CN213739209U - Automatic coal feeding vertical environment protection lime kiln - Google Patents

Abstract

The utility model relates to an automatic coal feeding vertical environment-friendly lime kiln, which comprises a kiln cylinder, a kiln door, a kiln top and a furnace hall, wherein the kiln door is provided with a front door and a rear door, a chain trigger is arranged between the front door and the rear door and passes through the kiln cylinder, a head wheel of the chain trigger is arranged outside the rear door, a tail wheel is arranged outside the front door, the chain trigger is arranged on a chain frame, the chain frame is of a ditch-shaped structure, a first wheel and a tail wheel are arranged on a ditch side, a chain belt is arranged between the first wheel and the tail wheel to rotate, the first wheel is driven by a motor, limestone in a kiln barrel is built above the chain belt to form an arch to form a furnace chamber, a coal feeder is arranged outside a rear door to automatically feed coal to the chain belt to be conveyed into the furnace chamber to burn and heat the limestone above the arch, burnt slag is automatically conveyed outside a front door, an exhaust pipe connected with a smoke window or a waste gas treatment system is arranged on a kiln top to suck smoke in the kiln barrel to form airflow, the front door is provided with a door leaf, the kiln top is a movable conical top cover, and a hoisting lifting lug is arranged on the top cover. The utility model discloses no coal is thoughtlessly joined in marriage with the lime stone, need not the coal and grades, and lime is of high quality, and the environmental protection is high-efficient.

Description

Automatic coal feeding vertical environment protection lime kiln

Technical Field

The utility model relates to a lime production facility, especially an automatic vertical environmental protection limekiln of coal feeding.

Background

Lime is one of the most basic and earliest used building and decoration materials, and is also a common ingredient or raw material in the industries of medicine, food, chemical industry and the like. The wide application of lime makes people pay more attention to the production of lime. The production method of lime is to calcine limestone, that is, common calcium carbonate to make it become calcium oxide.

Earlier traditional lime production facility was with the lime kiln, burnt several days or even tens of days in succession with the firewood or charcoal fire, piled the lime stone in the cave dwelling, and the lower fire that burns lets the flame smoke and dust pass the gap of lime stone, heats the stone, lets the stone slowly change into calcium oxide. The method has the disadvantages that the fuels such as firewood, charcoal and the like must be added into the kiln continuously by someone, generally, the lime burning in the kiln generally needs about 30 days continuously, a large amount of fuels are needed, more workers must be used for alternately adding the fuels day and night, and the production cost is higher. Another problem is that the smoke generated in this way is discharged into the atmosphere, and although people locate the lime kiln in a place that is too far away, pollution to the atmosphere is inevitable.

Modern lime production adopts some modern technologies, such as mixing and burning limestone and lump coal, and the like, and the equipment is a vertical lime kiln. The vertical lime kiln is characterized by that the coal particles (generally low-fixed carbon coal, such as brown coal, etc.) and limestone are mixed according to a certain proportion, then placed in the kiln, heated, and blown to support combustion, and similar to blast furnace ironmaking, the difference is that the ore in the blast furnace is finally changed into molten iron and sunk, and the final quick lime of lime kiln and cinder ash are mixed together. And (4) taking the cooled mixture out of the kiln through ash discharging equipment. Another problem is that the vertical limekiln has strict requirements on coal particles, generally 5-10cm, and the coal powder less than 5cm cannot be mixed into stone, otherwise the ventilation of the limekiln is affected to cause partial burning or dead limekiln. Therefore, the small-particle coal and the pulverized coal which are less than 5cm cannot be used, and grading equipment must be added, so that waste is caused, the cost of production enterprises is increased, the equipment and plant investment is increased, and the benefit is reduced. In the face of this problem, it is desirable to have a technique or apparatus that allows low value pulverized coal to be used for stone production without compromising lime quality. But no such technology has emerged so far.

Disclosure of Invention

Therefore, the utility model provides an automatic vertical environmental protection limekiln of coal feeding makes it can produce according to the mode of traditional shaft kiln, but coal does not mix with the lime stone and thoughtlessly join in marriage, also need not carry out the thickness to coal and classify, and the lime that obtains is of high quality, and the environmental protection is high-efficient to this is solved the not enough of prior art.

