CN205740771U - A kind of lime shaft kiln combination type furnace roof - Google Patents

Abstract

The utility model discloses a kind of lime shaft kiln combination type furnace roof, there is kiln body, it is provided with furnace roof steel structure platform and roof support beam at kiln body top, furnace roof steel structure platform center is provided with distribution device, described distribution device is made up of care feed tray and averaging wind pipe, the upper end of averaging wind pipe is fixing with furnace roof steel structure platform and roof support beam to be connected, and lower end is fixing with care feed tray to be connected；Equipped with transition feed bin above described distribution device, transition feed bin top is equipped with closed cover plate, and the top of closed cover plate is equipped with emission of baiting chute, equipped with air valve on emission of baiting chute；Transition bin bottom is provided with tremie pipe, and tremie pipe inserts certain depth in kiln, and arranges with averaging wind pipe dislocation；This utility model revolutionizes the charging of lime shaft kiln, cloth and kiln discharge flue gas lead-out mode, make coal stone mix homogeneously in kiln, air flow method uniformly, furnace roof fault rate be zero, work process does not has ash-laden gas enter air, fundamentally improve the dust pollution of kiln body periphery.

Description

A kind of lime shaft kiln combination type furnace roof

Technical field

This utility model belongs to technical field of industrial furnaces, and specifically a kind of lime shaft kiln combination type furnace roof, this practicality is new Type is applicable to the lime shaft kiln with fine coal, lump coal, moulded coal or coke as fuel.

Background technology

China's Calx total output has been over 200,000,000 tons, account for the total consumption of Calx about 30% metallurgy lime, due to visitor Family ash quantity big and stablize, more and more higher to the requirement of product quality, therefore its technical equipment is in lime industry Leading position, such as rotary kiln, sleeve kiln and flow the accumulation of heat Shuan Tangyaodeng world gas-burning kiln overwhelming majority and gathered around by smelter Have；Account for building lime and the chemical industry ash of the total consumption of Calx about 70%, owing to user is scattered in city and the township of all parts of the country Village, client is little by ash quantity, and Product transport radius is little, this feature necessarily determine for building ash production many, wide, produce rule The general layout that mould is little, kiln type is to produce the earth kiln of 300 tons and old-fashioned boiler-turbine CCS daily.

All parts of the country spread all over the place countless bedstone ash earth kiln, and its yield accounts for more than the 90% of the total consumption of building lime, as The building lime of conventional industries produce the energy consumption structure based on coal will not radical change, carbon dioxide, sulfur dioxide, nitrogen The control emission of oxide and flue dust is the most urgent, has that scope of the enterprise is little, quantity is many, the most mostly in building lime industry development Number enterprises technological equipment backwardnesss, poor product quality, energy resource consumption height, environmental pollution is serious, resource utilization is low, production and operation not Specification, both waste national resources, again surrounding enviroment were caused severe contamination, be more degrading this most fragile ecological environment , listed in superseded register by country already, the paces that Calx earth kiln is eliminated in various places are more and more faster.

In order to change Calx earth kiln with waste resource and the sacrificialing environment mode of production as cost, quickening implementation cleaning life Produce, to improve quality, energy-conservation, save land, economize on water, profit is useless and pollution treatment fall haze direction is developed, as Calx earth kiln upgrading product New structure lime shaft kiln grows up like the mushrooms after rain, but new structure lime shaft kiln is of a great variety, the stone of current main flow Ash shaft furnace, its construction features is mainly reflected in the following aspects:

1. cloth system all uses screw distribution mode, and cloth center is fixed, and has drive mechanism, there is lime shaft kiln section Cloth is the most uneven, there is dead angle, and they all decrease the dischargeable capacity of lime shaft kiln, affects yield, and there is easy sending out The problem of raw mechanical breakdown；

2. level-sensing device is generally located on inside kiln body, and distance kiln crown 2～the position of 3 meters, in kiln, charge level reaches level-sensing device During position, just can carry out feed supplement, it is impossible to the seriality produced in ensureing kiln；

3. air inlet mode mainly uses kiln bottom air blast mode, there is the problem that around kiln body, dust pollution is serious, right Kiln body sealing property requires height, and smoke gas treatment is not thorough, and the waste gas that lime shaft kiln produces is the completeest in preheating zone and limestone Total heat exchange, EGT raises, and the most energy-conservation, limestone is not reaching to 700 DEG C and is put into burning zone, increases raw burn rate.

