CN204356213U - Utilize the equipment of residual heat from boiler fume mummification paper mill sludge - Google Patents
Utilize the equipment of residual heat from boiler fume mummification paper mill sludge Download PDFInfo
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- CN204356213U CN204356213U CN201420851288.9U CN201420851288U CN204356213U CN 204356213 U CN204356213 U CN 204356213U CN 201420851288 U CN201420851288 U CN 201420851288U CN 204356213 U CN204356213 U CN 204356213U
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Abstract
The utility model relates to a kind of solid-fuelled production unit based on industrial residue and waste material, be specifically related to a kind of equipment utilizing residual heat from boiler fume mummification paper mill sludge, comprise waste heat transfer passage and mud transfer passage, waste heat transfer passage comprises the boiler connected in turn, fly-ash separator I and induced draft fan I, induced draft fan I is connected to drying machine outlet respectively by flow valve, thionizer and vent stack, thionizer is connected with vent stack, mud transfer passage comprises the handling equipment and feeding machine that connect in turn, feeding machine is connected to drying machine entrance, drying machine entrance connects fly-ash separator II and induced draft fan II simultaneously in turn, induced draft fan II is connected to thionizer and vent stack respectively by flow valve.The utility model can not only the various mud of mummification effectively, and can keep more than 90% of the original calorific value of mud, and the mummification efficiency of mud can be made again to reach desirable degree, safety and environmental protection, cost-saving.
Description
Technical field
The utility model relates to a kind of solid-fuelled production unit based on industrial residue and waste material, is specifically related to a kind of equipment utilizing residual heat from boiler fume mummification paper mill sludge.
Background technology
The processing and manufacturing industry that paper industry is resource, energy consumption intensity is high, pollutent generation is large, environmental influence is serious.Paper-making process can produce a large amount of solid waste, and along with the expansion gradually of industry size, the environmental influence that these solid waste are brought also becomes increasingly conspicuous, and the various ecological problem of the consequent and social concern also highlight gradually.
The a large amount of waste sludge from paper mill produced in paper-making process and mud, paper industry utilizes waste paper often to produce 100 tons of finished paper, approximately produces sludge quantity 15m
3paper mill sludge thickening equipment is a lot, as belt filter press, flame filter press, butterfly revolve extrusion machine etc., the mass dryness fraction that often can reach is at 25-50% substantially, and some screw extrusion presss reach as high as mass dryness fraction about 60%, but the mud of 50-60% mass dryness fraction enters boiler, the problem of burning can only be solved, the effect that its heat plays is substantially equal to zero. because after the mud of 50-60% mass dryness fraction enters boiler combustion, the amount of its heat absorption and release is substantially identical, and processing and utilizing still difficulty is large.Current major part still only takes simple stacking and landfill.Along with the day by day formation of day by day the strengthening of government environmental protection supervision, the improving constantly of citizen's environmental consciousness, entrepreneur's social responsibility, exploration and the application of various green circulatory technology are very active, but in general, the green circulation economy chain of papermaking solid waste is not yet formed, and various application technology as the second resource many places are in the starting stage.
Utility model content
For the deficiency in solving the problems of the technologies described above, the purpose of this utility model is: provide a kind of equipment utilizing residual heat from boiler fume mummification paper mill sludge, can not only the various mud of mummification effectively, and more than 90% of the original calorific value of mud can be kept, the mummification efficiency of mud can be made again to reach desirable degree, safety and environmental protection, cost-saving.
The technical scheme that the utility model adopts for its technical problem of solution is:
The described equipment utilizing residual heat from boiler fume mummification paper mill sludge, comprise waste heat transfer passage and mud transfer passage, waste heat transfer passage comprises the boiler connected in turn, fly-ash separator I and induced draft fan I, induced draft fan I is connected to drying machine outlet respectively by flow valve, thionizer and vent stack, thionizer is connected with vent stack, mud transfer passage comprises the handling equipment and feeding machine that connect in turn, feeding machine is connected to drying machine entrance, drying machine entrance connects fly-ash separator II and induced draft fan II simultaneously in turn, induced draft fan II is connected to thionizer and vent stack respectively by flow valve.
