CN2893594Y - Cement clinker firing equipment - Google Patents

Abstract

The utility model relates to a cement clinker firing equipment. The equipment is characterized in that the outlet of charging device is connected with a pre-heating drying-chamber which is connected with a fan through an air-pipe; the pre-heating drying-chamber is connected with a cooling-chamber through a hot-air mixing burner; the cooling-chamber is connected with a firebox through a material-sealing pipe; and the firebox is connected with the hot-air mixing burner through a hot-air pipe. The utility model is characterized in that the cement clinker firing equipment makes a pre-heating zone, a firing zone and a cooling zone of a traditional cement clinker firing system comparatively separated but organically unified. The pre-heating drying chamber, the firebox, the cooling chamber and the hot-air mixing burner all adopt a standing-style, which can largely raise the heat-transmitting rate of the system; and simultaneously the firebox is designed as a sub-system used for firing the cement clinker and reducing the impact of pre-heating zone and cooling zone on the cement clinker firing, so as to really realize the quick-firing and rapid-cooling of the cement clinker and achieve the automatic controlling and the production-expanding by a stable and continuous operation.

Description

The clinker calcination equipment

Technical field

The utility model relates to the clinker calcination equipment of brand new.Belong to the technology of producing cement field.

Background technology

At present, China's cement industry has adopted the kinds of processes technology, is divided into rotary kiln and shaft kiln two big classes generally.Rotary kiln comprises nsp kiln (being new type dry kiln), preheater kiln, dry method hollow kiln, lepol kiln, wet-process rotary kiln etc.; Be divided into native shaft kiln, ordinary shaft kiln and mechanical vertical kiln etc. in the shaft kiln.

In rotary kiln, the most advanced with nsp kiln (new type dry kiln), become the main body kiln type in the rotary kiln; In shaft kiln, be best with mechanized cement shaft kiln.In actual production, native shaft kiln is superseded substantially at present, and ordinary shaft kiln is also rare, mechanical vertical kiln account in the shaft kiln more than 90%.New dry process technology can realize maximizing, the automaticity height, and energy consumption is low, is better than mechanical vertical kiln technology greatly.All the time, because the new dry process technology investment is big, the construction period is long, the cement cost height of producing, so development speed is unhappy.Thirty years of age firer plants owing to small investment, instant effect, and product can be up to state standards, and can satisfy the demand of capital construction, is developed in decades.

At present, the kiln shape of the most of machine shaft kiln of China is that single horn is to be the straight barrel type kiln below the horn mouth, and this form defective is very big.The one, influence grog and move down and draw off, especially when bell mouth angle was inappropriate, the grog after the contraction can not waltz through salband and draw off, and influenced shaft kiln output; The 2nd, improper ventilation after kiln wind enters in the kiln from the bottom, is subjected to the resistance of material, and " apoplexy deficiency, limit wind surplus " can be caused greater than in the middle of the kiln in the space between kiln wall and the material in addition, the influence calcining; The 3rd, kiln inwall high more than 3 meters is arranged at kiln bottom, and to be casting liner plate become with steel is brick, and top then is built into refractory brick entirely.Operation back refractory wear is very fast, and liner plate, the wearing and tearing of steel brick are less, shaft kiln is formed at steel brick, liner plate place protrude annular steel ring together, cause the discharging difficulty, even the card kiln.

Shaft kiln calcination the most essential is the stable fire in a stove before fuel is added, make stable position and the thickness that just need control heat zone well of thermal regulation in the kiln, have only the fire in a stove before fuel is added steady, inclined to one side fire just can not appear, reduce leak living, the loss on ignition and the free calcium oxide of grog are reduced, improve clinker quality and shaft kiln output.

According to present shaft kiln kiln shape and ventilation form, do not reach the fire in a stove before fuel is added steadily, pull and stretch, the high temperature chamotte chilling of getting back not is very difficult, the workman that need have higher technical merit operates, and is careless slightly, fire in a stove before fuel is added pull and stretch and fiery partially phenomenon will occur, make shaft kiln burn till instability.