The utility model provides a vertical environmental protection lime kiln of automatic coal feeding, it has kiln section of thick bamboo, kiln door, kiln roof and stove hall, its characterized in that the kiln door has qianmen and back door, has the chain trigger between qianmen and back door through crossing the kiln section of thick bamboo, and the head wheel of chain trigger is outside the back door, and the tail wheel is outside the front door, and the chain trigger is installed on the chain frame, the chain frame is a ditch shape structure, and head wheel and tail wheel dress are on the ditch group, and the chain belt dress rotates between head wheel and tail wheel, and the head wheel is by motor drive, and the lime stone in the kiln section of thick bamboo is built into the hunch hole and forms the stove hall in the chain belt top, has the coal feeder outside the back door to carry into the stove hall burning on the chain belt automatically for the lime stone of heating hunch hole top, the slag of having burnt is automatic to be carried outside the front door, has the flue gas in the blast pipe kiln section of thick bamboo that is connected with cigarette window or exhaust-gas treatment system to form the air current.

The front door is provided with a door leaf for closing the door opening to facilitate the discharge of the burnt lime from the kiln and reduce heat loss, and the rear door is just enough for conveying coal to avoid heat loss.

The kiln top is a movable conical top cover, and a lifting lug is arranged on the top cover so as to be convenient for lifting the kiln top to load materials and covering the kiln top again.

The kiln barrel wall is lined with a heat preservation layer and a fire-resistant layer on the inner side, the heat preservation layer is clamped between the barrel wall and the fire-resistant layer, the heat preservation layer is made of heat preservation materials, and the fire-resistant layer is built by refractory bricks.

The bottom surface of the kiln cylinder is a slope inclined towards the chain belt so as to facilitate building of arch holes.

And an air pipe in the chain frame is communicated between the upper side and the lower side of the chain belt to supply oxygen to the furnace hearth, and the air pipe penetrates through the bottom of the kiln to be connected with an external fan.

The bottom of the chain frame is a flat plate and is close to but not contacted with the lower side of the chain belt so as to scrape slag falling to the bottom to the head end for removal.

The chain belt is formed by connecting the transmission chains on two sides and the connecting chain in the middle end to end through a chain pin, the head wheel is composed of at least two coaxial chain wheels, one transmission chain corresponds to one chain wheel, the chain wheels are in meshed transmission with the chain sheets of the transmission chains, and the tail wheel is a cylindrical wheel.

The tail wheel is installed on the tightening device of the chain frame so as to facilitate the tightness of the chain belt, the head wheel is connected with the motor through the transmission for transmission, and the motor is a stepless speed regulating motor so as to facilitate the adjustment of the moving speed of the chain belt according to the requirement.

And slag conveyors are arranged beside the first wheel and the tail wheel to automatically convey slag to a slag yard for storage and treatment.

The working principle of the utility model is as follows:

before opening the kiln, firstly, the kiln top is lifted by a crane and the like, an arch slightly higher than a rear door is built above a chain belt in the kiln cylinder by limestone blocks to form a furnace hearth, the limestone blocks by blocks are piled up after the arch is stabilized until the whole kiln cylinder is filled, then the kiln top is covered again, and the exhaust pipe is connected with a chimney or a waste gas treatment system. The method comprises the steps of feeding coal to a chain belt by a coal feeder, starting a chain plate machine to convey the coal into an arch hole, stopping the coal in the arch hole, igniting the coal in the arch hole by using inflammable substances such as diesel oil, gasoline and the like, heating a kiln cylinder to the temperature at which the coal is inflammable, slowly starting the chain plate machine to move the chain belt to a front door, continuously conveying the coal into a hearth by the coal feeder to burn, starting a fan to adjust air volume, blowing air into the lower part of the chain plate to support combustion of the hearth, connecting an exhaust pipe on the top of the kiln with a waste gas treatment system or a chimney to form suction force, conveying waste gas, smoke dust and the like generated by burning into the waste gas treatment system through a limestone gap through the exhaust pipe, removing sulfur dioxide, carbon oxides and solid particles in the waste gas, purifying the waste gas, and then discharging the purified waste gas into the atmosphere to achieve zero-pollution discharge.

When the temperature of the kiln barrel is raised to about 1000 ℃, coal entering the furnace hearth is quickly combusted, the coal is basically burnt out when the coal is burnt out of the furnace hearth, and the residual slag falls off at the tail wheel of the chain scraper machine and enters a subsequent slag conveyer to be automatically conveyed to a slag yard for storage. Thus, a stable heating process of automatic coal feeding and continuous combustion is formed, and the limestone in the whole kiln is changed into quicklime blocks after 15 to 20 days. And closing the chain plate machine, the coal feeder, the fan and other equipment, and opening the front door to discharge from the kiln after the fire in the furnace chamber is completely combusted and automatically cooled.

