CN109704293A - A kind of roasting method relieving haperacidity fluidized bed furnace ignition method - Google Patents
A kind of roasting method relieving haperacidity fluidized bed furnace ignition method Download PDFInfo
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- CN109704293A CN109704293A CN201811556687.1A CN201811556687A CN109704293A CN 109704293 A CN109704293 A CN 109704293A CN 201811556687 A CN201811556687 A CN 201811556687A CN 109704293 A CN109704293 A CN 109704293A
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Abstract
The invention discloses a kind of roasting method relieving haperacidity fluidized bed furnace ignition methods, using furnace slag discharge either raw material of the cobbings as fluidized bed furnace matting layer of the troilite concentrate acid making system fluidized bed furnace of 46% or more sulfur-bearing, it assists carrying out matting layer heating by the way of heat transfer using heat radiation, different degrees of boiling operation is carried out according to temperature rise curve is intermittent, the stability and reliability for making fluidized bed furnace ignition control are increased substantially, not only increase the success rate of boiling furnace igniting, and between having done sth. in advance during normal production significantly, operator is also ensured simultaneously, the safety of production equipment, the production run cost of enterprise can be substantially reduced.
Description
Technical field
The present invention relates to chemical production technical fields, and in particular to a kind of roasting method relieving haperacidity fluidized bed furnace ignition method.
Background technique
Roasting method relieving haperacidity enterprise is all mating to have fluidized bed furnace, has just been constructed and put into operation in process units or device stops for a long time
After machine overhauling, fluidized bed furnace requires to carry out heating igniting, and currently used fluidized bed furnace firing technique has: first is that in fluidized bed furnace burner hearth
Bottom is laid with the clean river sand of 600mm or so, then in the middle part of burner hearth position on the lower side with natural gas (or liquefied gas or diesel oil etc.
Fuel) firelock heated, and gradually rise the river sand temperature of fire box temperature and matting layer, and open while heating empty
Enraged blower carries out boiling operation to matting layer river sand, so that river sand is made uniformly to heat up under heat transfer and the form of thermal convection,
Start the production that gradually feeds intake after reaching technique Minimum ignition temperature；Second is that being laid with the thin of 600mm or so in fluidized bed furnace burner hearth bottom
Troilite (or troilite and sulfur compounds or pyrite cinder and sulfur compounds), then in the middle part of burner hearth position on the lower side with
Natural gas (or the fuel such as liquefied gas or diesel oil) firelock is heated, and makes fire box temperature and the troilite temperature of matting layer gradually
It increases, and opens air-blaster while heating and boiling operation is carried out to matting layer troilite, so that troilite be made to exist
Uniformly heat up under heat transfer and the form of thermal convection (heating later period matting layer troilite or sulfur moiety start smoulder, from
And accelerated warming), start the production that gradually feeds intake after reaching technique Minimum ignition temperature.With upper type in roasting method relieving haperacidity fluidized bed furnace
It is all more commonly used technology in ignition control.
Since boiling furnace igniting should ask the matting layer of fluidized bed furnace that can be rapidly achieved the minimum control temperature of technique igniting, again
It has to ensure that the temperature of matting layer is uniform as far as possible, comprehensive burning of raw material lays the foundation after feeding intake for the later period.The first igniting
Technology, since river sand granularity is uneven, containing certain moisture, boiling gets up to ensure uniformity of temperature profile, and empty
For enraged blower during carrying out air blast boiling, Boiler pressure control is too small to cause boiling effect poor, and Boiler pressure control is larger will
More heat is taken away, and thinner particle is taken to outdoor with air-flow, to cause biggish cost waste and environment dirty
Dye, and the time of heating igniting is greatly prolonged, influence the performance of enterprises.Second of firing technique, due to the later period matting layer sulphur that heats up
Iron ore or sulfur moiety start smoulder, and the sulfur dioxide and part sulfur trioxide and the troilite of relatively fine particle of generation are just
Outdoor can be taken to flue gas, cause environmental pollution and equipment to corrode, safety and environmental protection pressure are larger；Either flue gas is directly entered
System pipeline, is not present environmental pollution, but due to flue gas cannot be dusted, demisting (there may be inflammable gas in flue gas,
Have risk of explosion inside the high voltage electric fields such as electric precipitator, electrostatic precipitator) processing, cause dirt, mist etc. that can all be brought to subsequent turn
Chemical industry section causes large effect to conversion catalyst, influences catalyst cycle, and conversion ratio etc. is even influenced when serious.
Therefore, used two kinds of firing techniques all exist the heating duration of ignition is long, energy consumption is big, environmental pollution is serious,
The disadvantages such as ignition control difficulty, and ignition success rate be not it is very high, needed when more when feeding intake with heating gun after
Continuous heating, this all causes more serious negative effect to purification section and conversion finished product workshop section, at the same to enterprise security, efficiently,
Energy-saving and environmental protection production also results in large effect.