Due to the commonly used said structure of existing lime shaft kiln, cause kiln fuel, air flow method uniform not, knot The technology accident such as tumor, inclined burning takes place frequently, and product quality fluctuation is excessive；And belong to positive pressure operation, kiln body sealing property is required high, Flue-gas cleaning devices is simple and crude, still suffers from the halfway drawback of smoke and dust treatment.

Summary of the invention

It is not reasonable that the purpose of this utility model is aiming at the design of existing lime shaft kiln top construction, causes producing In journey, technology accident takes place frequently, and product quality fluctuation is big, and surrounding enviroment are polluted huge problem, it is provided that a kind of lime shaft kiln group Box-like furnace roof.

The technical solution of the utility model is: a kind of lime shaft kiln combination type furnace roof, has kiln body, sets at the top of kiln body Furnace roof steel structure platform and roof support beam, furnace roof steel structure platform center is had to be provided with distribution device, particularly: described cloth fills Putting and be made up of care feed tray and 3～6 averaging wind pipes, the upper end of averaging wind pipe is fixing with furnace roof steel structure platform and roof support beam even Connecing, lower end is fixing with care feed tray to be connected；Equipped with transition feed bin above described distribution device, transition feed bin top is equipped with closed lid Plate, the top of closed cover plate is equipped with emission of baiting chute, and the external charging equipment of emission of baiting chute, equipped with air valve on emission of baiting chute；Cross Crossing bin bottom and be provided with tremie pipe, tremie pipe inserts certain depth in kiln, and arranges with averaging wind pipe dislocation.

The tremie pipe of transition feed bin described in this utility model is positioned at center, kiln crown portion, divides equally pipe ring around tremie pipe surrounding Arrange.

It is also equipped with level-sensing device above transition feed bin described in this utility model, upper and lower two material are set in transition feed bin Position control line, described level-sensing device is radar type level-sensing device or Plumb-bob Material Level Meter.

This utility model is provided with a ring-shaped flue, ring-shaped flue upper end at described transition feed bin lower loop around transition feed bin Being tightly connected with the outer wall of transition feed bin, lower end is tightly connected with furnace roof steel structure platform；Described ring-shaped flue side is also equipped with Fume pipe is connected with flue gas purification system, the external high-pressure suction fan of flue gas purification system.

Equipped with flue gas exhaust stack on fume pipe described in this utility model, described flue gas exhaust stack diffuses equipped with flue gas Valve.

The transition feed bin in this utility model kiln crown portion, can store the enough lime shaft kilns coal of more than 1 hour (burnt) stone and mix Close material charge, and be provided with closed cover plate, level-sensing device and emission of baiting chute at transition feed bin top, be disposed with in transition feed bin Feeding, discharge position control line, when expecting in level-sensing device detects transition feed bin that position reaches blanking position control line, communicates instructions to feeding Equipment, the air valve on emission of baiting chute automatically opens up, and charging equipment automatically carries out feeding and supplements, when the material position in transition feed bin reaches During to feeding position control line, communicating instructions to charging equipment, charging equipment is automatically stopped feeding, the blanking chute above excessive feed bin Air valve on pipe is automatically switched off, and makes transition feed bin during carrying out feeding, and kiln crown is in sealing state all the time.Transition Materials Material in storehouse enters kiln body through tremie pipe, and owing to being provided with care feed tray below tremie pipe, surrounding is fixed with averaging wind pipe, when material warp When tremie pipe enters in kiln, first accepted by care feed tray, then under material Gravitative Loads space around averaging wind pipe spread to Kiln body periphery, bulk materials is repelled to kiln center through the arc precoated plate inclined-plane of kiln body preheating zone, and piece material is along Yao Qiang Wall glides and is trapped near kiln wall, makes coal (burnt) stone raw material be mixed further, and forms " the bottom of a pan " shape charge level.Thus effectively Avoid " kiln wall effect " that shaft furnace is intrinsic, reduce and even stopped the technique things such as the dross caused, inclined burning because limit wind is superfluous Therefore.