On air supply mode, most of shaft kiln is to ventilate from the bottom, promptly enters salband through discharger, from bottom to top discharges from chimney through high temperate zone, preheating zone.This form will inevitably cause the steam flow distributary phenomenon owing to be subjected to the influence of material resistance in the kiln.Middle part wind is few, and limit portion wind is big, because the uneven distribution of air-flow on the kiln cross section brought the difficulty that is difficult to overcome to vertical kiln operation, directly influences the cooling and the clinker quality of grog.

Influencing the equally distributed basic factor of air-flow is resistance, because solid accumulation and the influence that is subjected to the kiln wall in the kiln, the voidage of kiln periphery is always greater than the kiln middle part, like this, the gas flow of kiln periphery, flow velocity are also just greater than the kiln middle part, this has technical barrier to be overcome " apoplexy deficiency, the limit wind surplus " that come out in the vertical kiln operation for many years just to have occurred.

Summary of the invention

The purpose of this utility model is the defective at the existence of shaft kiln prior art, a kind of clinker calcination equipment of brand new is proposed, it is low that it has effectively overcome existing in prior technology system heat transfer efficiency, preheating zone, salband are big to the influence that grog burns till, and the fast burning chilling, steady and continuous operation that can't realize grog be defective such as control and maximization automatically.

Technical solution of the present utility model: clinker calcination equipment, its structure are that the outlet of feed arrangement connects the preheating drying chamber, and the preheating drying chamber joins by induced duct and air-introduced machine; The preheating drying chamber joins by hot gas mixing burner and cooling chamber; Cooling chamber joins by dipleg and combustion chamber; The combustion chamber joins by warm-air pipe and hot gas mixing burner.

Advantage of the present utility model: this cement clinker sintering technology and equipment thereof, with the preheating zone in traditional cement clinker sintering technology and the equipment thereof, clinkering zone, salband relative separation organic unity again, preheating drying chamber, combustion chamber, cooling chamber, hot gas mixing burner all adopt vertical structure, can greatly improve system's heat transfer efficiency, simultaneously the combustion chamber is set at a subsystem, being used for grog burns till, the influence that minimizing preheating zone, salband burn till grog, thus realize that really the fast burning chilling of grog, steady and continuous operation realize control automatically and maximization.

Description of drawings

Accompanying drawing 1 is an example structure schematic diagram of the present utility model

Among the figure 1 is raw material silo, the 2nd, current stabilization metering device, the 3rd, material water agitating device, the 4th, pan-pelletizer, the 5th, pellet conveying device, the 6th, preheating drying chamber, the 7th, combustion chamber, the 8th, cooling chamber, the 9th, warm-air pipe, the 10th, hot gas mixing burner, the 11st, dipleg, the 12nd, combustion chamber air blast, the 13rd, cooling chamber air blast, the 14th, tremie pipe, the 15th, grog conveyer, the 16th, induced duct, the 17th, cyclone dust collectors, the 18th, deduster, the 19th, air-introduced machine, the 20th, chimney.

The specific embodiment

Contrast accompanying drawing 1, its structure is that the outlet of feed arrangement connects preheating drying chamber 6, preheating drying chamber 6 joins by induced duct 16 and air-introduced machine 19; Preheating drying chamber 6 joins by hot gas mixing burner 10 and cooling chamber 8; Cooling chamber 8 joins by dipleg 11 and combustion chamber 7; Combustion chamber 7 joins by warm-air pipe 9 and hot gas mixing burner 10.

Described preheating drying chamber 6 joins by induced duct 16 and cyclone dust collectors 17; Cyclone dust collectors 17 join with deduster 18, and deduster 18 joins with air-introduced machine 19, and air-introduced machine 19 connects chimney 20.

Described cooling chamber 8 joins by tremie pipe 14 and grog conveyer 15.

Described preheating drying chamber 6, combustion chamber 7, cooling chamber 8 are respectively independent device.

Described feed arrangement is formed by raw material silo 1, current stabilization metering device 2, material water agitating device 3, pan-pelletizer 4, pellet conveying device 5 serial connections.