When the utility model uses, the wet mud of water content≤75% sends into feeding machine through handling equipment, by feeding machine, material is fed drying machine uniformly, material is preheated in drying machine, nodularization and drying, after boiler smoke takes from boiler induced-draft fan, before thionizer, flue gas flow can be regulated by flow valve, unnecessary flue gas directly can pass through vent stack emptying, also can be introduced into after thionizer process again by vent stack emptying, time dry, flow of flue gas direction and the mud throughput direction in drying machine is contrary, maximize duration of contact and the contact area of flue gas and mud, make full use of fume afterheat to dry mud, flue gas in drying machine after heat exchange temperature be reduced to about 70 DEG C, moisture increases to close to saturated humidity, now, the newly-increased dust of a part also can enter into flue gas and form new tail gas, due to existing exhaust pipe being provided with desulfurization process, therefore induced draft fan I blast surplus is little, for ensureing that dry and desulfurization process uses simultaneously, induced draft fan II is set, with supplementary induced draft fan I loss of pressure head, tail gas carries out entering induced draft fan II after rough dusting through fly-ash separator II, then thionizer is entered by flow valve or through the direct emptying of vent stack.
Wherein, preferred version is:
Described fly-ash separator II is wet scrubber, wet scrubber is connected to circulating water pool by water circulating pump, for ensureing the dust removing effects of fly-ash separator II, adopt wet scrubber, coordinated for fly-ash separator II provides moisture needed for washing by circulating water pool and water circulating pump, the mud of discharging from wet scrubber directly enters circulating water pool and reclaims.
Slush pump is connected at the bottom of described circulating water pool pond, slush pump outlet is connected to handling equipment by press filtration device, throw out at the bottom of circulating water pool pond can be extracted by slush pump, then by obtaining stage casing mud after press filtration device press filtration, this mud can be sent into drying machine as wet mud and carry out drying and other treatment, press filtration enters circulating water pool after cutting off the water supply in obtaining and collecting and reuses, and press filtration device can adopt the crushed filter that market is now sold.
Described drying machine adopts rotary shelf drier, mud high humidity, there are certain viscosity, fibre-bearing, rotary shelf drier treatment capacity is large, possess granulation function, continuity is strong, simple to operate, and for the high humidity feature of material, drying machine adopts counter current drying, positive pressure operation.
Rotary shelf drier main part be one be covered with material delivering plate and special internals revolving drum, the material delivering plate in simplified is divided into lower curtate from feed end:
1) intake zone, simplified in order to ensure that material enters smoothly, this section is provided with spiral charging guide plate, promotes material and moves to simplified depths fast;
2) preheating zone, take counter current drying, tail gas outlet end is also feed end, this section of tail gas is owing to have passed through sufficient heat exchange, and its relative humidity is very large, substantially can not absorb moisture, but its temperature is still quite high, nearly 70 DEG C, can by wet feed preheating, for next step drying is got ready;
3) predrying district, this section material tentatively removes moisture, starts the thickness become, easily sticky barrel and flight, therefore this section flight is provided with and specially anti-coheres device, and the surface adhesion wet feed of antisticking device also increases the specific surface area of material simultaneously, improves heat transfer effect;
4) granulation zone, this stage material moisture reduces, and temperature and plasticity-have all possessed granulation conditions, and by the effect of special internals, material is at the rapid granulating in this region;
5) the constant speed heat exchange stage, this section material granulating, possessed mobility, moisture is in the steady-state evaporation phase, but intensity not yet reaches requirement, therefore controls its height of kicking up, reduces percentage of damage;
6) the rapid evaporation stage, this section material is shaping, good fluidity, tissue looseness, be beneficial to heat transfer and moisture diffusion, and this region hot blast temperature is high, moisture content is low, therefore this section adopts two curved flight, increase the ratio that material contacts with hot blast as much as possible, strengthen drying effect further;
7) change the problem brought for the processing condition that may occur in drying process, as boiler smoke temperature variation, raw material humidity change etc., drying machine drive unit adopts frequency control motor, ensures that drum speed is adjustable at 2 ~ 4.5r/min.
Described handling equipment adopts scraper conveyor, scraper conveyor rugged construction, is convenient to install, and is suitable for the material carrying weight larger, meets Production requirement.