Summary of the invention
In view of the above-mentioned problems, the present invention provides a kind of roasting method relieving haperacidity fluidized bed furnace ignition method, it is substantially shorter fluidized bed furnace
It heats up the duration of ignition, reduces safety and environmental protection pressure, guarantee the high efficiency and safety of system operation, improve working efficiency, thus
The production capacity and competitiveness for improving enterprise, create more profits.
To achieve the above object, the technical scheme is that
A kind of roasting method relieving haperacidity fluidized bed furnace ignition method, comprising the following steps:
Step 1: selecting furnace slag discharge or the cobbings conduct of sulfur-bearing 46% and the above troilite concentrate acid making system fluidized bed furnace
The raw material of fluidized bed furnace matting layer；
Step 2: the matting layer raw material of 500mm~600mm thickness are laid with more than boiling furnace bottom blast cap；
Step 3: it carries out a Cold Boiling and rises operation, keep matting layer raw material arrangement more uniform, meanwhile, progress micro-boiling,
The boiling test of mine air quantity is thrown in middle boiling, so that it is subsequent when carrying out micro-boiling, middle boiling, throwing the boiling operation of mine air quantity, it is each to control
Parameter is more accurate, and fire door is sealed up after the completion of test；
Step 4: lighting heating gun and carry out heat temperature raising, gradually heated up according to fluidized bed furnace heating curve, when burner hearth bottom
When portion's air layer temperature reaches 500 DEG C or so, micro-boiling operation is carried out；
Step 5: the temperature changing trend at monitoring matting layer 250mm, in the case where temperature increase rate reduces, to paving
Bed course carries out the middle boiling operation of a 3~5min, and top high temperature warm sludge and bottom low temperature slag is made to carry out boiling rolling one up and down
It is secondary；
Step 6: control burner hearth bottom air layer temperature is between 650 DEG C~850 DEG C, and furnace exit mouth temperature is at 700 DEG C
Left and right；
Step 7: continuing to be controlled according to the parameter request of step 6 on the basis of step 5, at this point, matting layer slag exists
Low temperature slag is heated between the upper and lower lower beginning quick centring of high temperature heat radiation effect；
Step 8: after the temperature at matting layer 250mm reaches technique lowest reliable firing temperature, carrying out a 2~3min
Throwing mine air quantity boil operation, guarantee matting layer uniformity of temperature profile, if throw mine air quantity boiling operation after, at matting layer 250mm
Temperature be able to maintain it is constant or rise, into next step, otherwise continue according to step 5-8 carry out circulate operation；
Step 9: stop heating gun completely, starts to feed intake production according to 80% or so of normal produce load, can after 15min
So that purification section is transferred to normal operating conditions, normal production is then transferred to according to fluidized bed furnace temperature conditions in due course.
Furnace slag discharge described in step 1 or the sulfur content of cobbings are 0.002% or less.
Micro-boiling described in step 3 refers to that 30% or so matting layer raw material reach fluidized state and boil total high
Degree is not higher than 100mm.
Middle boiling described in step 3 refers to that 80% or so matting layer raw material reach fluidized state.
The boiling of throwing mine air quantity described in step 3 refers to that 100% matting layer raw material reach fluidized state and boil total
Height is in 700mm or so.
The time interval that temperature increase rate described in step 5 reduces is 30min~60min.
Technique lowest reliable firing temperature described in step 8 is 550 DEG C.
Compared with prior art, the present invention the beneficial effect is that:
1, using the either cobbings conduct of the furnace slag discharge of the troilite concentrate acid making system fluidized bed furnace of 46% or more sulfur-bearing
The raw material of fluidized bed furnace matting layer, this material both ensure that the uniform of granularity (influenced boiling without bulky grain, also without little particle
Environmental pollution can be caused with flue gas discharge outdoor), make heating efficiency raising of boiling, and exist and sulfurous gas, cigarette without moisture
Dirt generates, and avoids environmental pollution, can the safe operation such as effective guarantee conversion catalyst.
2, it assists carrying out matting layer heating by the way of heat transfer using heat radiation, in the identical temperature difference, conduct radiation
Heat is the difference of the biquadratic of temperature, and heat transfer efficiency is far superior to the heat transfer and thermal convection that traditional sparking mode uses, rises
Temp effect is fairly good, and heat utilization ratio is very high, and the fluidized bed furnace heating duration of ignition can shorten 50% or so.
3, boiling operation being carried out according to temperature rise curve is intermittent, general 30min~60min carries out boiling operation once,
It avoids energy waste phenomenon that heat is carried away by the wind and the adverse effects such as the heating-up time is too long, and can achieve the temperature of matting layer
Degree is uniformly distributed, and meets the technology controlling and process index request of igniting.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, With reference to embodiment
The present invention is described in further detail.
