cavity 64 in the shell 61 into a plurality of chambers. The upper left end of the shell is provided with a feed inlet 65 communicated with the cavity, the feed inlet 65 is in butt joint with the valve 506, the lower end of the shell is provided with a discharge port 66 communicated with the cavity, and the discharge port 66 is positioned above the material conveying equipment 10. The inlet opening 65 is separated from the discharge opening 66 by at least one chamber, and a gas duct 67 connects at least one chamber separating the inlet opening 65 from the discharge opening 66 with an inlet port of a dust separator (not shown).

The inlet opening 65 is not in direct communication with the discharge opening 66, but is separated by at least one chamber, regardless of the position to which the impeller is rotated. After entering a chamber from the inlet 65, the material gradually moves towards the discharge 66 as the impeller rotates, and before moving to the discharge 66, it passes through at least one chamber in which gas is introduced into the precipitator via the gas duct 67 for dust removal. Thus, the air in the air-locking discharging device is led to the dust remover and is not discharged from the discharging opening any more.

Referring to fig. 9 and 10, a scraper driving mechanism (e.g. a motor) 9 located below the material-holding tray 7 with high center and low periphery in the material-holding bin 5 is connected with one end of two symmetrical arc scrapers 8 close to the axis of the kiln body through a rotating shaft 91 penetrating through the center of the material-holding tray; the periphery of the material bearing disc 7 exceeds the annular outer cylinder 42 in the radial direction, and a blanking gap 507 is arranged between the periphery of the material bearing disc 7 and the inner wall of the material bearing bin 5.

When the shaft kiln is normally produced, the material enters between the annular inner cylinder 41 and the annular outer cylinder 42 from the material descending channel 102 and then falls onto the material bearing disc 7. When the scraper 8 rotates around the axis of the kiln body under the driving of the scraper driving mechanism 9, the scraper 8 pushes the material to push from the center of the material bearing tray 7 to the edge of the material bearing tray, the material is pushed into the blanking gap 507, the material falls into the lower part of the material bearing bin 5 through the blanking gap 507, and finally the material falls onto the material conveying equipment 10 through the valve 506 and the air locking discharging device 6, so that the material conveying is realized.

When the material bearing disc 7, the material scraper 8 or the material scraper driving mechanism 9 needs to be overhauled, the bars 43 are pushed to move along the radial direction until the inner ends of the bars, which are close to the axis of the kiln body, are contacted with the annular inner cylinder 41, the end parts of the bars 43, which are close to the axis of the kiln body, are supported on the supporting ring 45, and the bars 43 block the falling of the materials, namely the materials cannot fall onto the material bearing disc 7 from the material descending channel 102 through the annular rod valve 4.

Example 2 (shaft kiln air distribution discharge device with closed cavity):

referring to fig. 17-20, the shaft kiln air distribution discharging device of the embodiment 2 mainly differs from the embodiment 1 in that: the conical body 2 and the air distribution device 3 in embodiment 2 are different from those in embodiment 1. The cone 2 in the embodiment 2 is a closed cavity 27, and the cone 2 in the embodiment 1 is a grate type cone composed of a plurality of grate bars 21 and grate bar gaps 22 between adjacent grate bars. For the embodiment 2, the upper air outlet 34, the middle air outlet 35 and the lower air outlet 36 of the air distribution device 3 are arranged on the sealed cavity 27, the air inlet 28 on the sealed cavity 27 is communicated with the blower through the air inlet pipe 37, and the sealed cavity 27 as a cone can be regarded as a component of the air distribution device, which can play a role in stabilizing the pressure and the flow of the air flow; for embodiment 1, the upper air outlet 34, the middle air outlet 35, and the lower air outlet 36 are respectively disposed on the upper air distribution pipe 31, the middle air distribution pipe 32, and the lower air distribution pipe 33, and the upper air distribution pipe 31, the middle air distribution pipe 32, and the lower air distribution pipe 33 are respectively communicated with the blower through the air inlet pipe 37.