Described feeding machine adopts screw feeder, and screw feeder transport efficiency is high, safe and reliable, and structure is simple, the little and good looking appearance of complete function, good airproof performance, noise.
Described flow valve adopts electric brake plate valve, and electric brake plate valve is simple to operate, easy to maintenance, saves manpower.
Compared with prior art, the utility model has following beneficial effect:
1, the recycling of the discarded energy, make use of the heat energy of discharging in boiler smoke, turns waste into wealth, solve to essence the energy consumption problem of sludge drying.
2, improve heat-conductive characteristic, improve drying efficiency, because the heat-conduction coefficient of mud is less, will dewatered sludge effectively, adopt reverse-flow air intake, flue gas and mud have sufficient contact area and duration of contact, maximally utilise smoke heat energy, drying machine has perfect granulation and lifting function, after mud group enters drying machine, promptly can be separated into small-particle, by the uniform arbitrary space to desiccation apparatus of raising material unit, the material curtain that flue gas and mud granule are formed has sufficient surface-area directly to contact, uniform high-efficiency ground heat exchange, simultaneously, because drying machine has enough length, ask when flue gas has abundant in drying machine and carry out heat exchange with mud, make the moisture fast vaporizing in mud, and taken away by flue gas at once, the mummification power in drying process is made to be in optimum regime all the time, thus improve mummification speed, this is that sludge drying process all cannot match in excellence or beauty both at home and abroad at present.
3, low dynamics energy consumption, because drying machine has larger cross section, the circulation of heat smoke is fabulous, and all without special windage section in whole drying machine, so unit sludge process power consumption is minimum in going together both at home and abroad at present, day-to-day operation cost is also of the same trade minimum.
4, finished product characteristic, owing to there being good one-tenth graininess after sludge drying, homogeneous sized by finished product mud, the particle of uniform drying; Meanwhile, because flue gas mummification belongs to low temperature mummification, remain organic high heating value combustibles in mud, conveying is convenient, can not produce the secondary pollutions such as dust again.
The safety coefficient of 5, producing is high, due to mud, before mummification, oneself completes granulation, dust in drying process is few, absolute little meeting reaches the concentration of detonating of dust, meanwhile, the oxygen level in flue gas is lower, and during mummification, the actual temperature of mud is relatively low, so, utilize the technique of flue tail gas dewatered sludge to have absolute security.
6, environmental protection, owing to adopting low temperature seal drying process, a small amount of waste gas and useless dirt is only carried in flue gas, after adopting sack cleaner purification, air is entered through chimney, case history in the past detects through local environmental administration and proves, meets the emission standard of country completely, does not have sewage and useless quarrel to generate in production process.
Accompanying drawing explanation
Fig. 1 the utility model structured flowchart.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described further:
As shown in Figure 1, the described equipment utilizing residual heat from boiler fume mummification paper mill sludge, comprise waste heat transfer passage and mud transfer passage, waste heat transfer passage comprises the boiler connected in turn, fly-ash separator I and induced draft fan I, induced draft fan I is connected to drying machine outlet respectively by flow valve, thionizer and vent stack, thionizer is connected with vent stack, mud transfer passage comprises the handling equipment and feeding machine that connect in turn, feeding machine is connected to drying machine entrance, drying machine entrance connects fly-ash separator II and induced draft fan II simultaneously in turn, induced draft fan II is connected to thionizer and vent stack respectively by flow valve.
Wherein, described fly-ash separator II is wet scrubber, wet scrubber is connected to circulating water pool by water circulating pump, for ensureing the dust removing effects of fly-ash separator II, adopt wet scrubber, coordinated for fly-ash separator II provides moisture needed for washing by circulating water pool and water circulating pump, the mud of discharging from wet scrubber directly enters circulating water pool and reclaims; Slush pump is connected at the bottom of described circulating water pool pond, slush pump outlet is connected to handling equipment by press filtration device, throw out at the bottom of circulating water pool pond can be extracted by slush pump, then by obtaining stage casing mud after press filtration device press filtration, this mud can be sent into drying machine as wet mud and carry out drying and other treatment, press filtration enters circulating water pool after cutting off the water supply in obtaining and collecting and reuses, and press filtration device can adopt the crushed filter that market is now sold; Drying machine adopts rotary shelf drier, mud high humidity, there are certain viscosity, fibre-bearing, rotary shelf drier treatment capacity is large, possess granulation function, continuity is strong, simple to operate, and for the high humidity feature of material, drying machine adopts counter current drying, positive pressure operation; Handling equipment adopts scraper conveyor, scraper conveyor rugged construction, is convenient to install, and is suitable for the material carrying weight larger, meets Production requirement; Feeding machine adopts screw feeder, and screw feeder transport efficiency is high, safe and reliable, and structure is simple, the little and good looking appearance of complete function, good airproof performance, noise; Flow valve adopts electric brake plate valve, and electric brake plate valve is simple to operate, easy to maintenance, saves manpower.
