CN201165494Y - Vertical Continuous Lime Calcination Kiln - Google Patents

Abstract

The utility model discloses a vertical continuous calcining lime kiln, which comprises a cylindrical kiln body. The kiln body is sequentially provided with an air-closing feeding device at the top of the kiln body, a The distributing device on the upper part of the inner cavity, the preheating area located under the distributing device, the calcining area located below the preheating area, the cooling area located below the calcining area, the outlet located below the cooling area A continuous discharge device, the top of the kiln body is provided with a kiln gas discharge pipe, and the inner space of the kiln body is provided with a hot air outlet channel arranged along the axial direction of the kiln body and extending to the preheating zone, The cylinder wall of the hot air outlet channel is provided with several air inlets and outlets; the utility model can be continuously produced, and can control the lime to fall at a constant speed in the kiln without sintering phenomenon, and can control the lime to fall at a constant speed on each horizontal surface in the kiln. , Completely put an end to the phenomenon of raw burning and over burning.

Description

Vertical continuous calcined lime kiln

technical field

The utility model relates to a calcined lime kiln.

Background technique

Under the general trend of all walks of life requiring energy saving, emission reduction and environmental protection, the current lime kilns (including bedrock coal, flint mixed firing, rotary kiln and imported kiln types) all have defects to varying degrees. For example, the coal-stone mixed firing kiln cannot guarantee that there will be no over-burning and raw-burning, the authenticity rate is very low, and the energy consumption is not environmentally friendly, which has been banned by local governments; the investment in imported kilns is too large, and there are also unreasonable calcination processes. places, higher energy consumption.

Utility model content

The technical problem to be solved by the utility model is to provide a vertical continuous calcining lime kiln with reasonable calcining process and continuous calcining.

In order to solve the above technical problems, the technical solution of the utility model is: a vertical continuous calcining lime kiln, comprising a cylindrical kiln body, and the kiln body is sequentially provided with a closed air inlet located at the top of the kiln body. material device, a material distribution device located at the upper part of the kiln cavity, a preheating area located below the material distribution device, a calcination area located below the preheating area, a cooling area located below the calcination area, and a The continuous discharge device below the discharge port of the kiln body, the top of the kiln body is provided with a kiln gas discharge pipe, and the inner space of the kiln body is provided along the axial direction of the kiln body and extends to the preheating The hot air outlet channel in the zone, the cylinder wall of the hot air outlet channel is provided with a number of air inlet and outlet ports.

As an improvement, the air-closed feeding device includes a feeding hopper, at least three rotating feeding doors uniformly distributed in the circumferential direction at the lower part of the feeding hopper, the axis of the rotating feeding door is horizontal, and the rotating The material outlet at the lower part of the material inlet door.

As an improvement, the distributing device is a cone with a small top and a large bottom, and the cone is coaxial with the kiln body.

As an improvement, the calcination area includes an annular combustion chamber installed along the outer peripheral surface of the kiln body, and the kiln body is provided with a flame nozzle corresponding to the calcination area.

As a further improvement to the above technical solution, an annular protrusion is provided on the inner wall of the kiln above the burner port.

As an improvement, the lower part of the cooling zone is provided with a funnel-shaped outlet.

As an improvement, the continuous discharge device includes a fixedly installed ash receiving tray located below the outlet of the cooling zone, and a reciprocating ash pushing plate is provided on the ash receiving tray, and the ash pushing plate passes through The push arm power is connected to the reciprocating drive device.

As a further improvement to the above technical solution, the reciprocating drive device includes an electric motor, a gearbox power-connected to the electric motor, and a balance wheel hinged to the push arm is installed at the power output end of the gearbox.

As a further improvement to the above technical solution, the motor is a variable frequency motor.

As an improvement, a hopper is provided under the continuous discharge device, and a belt conveyor is provided at the discharge port of the hopper.