A kind of brand-new clinker production system is made up of pre-watering granulation machine, preheating drying chamber, combustion chamber, cooling chamber, hot gas mixing burner, dust pelletizing system and automatic control system.The black meal ball of making is preheated oven dry in the preheating drying chamber, in the combustion chamber, finish clinker and burn till reaction, the grog that sinters carries out fast fully cooling through cooling chamber again, hot gas source and combustible that combustion chamber and cooling chamber reclaim carry out second-time burning in the hot gas mixing burner, thermal current is for preheating drying chamber preheating oven dry pellet, and waste gas is handled through dust pelletizing system.

Production technology:

Complete black meal enters the raw material silo of weighing, and is measured by the current stabilization metering device, enters the raw material agitating device again and adds water and stir, and enters the pan-pelletizer balling-up; By the pellet conveying device, send into the oven dry of preheating drying chamber; The pellet of oven dry enters the combustion chamber and blasts under the situation of sufficient oxygen at the combustion chamber air blast, burn and (make stable position and the thickness that just need control heat zone well of thermal regulation in the kiln, inclined to one side fire just can not occur, reduce to leak and give birth to, the loss on ignition and the free calcium oxide of grog are reduced, improve clinker quality and shaft kiln output).Pellet burning finishes, and grog enters cooling chamber by dipleg, blasts at cooling air blower under the help of cold wind to cool off (free calcium oxide of grog is reduced, improve clinker quality and shaft kiln output).By tremie pipe, transfer out to the grog conveying device down again.

Cooling air blower blasts cold wind and enters cooling chamber, cold wind heats up by the cooling grog, hot blast adds the hot waste gas of being emerged by the combustion chamber, (cooling air blower blasts oxygen to enter the hot gas hybrid combustor together, contain unburned carbon monoxide and other combustible gas in the hot waste gas that comes out in the combustion chamber, in the combustion chamber internal combustion, the burning indoor temperature rises, effectively utilize preheating, cut down the consumption of energy); High-temperature gas is dried the indoor raw material ball of prebake in the combustion chamber, reduces the pellet water content, and grog burns till coal consumption in the saving combustion chamber, saves the production coal consumption.

Remaining gas and molecule in the preheating drying chamber, by induced duct, in cyclone dust collectors, it is bigger to select particulate, enters raw material silo.All the other molecules under collecting under the wind-force of air-introduced machine, enter raw material silo by deduster (reducing pm emission concentration, economical environment-protective).All the other waste gas are then by smoke stack emission.

The heat of a whole set of technology have one good recycling, greatly reduce grog and burn till and use coal, cut down the consumption of energy.In the gas of discharging, do not have harmful molecule, help environmental protection greatly.

Claims (5)

1, clinker calcination equipment is characterized in that the outlet of feed arrangement connects preheating drying chamber (6), and preheating drying chamber (6) joins by induced duct (16) and air-introduced machine (19); Preheating drying chamber (6) joins by hot gas mixing burner (10) and cooling chamber (8); Cooling chamber (8) joins by dipleg (11) and combustion chamber (7); Combustion chamber (7) joins by warm-air pipe (9) and hot gas mixing burner (10).

2, clinker calcination equipment according to claim 1 is characterized in that described preheating drying chamber (6) joins by induced duct (16) and cyclone dust collectors (17); Cyclone dust collectors (17) join with deduster (18), and deduster (18) joins with air-introduced machine (19), and air-introduced machine (19) connects chimney (20).

3, clinker calcination equipment according to claim 1 is characterized in that described cooling chamber (8) joins by tremie pipe (14) and grog conveyer 15.

4, clinker calcination equipment according to claim 1 is characterized in that described preheating drying chamber (6), combustion chamber (7), cooling chamber (8) are respectively independent device.

5, clinker calcination equipment according to claim 1 is characterized in that described feed arrangement is formed by raw material silo (1), current stabilization metering device (2), material water agitating device (3), pan-pelletizer (4), pellet conveying device (5) serial connection.