A kind of roasting method relieving haperacidity fluidized bed furnace ignition method of the invention, specifically includes the following steps:
Step 1: according to live fluidized bed furnace specification, getting out sulfur-bearing 46% and the above troilite concentrate acid making system fluidized bed furnace
Raw material as fluidized bed furnace matting layer of furnace slag discharge or cobbings (below sulfur-bearing 0.002%)；
Step 2: before fluidized bed furnace plan igniting, ensureing each relevant device facilities are as good as new have the case where lighting a fire preliminary condition
Under, the matting layer raw material (the dry slag of the raw material of step 1) of 500mm~600mm thickness are laid with more than boiling furnace bottom blast cap；
Step 3: it carries out a Cold Boiling and rises operation, keep matting layer raw material arrangement more uniform, meanwhile, progress micro-boiling,
The boiling test of mine air quantity is thrown in middle boiling, so that it is subsequent when carrying out micro-boiling, middle boiling, throwing the boiling operation of mine air quantity, it is each to control
Parameter is more accurate, and fire door is sealed up after the completion of test；Wherein, micro-boiling refers to that 30% or so matting layer raw material reach boiling
State and total height of boiling are not higher than 100mm；Middle boiling refers to that 80% or so matting layer raw material reach fluidized state；It throws
The boiling of mine air quantity refers to that 100% matting layer raw material reach fluidized state and total height of boiling is in 700mm or so；
Step 4: it again ensures that and lights heating gun progress heat temperature raising in the case that related process, equipment etc. satisfy the requirements,
It is gradually heated up according to fluidized bed furnace heating curve, when burner hearth bottom matting layer upper air layer temperature reaches 500 DEG C or so,
Micro-boiling operation is carried out according to the control parameter that step 3 records；
Step 5: monitoring fixing layer (at matting layer about 250mm) temperature changing trend, in the feelings that temperature increase rate reduces
Under condition (general 30min~60min or so), the middle boiling for carrying out a 3~5min to matting layer is operated, and makes top high temperature warm sludge
It is primary that boiling rolling up and down is carried out with bottom low temperature slag；
Step 6: control burner hearth bottom air layer temperature is between 650 DEG C~850 DEG C, and furnace exit mouth temperature is at 700 DEG C
Left and right；
Step 7: continuing to be controlled according to the parameter request of step 6 on the basis of step 5, at this point, matting layer slag exists
Low temperature slag is heated between the upper and lower lower beginning quick centring of high temperature heat radiation effect；
Step 8: monitoring fixing layer (at matting layer about 250mm) temperature conditions, when reaching technique lowest reliable firing temperature
After (550 DEG C), the throwing mine air quantity for carrying out a 2~3min, which boils, to be operated, and guarantees matting layer uniformity of temperature profile, if throwing mine air quantity
After boiling operation, the temperature at matting layer 250mm is able to maintain constant or rises, and can stop heating gun completely, otherwise continue
Circulate operation is carried out according to step 5,6,7,8；
Step 9: stop heating gun completely, starts to feed intake production according to 80% or so of normal produce load, can after 15min
So that purification section is transferred to normal operating conditions, normal production is then transferred to according to fluidized bed furnace temperature conditions in due course.
Above nine step must carry out in sequence, be integrally formed the roasting method relieving haperacidity fluidized bed furnace ignition method of complete set,
It can guarantee that boiling furnace igniting once can success.
Roasting method relieving haperacidity fluidized bed furnace ignition method of the invention, substantially increases roasting method relieving haperacidity fluidized bed furnace and once puts igneous
Power, an ignition success rate avoid the generation of production accident caused by loss of ignition up to 100%；Substantially reduce roasting
The time of legal system acid fluidized bed furnace heating igniting, reduce energy consumption, and for the normal operation in advance of production system striven for compared with
The long time, greatly improve the performance of enterprises；There is no sulfurous gas and dust to generate in temperature-rise period, greatly reduces safety and environmental protection
Pressure；Can stop heating gun completely during feeding intake, and enable the reliable and secure work of the purification system of relieving haperacidity process, avoid
Destruction to conversion catalyst and the pollution to finished acid；The utilization rate of heat is effectively increased, and can realize the reliable point of low temperature
Fire, avoids caused by energy dissipation that the production cost increases；The matting layer raw material granularity of selection is moderate and highly uniform, dry,
Not only avoided dust, vapor generation and pollute environment and damage equipment, but also can ensure temperature when igniting to greatest extent
It spends uniform and stable, provides preferable guarantee for the normal production after feeding intake；When using intermittence boiling, shortening heating igniting
Between, improve ignition success rate the advantages that can substantially reduce labor intensity of workers, and the method small investment, it is easy to operate, control
Convenient, especially versatility is stronger；Remarkable in economical benefits, technology maturation, application prospect is boundless, can save every year for enterprise
For economic cost up to 500,000 yuan or more, market promotion prospect is very good.