Due to the adoption of the above-mentioned technical scheme, the vertical continuous calcining lime kiln includes a cylindrical kiln body, and the kiln body is sequentially provided with an air-closed feeding device located at the top of the kiln body, and located at the kiln body. The distributing device on the upper part of the inner cavity, the preheating zone located below the distributing device, the calcining zone below the preheating zone, the cooling zone below the calcining zone, the cooling zone below the outlet of the cooling zone A continuous discharge device, the top of the kiln body is provided with a kiln gas discharge pipe, and the inner space of the kiln body is provided with a hot air outlet channel arranged along the axial direction of the kiln body and extending to the preheating zone, There are several air inlets and outlets on the wall of the hot air outlet channel; the calcination process of the whole kiln is very reasonable, and the energy consumption is extremely low. Smoke emission, the kiln tail gas is treated with dust removal and desulfurization device, which can fully meet the standard discharge. The activity of the produced lime is above 350lm, and there is no phenomenon of over-burning or raw burning; the utility model can be continuously produced and can control the uniform velocity in the lime kiln. Falling, no sintering phenomenon, can control the lime to fall at a constant speed on each horizontal surface in the kiln, completely eliminate the phenomenon of raw burning and over-burning, the speed of falling is realized by the continuous discharge device; the utility model saves coal compared with other kilns About 8%, saving 80% of electricity compared with rotary kiln, occupying an area of 80% of that of rotary kiln, increasing the activity of lime by 150lm, project cost is 60% of rotary kiln, project cost is 35% of imported kiln, construction period shortened by more than half.

Description of drawings

Accompanying drawing is the structural representation of the utility model embodiment.

Detailed ways

As shown in the drawings, the vertical continuous calcining lime kiln includes a cylindrical kiln body 1, the inner cavity of the kiln body 1 is provided with a refractory kiln lining, and the kiln body 1 is sequentially provided with the The closed-air feeding device 2 on the top of the kiln body 1, the material distribution device 3 located on the upper part of the inner cavity of the kiln body 1, the preheating area 4 located below the material distribution device 3, and the calcining area located below the preheating area 4 5. The cooling zone 6 located below the calcining zone 5, the continuous discharge device 7 located below the discharge port 61 of the cooling zone 6, the top of the kiln body 1 is provided with a kiln gas discharge pipe 10, the The inner space of the kiln body 1 is provided with a hot air outlet passage 9 arranged axially along the kiln body 1 and extending to the preheating zone 4. The hot air outlet passage 9 is made of high temperature resistant material. The hot air outlet channel 9 divides the limestone in the kiln body into a cylindrical shape to ensure that the limestone is burned thoroughly and evenly in the calcination zone 5. A number of air inlets and outlets 91 are provided on the wall of the hot air outlet channel 9 to allow the calcination flame to penetrate The limestone layer is used to avoid leakage, and at the same time, the excess heat is transferred to the upper part of the kiln through the channel to preheat the limestone raw material to save energy.

The air-closed feeding device 2 includes a feeding hopper 21, at least three rotating feeding doors 22 uniformly distributed in the circumferential direction at the lower part of the feeding hopper 21, the axis of the rotating feeding door 22 is horizontal, and is located in the rotating The discharge port 23 of the feed door 22 bottoms, this device is similar to the revolving door of hotels and restaurants, which can prevent the gas from overflowing in the kiln.

The material distributing device 3 is a conical body with a small top and a large bottom, and the conical body is coaxial with the kiln body 1, so that when the material falls, the material is evenly distributed within the ring-shaped range by the cone to avoid deviation in the furnace. Burning happens.

The calcining zone 5 includes an annular combustion chamber 51 installed along the outer circumferential surface of the kiln body 1. There may be one or more annular combustion chambers 51, which are set according to actual conditions. In this embodiment, two , the kiln body 1 is provided with a flame spout 52 corresponding to the calcining zone 5, sprayed and fired with ultra-fine coal powder, the calcining process of the whole kiln is very reasonable, and the energy consumption is extremely low, and the coal used for each ton of lime is no more than 100kg ( 6000 cal/kg industrial coal) has absolutely no black smoke emission, and the kiln tail gas is treated with a dust removal and desulfurization device, which can fully meet the emission standards. The inner wall of the kiln body 1 and above the burner port 52 are provided with an annular protrusion 53, which can form a calcining flame belt under the annular protrusion 53 in the kiln to ensure uniform calcination of the limestone.