When the utility model uses, the wet mud of water content≤75% sends into feeding machine through handling equipment, by feeding machine, material is fed drying machine uniformly, material is preheated in drying machine, nodularization and drying, after boiler smoke takes from boiler induced-draft fan, before thionizer, flue gas flow can be regulated by flow valve, unnecessary flue gas directly can pass through vent stack emptying, also can be introduced into after thionizer process again by vent stack emptying, time dry, flow of flue gas direction and the mud throughput direction in drying machine is contrary, maximize duration of contact and the contact area of flue gas and mud, make full use of fume afterheat to dry mud, flue gas in drying machine after heat exchange temperature be reduced to about 70 DEG C, moisture increases to close to saturated humidity, now, the newly-increased dust of a part also can enter into flue gas and form new tail gas, due to existing exhaust pipe being provided with desulfurization process, therefore induced draft fan I blast surplus is little, for ensureing that dry and desulfurization process uses simultaneously, induced draft fan II is set, with supplementary induced draft fan I loss of pressure head, tail gas carries out entering induced draft fan II after rough dusting through fly-ash separator II, then thionizer is entered by flow valve or through the direct emptying of vent stack.
Rotary shelf drier main part be one be covered with material delivering plate and special internals revolving drum, the material delivering plate in simplified is divided into lower curtate from feed end:
1) intake zone, simplified in order to ensure that material enters smoothly, this section is provided with spiral charging guide plate, promotes material and moves to simplified depths fast;
2) preheating zone, take counter current drying, tail gas outlet end is also feed end, this section of tail gas is owing to have passed through sufficient heat exchange, and its relative humidity is very large, substantially can not absorb moisture, but its temperature is still quite high, nearly 70 DEG C, can by wet feed preheating, for next step drying is got ready;
3) predrying district, this section material tentatively removes moisture, starts the thickness become, easily sticky barrel and flight, therefore this section flight is provided with and specially anti-coheres device, and the surface adhesion wet feed of antisticking device also increases the specific surface area of material simultaneously, improves heat transfer effect;
4) granulation zone, this stage material moisture reduces, and temperature and plasticity-have all possessed granulation conditions, and by the effect of special internals, material is at the rapid granulating in this region;
5) the constant speed heat exchange stage, this section material granulating, possessed mobility, moisture is in the steady-state evaporation phase, but intensity not yet reaches requirement, therefore controls its height of kicking up, reduces percentage of damage;
6) the rapid evaporation stage, this section material is shaping, good fluidity, tissue looseness, be beneficial to heat transfer and moisture diffusion, and this region hot blast temperature is high, moisture content is low, therefore this section adopts two curved flight, increase the ratio that material contacts with hot blast as much as possible, strengthen drying effect further;
7) change the problem brought for the processing condition that may occur in drying process, as boiler smoke temperature variation, raw material humidity change etc., drying machine drive unit adopts frequency control motor, ensures that drum speed is adjustable at 2 ~ 4.5r/min.
The utility model has following beneficial effect:
1, the recycling of the discarded energy, make use of the heat energy of discharging in boiler smoke, turns waste into wealth, solve to essence the energy consumption problem of sludge drying.