During the combustion process, the door leaves on the front door are closed to reduce heat loss. And opening the furnace when the furnace is taken out. Ash residue on the lower side of the chain plate is automatically scraped to a slag runner or a slag conveyor at the end of the first wheel by the chain belt and is conveyed away.

And after the kiln cylinder is emptied, repeating the above process and carrying out the next production.

The invention is characterized in that the automatic coal feeding combustion is carried out without manual coal feeding, thereby not only reducing the labor intensity, but also saving the labor cost, improving the work efficiency, stabilizing the coal feeding supply and ensuring the continuous and stable kiln temperature; coal is not mixed with limestone, the burnt lime is pure and has better quality than common vertical lime, the coal is not classified, granular coal and pulverized coal can be put into a kiln for burning, the coal cost is reduced, the generated waste gas and smoke dust are hermetically discharged and treated by a waste gas treatment system, no pollution is caused, and the method is clean and environment-friendly.

In a word, the utility model discloses can produce with the mode of traditional shaft kiln, coal does not thoughtlessly join in marriage with the lime stone, also need not coal thickness hierarchical, has thoroughly solved the use problem of tiny particle coal and fine coal, and the lime of output is of high quality, and the environmental protection is high-efficient, low-cost high benefit.

Drawings

Fig. 1 is a front view (front sectional view) of the present invention.

Fig. 2 is a right side view (partially omitted).

Fig. 3 is a plan view (with the coal feeder omitted).

Fig. 4 is a front view of the head wheel.

Fig. 5 is a front left view.

Fig. 6 is a front view of the tail wheel.

Fig. 7 is a left side view of the tail wheel.

FIG. 8 is a front view of the drive link.

FIG. 9 is a left side view of the drive link.

FIG. 10 is a top plan view of the drive link.

Fig. 11 is a front view of the connecting link.

Fig. 12 is a left side view of the connecting link.

Fig. 13 is a top view of the connecting link.

FIG. 14 is a schematic view of a strand structure.

In fig. 1-14, the various components are numbered as follows:

1-a kiln base; 2-first round; 3-a chain belt; 4-a coal feeder; 5-kiln cylinder; 6-insulating layer; 7-a refractory layer; 8-limestone; 9-movable kiln top; 10-hoisting lugs; 11-an exhaust pipe; 12-a rear door; 13-furnace hearth; 14-front door; 15-air pipe; 16-a tail wheel; 17-a base plate; 18-a chain frame; 19-a hinge; 20-door leaf; 21-a transmission; 22-a motor; 201-a sprocket; 301-drive link; 302-linking the flaps; 303-chain pin.

The sprocket teeth of the first wheel in fig. 4-5 are shown as only one tooth, and the others are omitted by simple drawing.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1-14, the kiln base 1 is generally constructed by reinforced concrete to form a basic table shape, a groove for installing the chain frame 18 and a channel for discharging slag are reserved on the kiln base, an air pipe 15, foundation bolts for installing the speed changer 21 and the motor 22, and the like are pre-buried. The chain frame and the bottom plate 17 are welded into a groove shape by steel plates, groove sides at two sides are hollow, and an air pipe penetrates through the groove sides and blows air to the upper side and the lower side of the chain belt. The head pulley 2 and the tail pulley 16 are mounted on one end of the rear door 12 and one end of the front door 14 of the chain frame, respectively, by means of a bearing or the like. As described above, the tail pulley shaft is mounted on the tightening unit in order to facilitate adjustment of the tightness of the chain belt. The head wheel is composed of a wheel shaft and chain wheels 201 on the shaft, and the number of the chain wheels is not less than two and is corresponding to the number of the transmission chains. The chain wheels are three chain wheels, which are in accordance with the three transmission chains at the edge and the middle of the chain belt and are in meshed transmission. The tail wheel is a cylindrical wheel. Two sides of the chain frame are close to the chain belt to prevent the chain belt from deviating.

The chain belt is also called a chain plate, the driving chain and the connecting chain are formed by connecting the driving chain sheet and the connecting chain sheet end to end, and the chain belts are formed by connecting chain pins across and in opposite seams. The chain belt, the head and tail wheels, the speed changer and the motor form a chain belt machine, which is also called a chain plate machine.

The kiln cylinder 5, the insulating layer 6 and the refractory layer 7 are basically the same as those of the existing vertical lime kiln. However, the utility model has a rear door 12 and a front door 14, the two doors are arranged on the front wall and the rear wall of the kiln cylinder in pairs, the rear door is smaller, and the chain belt can transport the coal to reduce the heat loss as much as possible. The front door is convenient for taking out the furnace slag, so that the front door is made to be larger, two door leaves are arranged at the part above the chain belt, the front door is closed after normal combustion, and the front door is opened when the furnace slag is taken out.

