The new coal gangue sintered brick tunnel kiln debugging and other baked brick kiln baking debugging has different characteristics. The author according to the survey of the many manufacturers and personal experiences are, in the process of drying kiln fire speed, temperature control is difficult, a bit not careful, will lead to unimaginable consequences. Furnace is the heart equipment manufacturers of thermal, many manufacturers in the process of drying kiln debugging, debugging scheme of coal gangue sintered brick kiln with clay, shale, fly ash sintered brick kiln scheme of equal treatment, it was a in the drying kiln time differences; Three is improper problems post-processing, bake the unnecessary extra damage. In view of this first of all, we must understand the severity, and then select the reasonable drying tuning scheme, the kiln of the independent thermal technology equipment can run normally. The following about the author's shallow understanding for manufacturers.
Improper baked in the process of the first analysis of the seriousness of consequences: drying kiln is the main task of the exclusion of kiln body moisture, debugging is kiln in daily production process that can adapt to the production of roasting properties of products. Kiln during the production, we must identify the relationship between dynamic and static, production is dynamic, don't stop kiln production is static. Kiln the point here is to bake the handling to grasp the dynamic in the process of reflection, always pay attention to the way; If the drying kiln system and debugging scheme is not reasonable, will produce a negative chain reaction, such as kiln body cracking, thermal disorder, kiln body leak, causing poor air tightness, shorten the service life of the kiln, kiln body structure deformation, sometimes causing partial collapse, or out of pressure and temperature control, poor regulatory series of reflection, easy to cause the whole production line. In order to make the kiln to normal working state, the following aspects of work must be done.
Comprehensive review of ___________ before drying kiln
Step in the process of inspection, check the rest part first, then check that the dynamic and power control part.
Kiln body of concealed work inspection record whether meet the design of construction drawings and the relevant regulations of the state of the kiln construction specification standards.
A check each part of the kiln body outside of geometry size, it fits the position of the static parts with moving parts.
C the expansion joint and structure joint residual left, is there a comprehensive clean with flue duct construction debris.
D sand sealing groove deformation phenomenon, joint is sealed, sand tube unblocked, sand sealing groove should be noe fine sand loading is not more than 3 mm, loading height general with top 25 mm below the sand sealing plate is preferred.
E furnace orbit with kiln car carrier at the time of the inspection, rail joint expansion joints if there is a wall, fixed bolt and the compacted plates, positioning pin to tighten checks, kiln car with orbit check below.
F the kiln, kiln and kiln is working within the tao, as a result, good mark on the wall at the top of the kiln and kiln vehicle parking, is advantageous to the observation and detection.
G, temperature and pressure testing point is in place, to check whether there is open circuit phenomenon, circuit safety protective measures are in place.
H all pastry operation safety protection measures are in place, fire fighting measures whether reach the standard specification.
I wicket seal and lifting position. Required to seal, flexible operation, stable, positioning accuracy, shuttle buses, pull machine accurately in place, hydraulic machine hydraulic part of the seal is tight, if we were in place and smooth trip.
J kiln car loading items, to check whether the kiln car joint is homogeneous, tight and smooth, grit plate with sand sealing groove size are consistent, kiln car to walk back and forth in the stove two laps.
K fan is the key equipment of the kiln. So, must be strict inspection of the fan. Fan operation, must be implemented in accordance with the requirements for manual operation of lubricating oil, water cooling system to open, to indicate the valve open and close direction, when the related fan, idling must achieve more than 4 h, if there is no abnormal phenomena are converted to full capacity more than 12 h, check whether there is the phenomenon such as noise and oil spills.
M the fasteners on the kiln body pillar, tie rod, the foot arch beam is installed, such as welding points are up to standard specification, the need to overhaul.
2. The preparing work before drying kiln system
A organization, establishment of drying the leading group, overall command drying work.
B, mechanical, electrical, thermal, none professionals such as individual, responsible for the work within the scope of the facilities for comprehensive inspection and maintenance.
C, do a good job log records.
D production base, brick machine per shift production not less than 50000 pieces of ordinary brick. During the drying kiln should be calorific value within the strict control of raw materials.