The lower part of the cooling zone 6 is provided with a funnel-shaped outlet 6, which can control the falling speed of the limestone.

The continuous discharge device 7 includes a fixedly installed ash tray 71 located below the outlet 61 of the cooling zone. The ash tray utilizes the accumulation of lime to block the funnel-shaped outlet 6 at the bottom of the cooling zone 6 , the ash plate 71 is provided with a reciprocating ash plate 72, once the ash plate 72 is pushed, the lime will fall once, and the reciprocating movement will realize the continuous discharge of the lime. The gray pushing board 72 is connected to the reciprocating drive device through the pushing arm 73 power. The reciprocating drive device includes an electric motor 74 , a gearbox 75 power-connected with the electric motor 74 , and a balance wheel 76 hinged with the push arm 73 is installed at the power output end of the gearbox 75 . The motor 74 is a variable frequency motor, which can control the speed of discharging, thereby controlling the speed and quality of calcination.

A receiving hopper 81 is provided below the continuous discharge device 7, and a belt conveyor 8 is provided at the outlet of the receiving hopper 81 to transport the finished lime products to distant places.

Claims (10)

1. A vertical continuous calcining lime kiln, comprising a cylindrical kiln body (1), characterized in that: the kiln body (1) is sequentially provided with closed air at the top of the kiln body (1) from top to bottom The feeding device (2), the distributing device (3) located on the upper part of the inner cavity of the kiln body (1), the preheating zone (4) located below the distributing device (3), the preheating zone (4) ), the calcination zone (5) below the calcination zone (5), the cooling zone (6) below the calcination zone (5), the continuous discharge device (7) below the outlet ( 61 ) of the cooling zone ( 6 ), The top of the kiln body (1) is provided with a kiln gas discharge pipe (10), and the inner space of the kiln body (1) is provided with a pipe arranged along the axial direction of the kiln body (1) and extending to the preheating The hot air outlet channel (9) of the zone (4), the cylinder wall of the hot air outlet channel (9) is provided with several air inlet and outlet ports (91). 2. The vertical continuous calcining lime kiln according to claim 1, characterized in that: the closed air feeding device (2) comprises a feed hopper (21), at least Three revolving feed gates (22) uniformly distributed in the circumferential direction, the axes of the revolving feed gates (22) are horizontal and located at the discharge port (23) at the lower part of the revolving feed gates (22). 3. The vertical continuous calcining lime kiln according to claim 1, characterized in that: the distribution device (3) is a conical body with a small top and a large bottom, and the conical body is coaxial with the kiln body (1) . 4. The vertical continuous calcining lime kiln according to claim 1, characterized in that: the calcining zone (5) comprises an annular combustion chamber (51) installed along the outer circumferential surface of the kiln body (1), the The kiln body (1) is provided with a flame nozzle (52) corresponding to the calcination zone (5). 5. The vertical continuous calcining lime kiln according to claim 4, characterized in that: the inner wall of the kiln body (1) is provided with an annular protrusion (53) above the burner port (52). 6. The vertical continuous calcining lime kiln according to claim 1, characterized in that: the lower part of the cooling zone (6) is provided with a funnel-shaped outlet (6). 7. The vertical continuous calcining lime kiln according to claim 1, characterized in that: the continuous discharge device (7) comprises a fixedly installed ash tray ( 71), the ash receiving tray (71) is provided with a reciprocating ash pushing plate (72), and the ash pushing plate (72) is power-connected to a reciprocating driving device through a push arm (73). 8. The vertical continuous calcining lime kiln according to claim 7, characterized in that: said reciprocating drive device comprises a motor (74), a gearbox (75) power-connected with said motor (74), said The power output end of the gearbox (75) is equipped with a balance wheel (76) hinged with the push arm (73). 9. The vertical continuous calcining lime kiln according to claim 8, characterized in that: the motor (74) is a variable frequency motor. 10. The vertical continuous calcining lime kiln according to claim 1, characterized in that: a receiving hopper (81) is provided below the continuous discharge device (7), and the discharge port of the receiving hopper (81) is A belt conveyor (8) is provided.

Images