The movable kiln top 9 is made into a cone shape, the inner surface of the movable kiln top can be lined with an insulating layer and a fire-resistant layer, and the outer surface of the movable kiln top is welded with a plurality of hoisting lugs 10 so as to facilitate the installation and uncovering of a crane. An exhaust pipe 11 is welded at the top of the kiln top, and a movable joint is arranged on the exhaust pipe so as to be connected with a waste gas treatment system or a chimney.

The kiln bottom inclines towards the chain belt to form a two-sided slope, when in use, arch holes are built by stones with regular shapes in the limestone 8 to form a furnace chamber 13, a front door and a rear door are communicated, and gaps are reserved on the arch top as much as possible so that flame heat can smoothly enter the stone layer.

The wind pipe is led in from the kiln seat and divided into a plurality of strands to enter the lower part of the chain belt for uniform wind supply.

The parts not mentioned are as described above.

According to the utility model discloses an actual conditions of a model, kiln dress building stones 900 supplyes 1000 tons once, burn 15-20 days in succession, can obtain net quick lime 500 supplyes 600 tons, with fine coal 160 supplyes 200 tons local brown coal. Compared with the traditional shaft kiln, the production period is shortened by 10-15 days, and the production cost is saved by more than 100 yuan per ton of lime. The quality of lime is superior to that of the traditional vertical kiln.

Claims (10)

1. The vertical environment protecting lime kiln with automatic coal feeding includes kiln barrel, kiln door, kiln top and kiln hearth, and features that the kiln door has front door and back door, chain plate set between the front door and the back door and passing through the kiln barrel, chain plate set with head wheel outside the back door and tail wheel outside the front door, chain plate set on chain frame in one ditch structure, chain belt between the head wheel and the tail wheel and rotating, motor driven head wheel, lime stone inside the kiln barrel set on the chain belt to form arch to form the kiln hearth, coal feeder outside the back door to feed coal to the chain belt for heating lime stone, burnt slag to the front door and exhaust pipe connected to the smoke window or waste gas treating system.

2. The vertical environment-friendly lime kiln with automatic coal feeding according to claim 1, wherein the front door is provided with a door leaf for closing the door opening, and the rear door is just enough for coal to be carried in so as to reduce heat loss.

3. The vertical environment-friendly lime kiln with automatic coal feeding as claimed in claim 1, wherein the top of the kiln is a movable conical top cover, and the top cover is provided with lifting lugs to facilitate lifting the top of the kiln to load and re-cover the top of the kiln.

4. The vertical environment-friendly lime kiln with automatic coal feeding according to claim 1, wherein the inner side of the wall of the kiln cylinder is lined with an insulating layer and a fire-resistant layer, the insulating layer is sandwiched between the wall and the fire-resistant layer, the insulating layer is made of an insulating material, and the fire-resistant layer is built by refractory bricks.

5. The vertical environment-friendly lime kiln with automatic coal feeding as claimed in claim 1, wherein the bottom surface of the kiln cylinder is a slope inclined towards the chain belt to facilitate building of arch holes.

6. The vertical environment-friendly lime kiln with automatic coal feeding as claimed in claim 1, wherein an air duct is provided in the chain frame to supply oxygen to the hearth between the upper and lower sides of the chain belt, and the air duct is connected to an external air blower through the bottom of the lime kiln.

7. The vertical environmentally friendly lime kiln of claim 1, wherein the bottom of the chain cage is a flat plate and is adjacent to but not in contact with the underside of the chain belt.

8. The vertical environment-friendly lime kiln with automatic coal feeding according to claim 1, wherein the chain belt is formed by connecting two transmission chains at two sides and a connecting chain in the middle end to end by using a chain pin, the head wheel is formed by at least two coaxial chain wheels, one transmission chain corresponds to one chain wheel, and the chain wheels are in meshing transmission with the chain sheets of the transmission chains.

9. The vertical environment-friendly lime kiln with automatic coal feeding according to claim 1, wherein the tail wheel is installed on a tightening device of the chain frame, the head wheel is connected with a motor through a transmission for transmission, and the motor is a stepless speed regulating motor.

10. The vertical environment-friendly lime kiln with automatic coal feeding according to claim 1, wherein slag conveyors are arranged beside the first wheel and the tail wheel to automatically convey slag to a slag yard for stockpiling and treatment.

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