Of course, for the embodiment 2, the upper air outlet 34, the middle air outlet 35, and the lower air outlet 36 may also be respectively disposed on the upper air outlet pipe 24, the middle air outlet pipe 25, and the lower air outlet pipe 26 communicated with the sealed hollow cavity 27. The structure is substantially the same as the structure that the upper air outlet 34, the middle air outlet 35 and the lower air outlet 36 are directly arranged on the closed cavity body 27, but the structure can meet the requirement of a kiln type with larger diameter.

In this patent, the cone 2 can be a grate (as in example 1) or a closed cavity (as in example 2), and the cone plays a role in relatively uniformly discharging the materials in the kiln.

The air distributing pipe or the air outlet pipe can extend along the radial direction of the kiln body or extend along the axial direction of the kiln body.

The air inlet pipe is composed of 1 or a plurality of air inlet pipes, a gas flowmeter and a pressure gauge are arranged on the air inlet pipe to display the air flow and the pressure of the air inlet pipe, and an air door is arranged on the air inlet pipe to adjust the flow.

The vertical central line of the conical body is coincided with the central line of the kiln body, a material descending channel is formed between the conical body and the inner wall of the kiln body, and the outlet of the material descending channel (namely the outlet at the lower end of the kiln body) is hermetically connected with the upper end of the annular rod valve.

The discharging device comprises a material bearing disc, a material scraping device driving mechanism, a material bearing bin and the like, wherein the upper opening of the material bearing bin is hermetically connected with the lower end of an annular rod valve outside the kiln body, and the lower opening of the material bearing bin is connected with the air locking discharging device. When the material is discharged from the kiln, the material falls into the material receiving bin through the annular rod valve and the material receiving disc.

The material bearing disc is positioned below the conical body and the annular rod valve and fixed in the material bearing bin, the outer diameter of the material bearing disc is larger than the diameter of the annular outer barrel of the annular rod valve, and a blanking gap is formed between the periphery of the material bearing disc and the inner wall of the material bearing bin. When the material descends from the kiln, the material falls onto the material bearing disc through the rod valve.

The material scraping device is installed on the material bearing disc, the material on the material bearing disc is scraped out along the circumferential direction when the material scraping device rotates, and falls into the closed material bearing bin through the blanking gap, and the falling speed of the material in the vertical kiln is more uniform at the same section by the circumferential material scraping and discharging mode.

The scraper is driven by the scraper driving mechanism to rotate, and the rotating speed can be adjusted.

The material level instrument reflecting the material level height is arranged in the material bearing bin, the lower end outlet of the material bearing bin is connected with the air locking discharging device, the machine body of the air locking discharging device is provided with an air guide hole, one end of the air guide hole is communicated with the cavity of the air locking discharging device, and the other end of the air guide hole is connected with the air inlet of the dust remover through a pipeline, so that air locking discharging is really realized.

The air distribution device with the structure can adjust and control the distribution condition of air entering the vertical kiln, so that the air is distributed more uniformly at the cross section of the vertical kiln, and the phenomenon of wind deflection in the kiln is avoided. The air distribution device with the structure can also adjust and control the flow of air entering the shaft kiln and control the calcining speed.

The discharging device with the structure can enable the discharging and falling of materials in the kiln to be more uniform, avoid the phenomenon of material deviation in the kiln and realize air locking, continuous blast and continuous discharging.

The air distribution discharging device with the structure can stabilize a thermal regulation system in the vertical kiln, stabilize a calcining position, produce higher-quality lime when used as the vertical kiln for producing lime, better control the raw burning rate and the overburning rate, avoid nodulation, better control and stabilize the discharging temperature of materials and the discharged smoke, and save more energy.

Claims

1. The shaft kiln discharge apparatus is characterized in that: the discharging device comprises a material bearing bin, an air locking discharging device, a material bearing disc positioned in the material bearing bin, a material scraper and a material scraper driving mechanism; an outlet at the lower end of the kiln body is butted with an inlet at the upper end of the material bearing bin, and an outlet at the lower end of the material bearing bin is connected with an air locking discharging device; the scraper and the material bearing disc are positioned below the outlet at the lower end of the kiln body, and the scraper driving mechanism is connected with the scraper to drive the scraper to rotate around the center of the material bearing disc; the periphery of the material bearing disc exceeds the periphery of an outlet at the lower end of the kiln body in the radial direction, and a blanking gap is formed between the periphery of the material bearing disc and the inner wall of the material bearing bin; when the scraper rotates, the material falling from the outlet at the lower end of the kiln body onto the material bearing disc is pushed into the blanking gap, so that the material falls into the lower part of the material bearing disc through the blanking gap.