This utility model also has one to be improved by: arrange airtight ring-shaped flue at kiln crown, by with fume pipe flue gas Cleaning system and high-pressure suction fan are connected, thus change the flue gas lead-out mode that lime shaft kiln is intrinsic, by traditional Calx Shaft furnace, by kiln bottom air blast, changes into from kiln crown convulsion, and in order to strengthen the ventilation at kiln body center, at furnace roof care feed tray surrounding cloth Having put 3-6 averaging wind pipe, when high-pressure suction fan is drawn flue gas at furnace roof, the cold air of furnace bottom is in the big draft of high-pressure suction fan Under effect, through the bed of material gap of ash hoist Yu furnace bottom storage bin hopper, even into kiln body cooling zone, the most burned Calx is carried out cold But, making kiln discharge Calx temperature be reduced to less than 80 DEG C, cooling wind is heated simultaneously, participates in the combustion of fuel when arriving burning zone Burn, the CO that combustion product and decomposition of limestone go out₂Continue to move up, arrive preheating zone and carry out heat friendship with coal (burnt) stone raw material Changing, make limestone uniformly be preheated, when heat smoke arrives kiln crown distribution device, the flue gas of care feed tray periphery is through care feed tray periphery Bed of material gap rises in the ring-shaped flue of more than charge level, and the kiln body center flue gas in care feed tray lower cavity is then drawn by averaging wind pipe In the ring-shaped flue of furnace roof, thus strengthening the ventilation at kiln body center, the flue-gas temperature arriving ring-shaped flue drops to 150 DEG C Hereinafter, introduced in flue gas purification system by air-introduced machine.In lime manufacturing process, owing to whole furnace roof is in airtight negative pressure shape State, and it is provided with averaging wind pipe at furnace roof, under the big draft effect of high-pressure suction fan, greatly strengthen the logical of kiln body center Wind, can be alleviated or avoided " kiln wall effect " that shaft furnace is intrinsic effectively, the dross that reduces or stopped to cause because limit wind is superfluous, The technology accidents such as inclined burning.

This utility model is owing to changing the charging of lime shaft kiln, cloth and flue gas lead-out mode, and whole production process is Work under boiler roof sealing, the negative pressure state that furnace bottom opens wide, when normally producing, the high-pressure suction fan of furnace roof carry out air inducing, Realize uniform ventilation and the heat exchange of furnace interior, thus the temperature field of each section in having equalized stove, improve product quality, fall Low product energy consumption, and do not have ash-laden gas to enter air, fundamentally improve the dust pollution of kiln body periphery.

Accompanying drawing explanation

Fig. 1 is that master of the present utility model cuts open schematic diagram；

Fig. 2 is the top view (without emission of baiting chute) of Fig. 1；

Fig. 3 is the upward view of Fig. 1.

In figure, 1 kiln body, 2 furnace roof steel structure platforms, 3 roof support beam, 4 distribution devices, 5 care feed trays, 6 averaging wind pipes, 7 transition feed bins, 8 closed cover plates, 9 emission of baiting chute, 10 air valves, 11 tremie pipes, 12 material Position meter, 13 ring-shaped flues, 14 fume pipes, 15 flue gas purification systems, 16 high-pressure suction fans, 17 flue gas exhaust stacks, 18 flue gas diffusion valves.