The present invention succeeded at present 46% troilite concentrate relieving haperacidity production system of sulfur-bearing 120,000 tons/year of process units,
200000 tons/year of process units, 400,000 tons/year of process units obtain that practice is applied multiple times, securely and reliably, and small investment, control
Simplicity, especially versatility are stronger, and economic benefit is obvious, are highly suitable for promoting.
Simply to illustrate that technical concepts and features of the invention, its purpose is allows in the art above-described embodiment
Those of ordinary skill cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all
It is the equivalent changes or modifications that the essence of content according to the present invention is made, should be covered by the scope of protection of the present invention.
Claims (7)
1. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method, it is characterised in that: the following steps are included:
Step 1: the furnace slag discharge for selecting sulfur-bearing 46% and the above troilite concentrate acid making system fluidized bed furnace or cobbings are as boiling
The raw material of furnace matting layer；
Step 2: the matting layer raw material of 500mm~600mm thickness are laid with more than boiling furnace bottom blast cap；
Step 3: it carries out a Cold Boiling and rises operation, keep matting layer raw material arrangement more uniform, meanwhile, carry out micro-boiling, middle boiling
It rises, throw the boiling test of mine air quantity, so that subsequent when carrying out micro-boiling, middle boiling, throwing the boiling operation of mine air quantity, each control parameter
It is more accurate, fire door is sealed up after the completion of test；
Step 4: lighting heating gun and carry out heat temperature raising, gradually heated up according to fluidized bed furnace heating curve, when burner hearth bottom sky
When gas-bearing formation temperature reaches 500 DEG C or so, micro-boiling operation is carried out；
Step 5: the temperature changing trend at monitoring matting layer 250mm, in the case where temperature increase rate reduces, to matting layer
The middle boiling operation for carrying out a 3~5min makes top high temperature warm sludge and bottom low temperature slag carry out boiling rolling up and down primary；
Step 6: control burner hearth bottom air layer temperature is between 650 DEG C~850 DEG C, and furnace exit mouth temperature is at 700 DEG C or so；
Step 7: continuing to be controlled according to the parameter request of step 6 on the basis of step 5, at this point, matting layer slag is upper and lower
Low temperature slag is heated between the lower beginning quick centring of high temperature heat radiation effect；
Step 8: after the temperature at matting layer 250mm reaches technique lowest reliable firing temperature, carrying out the throwing of a 2~3min
The boiling operation of mine air quantity, guarantees matting layer uniformity of temperature profile, if after throwing the boiling operation of mine air quantity, the temperature at matting layer 250mm
Degree is able to maintain constant or rises, and into next step, otherwise continues to carry out circulate operation according to step 5-8；
Step 9: stop heating gun completely, starts to feed intake production according to 80% or so of normal produce load, can make after 15min only
Chemical industry section is transferred to normal operating conditions, is then transferred to normal production in due course according to fluidized bed furnace temperature conditions.
2. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method according to claim 1, it is characterised in that: described in step 1
Furnace slag discharge or cobbings sulfur content be 0.002% or less.
3. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method according to claim 1, it is characterised in that: described in step 3
Micro-boiling refer to that 30% or so matting layer raw material reach fluidized state and total height of boiling is not higher than 100mm.
4. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method according to claim 1, it is characterised in that: described in step 3
Middle boiling refers to that 80% or so matting layer raw material reach fluidized state.
5. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method according to claim 1, it is characterised in that: described in step 3
It throws the boiling of mine air quantity and refers to that 100% matting layer raw material reach fluidized state and total height of boiling is in 700mm or so.
6. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method according to claim 1, it is characterised in that: described in step 5
Temperature increase rate reduce time interval be 30min~60min.
7. a kind of roasting method relieving haperacidity fluidized bed furnace ignition method according to claim 1, it is characterised in that: described in step 8
Technique lowest reliable firing temperature be 550 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113003543A (en) * | 2021-04-26 | 2021-06-22 | 湖北鄂中生态工程股份有限公司 | Quick ignition method of fluidized bed furnace for preparing sulfuric acid |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113003543A (en) * | 2021-04-26 | 2021-06-22 | 湖北鄂中生态工程股份有限公司 | Quick ignition method of fluidized bed furnace for preparing sulfuric acid |
| CN113003543B (en) * | 2021-04-26 | 2023-09-26 | 湖北鄂中生态工程股份有限公司 | Rapid ignition method of fluidized bed furnace for preparing sulfuric acid |
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