2. The shaft kiln discharge apparatus as defined in claim 1, wherein: the annular rod valve comprises an annular inner cylinder body, an annular outer cylinder body and a plurality of rods distributed on the periphery of the annular outer cylinder body; the upper end of the annular outer cylinder is butted with the lower end of the kiln body, and the annular inner cylinder positioned in the annular outer cylinder extends upwards to the lower part of the conical body; the annular outer cylinder body is provided with a bar material hole, and a bar material which can move along the radial direction of the annular outer cylinder body passes through the bar material hole; the lower end of the annular outer cylinder body is butted with an inlet at the upper end of the material bearing bin; the material scraping device and the material bearing disc are positioned below the annular rod valve; when each bar stock moves to one end of each bar stock to be contacted with the annular inner cylinder body along the radial direction, the annular rod valve stops the material from falling onto the material bearing disc from the outlet at the lower end of the kiln body through the annular rod valve.

3. The shaft kiln discharge apparatus as defined in claim 1, wherein: the center of the material bearing disc is high and the periphery is low.

4. The shaft kiln discharge apparatus as defined in claim 1, wherein: the scraper is arc-shaped, and when the scraper rotates, the material on the material bearing disc is pushed from the center of the material bearing disc to the edge of the material bearing disc.

5. The shaft kiln discharge apparatus as defined in claim 1, wherein: the air-locking discharging device is provided with an air guide hole, and the air guide hole is communicated with a cavity in the air-locking discharging device before the material reaches a discharging opening of the air-locking discharging device and is communicated with an air inlet port of the dust remover through an air guide pipe.

6. The shaft kiln discharge apparatus as defined in claim 1, wherein: the kiln also comprises an air distribution device, wherein air outlet holes of the air distribution device are positioned on the circumferences with different diameters and taking the axis of the kiln body as the axis, the heights of the circumferences with different diameters in the axis direction of the kiln body are different, and the heights of the air outlet holes positioned on the circumferences with smaller diameters in the axis direction of the kiln body are higher.

7. The shaft kiln discharge apparatus as defined in claim 6, wherein: the air distribution device comprises a plurality of annular air distribution pipelines which are symmetrically arranged at the lower part in the kiln body, the diameters of the annular air distribution pipelines are different, the annular air distribution pipelines are distributed up and down by taking the axis of the kiln body as the axis, and the air distribution pipelines with larger diameters are higher in height in the axis direction of the kiln body; the air distribution duct is provided with air outlet holes which are symmetrically distributed and communicated with the interior of the kiln body, and the air distribution duct is communicated with the blower through an air inlet pipe.

8. The shaft kiln discharge apparatus as defined in claim 6, wherein: the kiln comprises a conical body which is arranged at the lower part in the kiln body and is small at the top and big at the bottom, a material descending channel is formed between the periphery of the conical body and the inner wall of the lower end of the kiln body, and the conical body is a closed cavity body or a grate type conical body which consists of a plurality of grate bars and has a grate bar clearance between the adjacent grate bars;

the air outlet holes are symmetrically distributed on a projection view of the kiln body inner cavity vertical to the kiln body axis.

9. The shaft kiln discharge apparatus as defined in claim 7 or 8, wherein: the air inlet pipe is provided with a gas flow pressure detecting instrument and an air door capable of adjusting the gas flow.

10. The shaft kiln discharge apparatus as defined in claim 6, wherein: an annular air pipe is arranged outside the periphery of the kiln body, an air inlet and a plurality of air outlets are arranged on the annular air pipe, the air inlet is communicated with the blower, the air outlets are connected with branch air pipes extending into the kiln body, and the branch air pipes are communicated with an air distribution device in the kiln body.