E materials needed for the ignition and utensils
30000 (1) sintering good common red brick block;
(2) the fire stove, 2 sets (including the secondary drying kiln with)
(3) cutting firewood about 6 m3;
(4) coke 5 t;
(5) the lump coal 25-30 t;
(6) diesel using 40 kg ignition;
(7) the fire drill 2 (￠18 L = 3000 mm);
(8) hook will 4 (￠10);
(9) three hopper (coal, slag, etc);
4 (10) emergency light;
(11) adobe KP1 200000 pieces;
(12) three torches;
14 (13) a spade;
1 (0 ℃ (14) thermocouple - 1200 ℃).
(15) heat preservation cotton 1 m3.
3. The drying step is divided into two stages
(1). The first stage for low temperature:
A. indoor temperature 0 ℃ low temperature drying kiln - 600 ℃, belongs to the water phase, all the fan gate first shut down the tunnel kiln, in a few minutes before the ignition on the exhaust fan, three sets of gate is ajar, before the adjustment will open to the ideal position transducer.
B. from the kiln car into the parking space in August, after the fire, slowly push kiln car, to small fire baking kiln body to eliminate moisture, the moisture removal fan had eight when parking, can prolong bake, roast solution for: 0-12 h for 8 x 8 parking time; 9-12 parking Spaces for 4 x 12 h; 13-23 parking Spaces for 20 x 12 h; 24 parking Spaces to the end of each parking for 8 h.
C. start the exhaust fan, make stove is in negative state, fan gate opening will be subject to not to smoke outside the furnace. 3 h before and after the fire stove into every car parking Spaces within the temperature not too high, control under 200 ℃, coal and coke used after blending, yan fire car coking oven. Around the fire car of the clearance between the kiln wall and with heat preservation cotton stuffing, the kiln temperature control within 600 ℃, the highest in this way, the low temperature drying kiln to one paragraph.
(2). The second stage for high temperature drying kiln:
A high temperature drying kiln stage since cast coal and coal, and coal must be accompanied by a fan to adjust when the kiln temperature. Adobe has also begun to every once in a while in a car, and strictly monitor the kiln firing conditions and according to the temperature curve to control the furnace heating up speed.
B when the temperature reaches 700 ℃, the voltage regulation cooling fan, air duct under the open car will wicket drum cooling fan and fan start to smoke waste heat, strictly control the furnace pressure balance.
C when the temperature reaches 800 ℃, start the drying kiln in high temperature flue gas, when the billet car into 30 parking Spaces, the drying kiln to send all the heat source.
D when billet car into 28 parking Spaces, started the furnace heat exchange system, namely less coal or coal, observe tile internal combustion and into the car speed, air volume is reasonable, and make reasonable adjustment, ensure the normal operation of kiln using regulating kiln operation.
E when the temperature reaches 1100 ℃, bake the whole process of kiln is come to an end. At the same time the first car brick also corresponding kiln, table 1 for high temperature drying kiln system (for reference). High temperature drying kiln system table (1)
Serial number temperature (℃) time (h) (h) the cumulative time temperature (℃ / h)
1 0-200 1 1 66 3
2, 200-2, 3, 18 June 300
1 4 0 3 3 300 (insulation)
4, 300-350 1 5 18 3
5, 350-450, 9 10 12
6, 450-600 10 to 50 3 1
0.5 10.5 0 and 1.5 7, 600 (thermal insulation)
13 27 8 60-800 2.5 7.5
1 0 3 of 14 September 800 (insulation)
10, 800-900 1 15 33.3 3
11, 900-1100 3 18 November 9
4. Drying kiln
(1). During the drying kiln must do is three: a fire prevention, due to the drying kiln for coal, slag in the furnace during, especially the kiln car easy to cause fire with fire, so be fortified, specify modes, set up fire extinguishing tools; Two gas poisoning prevention, because workers are the first time to participate in the drying kiln, in the work to add coal, slag, check the furnace operation, easy to smoke smoked one accident; Three mechanical bruising, mechanical working, motion and flow, logistics, often cross, fight bruised.
(2). Beware of accident during drying kiln technology, in strict accordance with the heating temperature curve, prevent excessive heating up, lest cause kiln body deformation, such as an accident. Keep HengWen time, to prevent the occurrence of residual moisture in kiln body, to prevent the high temperature burning kiln body. Strict inspection adobe kiln car, clamps is stable, neat. Prevent billet in the furnace back or wipe kiln wall. Check the top car, pull machine whether smooth, to avoid accident such as cars, carts kiln the occurrence of the phenomenon of the billet. Strictly grasp into furnace bricks moisture, moisture must meet reasonable requirements, never let the unqualified moisture content on the adobe code of kiln car.