Detailed description of the invention

Embodiment 1

Seeing Fig. 1～3, the technical solution of the utility model is: a kind of lime shaft kiln combination type furnace roof, has kiln body 1, kiln The top of body 1 is provided with furnace roof steel structure platform 2 and roof support beam 3, and furnace roof steel structure platform 2 center is provided with distribution device 4, special Not: described distribution device 4 is formed (being specially 4 in the present embodiment) by care feed tray 5 and 3～6 averaging wind pipes 6, averaging wind pipe 6 Upper end is fixed be connected with furnace roof steel structure platform 2 and roof support beam 3, and lower end is fixing with care feed tray 5 to be connected；Described distribution device Equipped with transition feed bin 7 above in the of 4, transition feed bin 7 top is equipped with closed cover plate 8, and the top of closed cover plate 8 is equipped with emission of baiting chute 9, the external charging equipment of emission of baiting chute 9, equipped with air valve 10 on emission of baiting chute 9；Tremie pipe 11 it is provided with bottom transition feed bin 7, under Material pipe 11 inserts certain depth in kiln, and arranges with averaging wind pipe 6 dislocation.

The tremie pipe 11 of transition feed bin described in the present embodiment 7 is positioned at center, kiln crown portion, is all in charge of 6 around tremie pipe 11 Surrounding is arranged.

It is also equipped with level-sensing device 12 above transition feed bin described in the present embodiment 7, in transition feed bin 7, arranges upper and lower two Level control line, described level-sensing device 12 is radar type level-sensing device or Plumb-bob Material Level Meter.

The present embodiment is provided with a ring-shaped flue 13, ring-shaped flue 13 at described transition feed bin 7 lower loop around transition feed bin Upper end is tightly connected with the outer wall of transition feed bin 7, and lower end is tightly connected with furnace roof steel structure platform 2；Described ring-shaped flue 13 1 Side is also equipped with fume pipe 14 and is connected with flue gas purification system 15, the external high-pressure suction fan of flue gas purification system 15 16.

Equipped with flue gas exhaust stack 17 on fume pipe 14 described in the present embodiment, described flue gas exhaust stack 17 is put equipped with flue gas Dissipate valve 18.

Claims (5)

1. a lime shaft kiln combination type furnace roof, has kiln body, is provided with furnace roof steel structure platform at the top of kiln body and furnace roof props up Support beam, furnace roof steel structure platform center is provided with distribution device, it is characterised in that: described distribution device is equal by care feed tray and 3～6 Airduct forms, and the upper end of averaging wind pipe is fixing with furnace roof steel structure platform and roof support beam to be connected, and lower end is fixing with care feed tray even Connect；Equipped with transition feed bin above described distribution device, transition feed bin top is equipped with closed cover plate, the top dress of closed cover plate Having emission of baiting chute, the external charging equipment of emission of baiting chute, equipped with air valve on emission of baiting chute；Transition bin bottom is provided with tremie pipe, Tremie pipe inserts certain depth in kiln, and arranges with averaging wind pipe dislocation.

A kind of lime shaft kiln combination type furnace roof the most according to claim 1, it is characterised in that: the blanking of described transition feed bin Pipe is positioned at center, kiln crown portion, divides equally pipe ring and arranges around tremie pipe surrounding.

A kind of lime shaft kiln combination type furnace roof the most according to claim 1, it is characterised in that: above described transition feed bin Being also equipped with level-sensing device, arrange upper and lower two Level control lines in transition feed bin, described level-sensing device is radar type level-sensing device or weight Hammer level-sensing device.

A kind of lime shaft kiln combination type furnace roof the most according to claim 1, it is characterised in that: in described transition feed bin bottom Being provided with a ring-shaped flue around transition feed bin, ring-shaped flue upper end is tightly connected with the outer wall of transition feed bin, lower end and furnace roof steel Structure platform is tightly connected；Described ring-shaped flue side is also equipped with fume pipe and is connected with flue gas purification system, flue gas purification system External high-pressure suction fan.

A kind of lime shaft kiln combination type furnace roof the most according to claim 4, it is characterised in that: on described fume pipe equipped with Flue gas exhaust stack, equipped with flue gas diffusion valve on described flue gas exhaust stack.