A kind of process units of viscose base activated carbon fiber and energy-conserving and environment-protective method
Technical field
The present invention relates to a kind of production technology of carbon fiber, be specifically related to a kind of process units and energy-conserving and environment-protective method of viscose base activated carbon fiber, belong to carbon fiber production technology field.
Background technology
At present, activated carbon fiber (ACF) is on the basis of Carbon Fiber Technology and activated carbon combine with technique, the third generation activated carbon products after powdery and granular activated charcoal of research and development.This product is a kind of high absorption, high value, high benefit, high-tech environment-friendly products, by one of the high-end environment-friendly materials of generally acknowledging in the world.This product has been widely used in multiple industries such as environmental protection, chemical industry, pharmacy, medical treatment, health, military affairs, protection, fire prevention.At present, ACF is mainly used in the aspects such as solvent recovery, purification of water quality, treating vehicle exhaust, gas defence utensil, medical protection, purification of air, fire proofing material, ultracapacitor, treating vehicle exhaust.
But produce in activated carbon fiber process and can produce a large amount of high-temperature tail gas, containing residual C, CO2, PO in this tail gas
4 3-deng material, high-temperature tail gas is directly entered air by current most of enterprise, and this high-temperature tail gas is not recycled, and causes seriously energy waste and environmental pollution, also reduce Business Economic Benefit simultaneously, do not meet China's saving, low-carbon (LC), recycling economy, eco-friendly industrial policy.
Summary of the invention
For above-mentioned prior art Problems existing, the invention provides a kind of process units and energy-conserving and environment-protective method of viscose base activated carbon fiber, energy-saving and cost-reducing effect can be played preferably.
To achieve these goals, the process units of a kind of viscose base activated carbon fiber that the present invention adopts, comprises catalysis system, dewatering system, carbonization/activation system and energy conserving system;
Described catalysis system comprises reactor, product pump, puts felt machine, send felt machine one, catalysis pond, Water Extraction Machinery, pendulum felt machine one, wet felt car and clarified water pump, described clarified water pump is connected with reactor and to water filling in reactor, described reactor is connected with catalysis pond by product pump, described put felt machine and send felt machine one to coordinate control felt-cloth and enter catalysis pond, described Water Extraction Machinery and pendulum felt machine one control felt-cloth and enter wet felt car from catalysis pond;
Described dewatering system comprises dewatering station, air-heater, send felt machine two, dryer, pendulum felt machine two and dry felt car, described dewatering station will wet felt-cloth dehydration in felt car, coordinated by air-heater and dryer and dry wet felt-cloth, described send felt machine two that wet felt-cloth is delivered to drying machine drying after, deliver to pendulum felt machine again, the felt-cloth after oven dry is sent in dry felt car by described pendulum felt machine;
Described carbonization/activation system comprises to be sent felt machine three, carbide furnace, go out felt machine, send felt machine four, activation furnace, send felt machine five, finished car, steam oven, felt-cloth in dry felt car is sent into carbonization in carbide furnace by the described felt machine three that send, described go out felt machine and send felt machine four to coordinate felt-cloth after carbonization sent in activation furnace and activate, described steam oven passes into mist respectively in carbide furnace, activation furnace, described in send felt machine five will activate after felt-cloth send into finished car;
Described energy conserving system comprises afterheat steam stove, hot-blast stove, air blast, air-introduced machine, absorption tower, circulatory pool, circulating pump and clarified water pump, described clarified water pump is connected with afterheat steam stove and to water filling in afterheat steam stove, described carbide furnace is connected with afterheat steam stove respectively by pipeline with activation furnace, described afterheat steam stove is connected with hot-blast stove, described air blast is connected with hot-blast stove, and described hot-blast stove is connected with dewatering station, dryer respectively by pipeline.
As the improvement of scheme, also comprise environment friendly system, described environment friendly system comprises afterheat steam stove, hot-blast stove, air blast, air-introduced machine, absorption tower, circulatory pool, circulating pump and clarified water pump;
Described clarified water pump is connected with circulatory pool, and described circulatory pool is connected with absorption tower by circulating pump, and described hot-blast stove is connected with absorption tower by air-introduced machine, and described afterheat steam stove is connected with reactor by pipeline.