2, improve heat-conductive characteristic, improve drying efficiency, because the heat-conduction coefficient of mud is less, will dewatered sludge effectively, adopt reverse-flow air intake, flue gas and mud have sufficient contact area and duration of contact, maximally utilise smoke heat energy, drying machine has perfect granulation and lifting function, after mud group enters drying machine, promptly can be separated into small-particle, by the uniform arbitrary space to desiccation apparatus of raising material unit, the material curtain that flue gas and mud granule are formed has sufficient surface-area directly to contact, uniform high-efficiency ground heat exchange, simultaneously, because drying machine has enough length, ask when flue gas has abundant in drying machine and carry out heat exchange with mud, make the moisture fast vaporizing in mud, and taken away by flue gas at once, the mummification power in drying process is made to be in optimum regime all the time, thus improve mummification speed, this is that sludge drying process all cannot match in excellence or beauty both at home and abroad at present.
3, low dynamics energy consumption, because drying machine has larger cross section, the circulation of heat smoke is fabulous, and all without special windage section in whole drying machine, so unit sludge process power consumption is minimum in going together both at home and abroad at present, day-to-day operation cost is also of the same trade minimum.
4, finished product characteristic, owing to there being good one-tenth graininess after sludge drying, homogeneous sized by finished product mud, the particle of uniform drying; Meanwhile, because flue gas mummification belongs to low temperature mummification, remain organic high heating value combustibles in mud, conveying is convenient, can not produce the secondary pollutions such as dust again.
The safety coefficient of 5, producing is high, due to mud, before mummification, oneself completes granulation, dust in drying process is few, absolute little meeting reaches the concentration of detonating of dust, meanwhile, the oxygen level in flue gas is lower, and during mummification, the actual temperature of mud is relatively low, so, utilize the technique of flue tail gas dewatered sludge to have absolute security.
6, environmental protection, owing to adopting low temperature seal drying process, a small amount of waste gas and useless dirt is only carried in flue gas, after adopting sack cleaner purification, air is entered through chimney, case history in the past detects through local environmental administration and proves, meets the emission standard of country completely, does not have sewage and useless quarrel to generate in production process.
Claims (7)
1. one kind utilizes the equipment of residual heat from boiler fume mummification paper mill sludge, it is characterized in that, comprise waste heat transfer passage and mud transfer passage, waste heat transfer passage comprises the boiler connected in turn, fly-ash separator I and induced draft fan I, induced draft fan I is connected to drying machine outlet respectively by flow valve, thionizer and vent stack, thionizer is connected with vent stack, mud transfer passage comprises the handling equipment and feeding machine that connect in turn, feeding machine is connected to drying machine entrance, drying machine entrance connects fly-ash separator II and induced draft fan II simultaneously in turn, induced draft fan II is connected to thionizer and vent stack respectively by flow valve.
2. the equipment utilizing residual heat from boiler fume mummification paper mill sludge according to claim 1, is characterized in that, described fly-ash separator II is wet scrubber, and wet scrubber is connected to circulating water pool by water circulating pump.
3. the equipment utilizing residual heat from boiler fume mummification paper mill sludge according to claim 2, is characterized in that, connects slush pump at the bottom of described circulating water pool pond, and slush pump outlet is connected to handling equipment by press filtration device.
4. the equipment utilizing residual heat from boiler fume mummification paper mill sludge according to claim 1, is characterized in that, described drying machine adopts rotary shelf drier.
5. the equipment utilizing residual heat from boiler fume mummification paper mill sludge according to claim 1 or 3, is characterized in that, described handling equipment adopts scraper conveyor.
6. the equipment utilizing residual heat from boiler fume mummification paper mill sludge according to claim 1, is characterized in that, described feeding machine adopts screw feeder.
7. the equipment utilizing residual heat from boiler fume mummification paper mill sludge according to claim 1, is characterized in that, described flow valve adopts electric brake plate valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420851288.9U CN204356213U (en) | 2014-12-29 | 2014-12-29 | Utilize the equipment of residual heat from boiler fume mummification paper mill sludge |
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| CN201420851288.9U CN204356213U (en) | 2014-12-29 | 2014-12-29 | Utilize the equipment of residual heat from boiler fume mummification paper mill sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502877A (en) * | 2015-11-30 | 2016-04-20 | 林斌炎 | Integrated treatment system for coal-fired flue gas and sludge |
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2014
- 2014-12-29 CN CN201420851288.9U patent/CN204356213U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105502877A (en) * | 2015-11-30 | 2016-04-20 | 林斌炎 | Integrated treatment system for coal-fired flue gas and sludge |
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