Present invention also offers a kind of energy-conserving and environment-protective technique using the process units of viscose base activated carbon fiber described in above-mentioned any one, comprise catalytic step, dehydration, carbonization/activation step and energy saving step;
Described catalytic step, first adds water in reactor, then is added to the water by BY composite catalyst and stirs, and makes BY complex catalyst solution; BY complex catalyst solution is added in catalysis pond through product pump, then viscose glue base fibrofelt is put into BY complex catalyst solution floods, remove after part water through Water Extraction Machinery and obtain wet catalysis fibrofelt, for subsequent use;
Described dehydration, first sends the hot blast that hot-blast stove produces into dewatering station, then catalysis wet fiber mat is sent into dewatering station, after removing most of free water, then remove residual water through dryer, can obtain butt Modified catalytic fibrofelt, for subsequent use;
Described carbonization/activation step, passes into steam in carbide furnace, after segmentation temperature adjustment, is sent in carbide furnace by butt Modified catalytic fibrofelt, can obtain high carbon fiber felt through carbonization; High carbon fiber felt is sent into activation furnace, and in activation furnace, pass into steam, after segmentation temperature adjustment, high carbon fiber felt obtains active carbon fiber felt through high-temperature activation, then carries out finished product packing;
Described energy saving step, starts clarified water pump and adds water to afterheat steam stove, enter in afterheat steam stove, can produce high-temperature steam by the high-temperature tail gas of discharging in carbide furnace or activation furnace; High-temperature steam sends into carbide furnace for the production of high carbon fiber felt; High-temperature steam is sent in activation furnace, for the production of active carbon fiber felt.
As the improvement of scheme, high temperature tail vapour after utilizing in described energy saving step, enter from afterheat steam stove in hot-blast stove, in hot-blast stove, normal temperature air is blown into by air blast, high-temperature tail gas in normal temperature air and hot-blast stove carries out heat exchange, normal temperature air is heated up as hot blast, then hot blast is sent into respectively in dewatering station and dryer, for the production of butt Modified catalytic fibrofelt.
As the improvement of scheme, this technique also comprises environmental protection step;
Described environmental protection step, quantitative clean water and the mixing of quantitative alkaline solution are injected circulatory pool, send in absorption tower by circulating pump by mixing buck in circulatory pool, tail gas after utilizing through hot-blast stove secondary is sent in absorption tower, acidic materials in tail gas and circulation buck carry out neutralization reaction, gas after deacidification is discharged from tower top, and the sediment produced after neutralization is neutral products, regular cinder-discharge.This slag is nontoxic, can make fertilizer utilization.
As the improvement of scheme, described catalytic step, specifically comprises:
A () starts clarified water pump, join in reactor by quantitative clean water;
B () starts the electric stirring on reactor, add in reactor, abundant stirring and dissolving by BY composite catalyst, obtained BY complex catalyst solution; BY composite catalyst is in soluble sulphate (as ammonium sulfate, potassium sulfate etc.), phosphoric acid, phosphate (as potassium phosphate, sodium phosphate ammonium etc.) and halogen (as ammonium chloride, zinc chloride etc.) at least two kinds composite, and the mass fraction of BY complex catalyst solution is 8-12%;
C () starts product pump, squeezed into by BY complex catalyst solution in catalysis pond;
D () startup is put felt machine (3) and send felt machine one, sent in catalysis pond by viscose glue base fibrofelt, felt is fully flooded in BY complex catalyst solution;
E () starts Water Extraction Machinery, after impregnated viscose glue base fibrofelt dehydration, pendulum felt machine one of making a gift to someone, sends into this wet felt in wet felt car (8), obtained wet catalysis fibrofelt, for subsequent use.
As the improvement of scheme, described dehydration, specifically comprises:
A () starts the transmitting device of dewatering station, sent into by the wet catalysis fibrofelt in wet felt car in dewatering station;
B () starts the hot blast control valve in hot-blast stove, sent into by hot blast in dewatering station, catalysis wet fiber mat is removed most of free water, obtain modification wet catalysis fibrofelt;
C () starts air-heater, the hot blast of self-heating wind furnace is sent in dryer in the future;
D felt machine two is sent in () startup, the modification wet fiber mat containing residual moisture sent in dryer, remove residual moisture;
E () starts pendulum felt machine two, sent in dry felt car by the fibrofelt after drying, obtain butt modified fibre felt, for subsequent use.
As the improvement of scheme, described carbonization/activation step, specifically comprises:
A () starts the electric calorifie installation on carbide furnace, the electric heater on electric calorifie installation is distributed in 6 warm areas, is arranged on by the temperature value of each warm area in PLC robot control system(RCS), by the temperature of each warm area of this Systematical control;
B () starts steam oven, in carbide furnace, pass into steam;
C felt machine three is sent in () startup, sent in carbide furnace by butt modified fibre felt, obtain high carbon fiber felt through carbonization;
D () starts the electric calorifie installation on activation furnace, the electric heater on electric calorifie installation is distributed in 7 warm areas, is arranged on by the temperature value of each warm area in PLC robot control system(RCS), by the temperature of each warm area of this Systematical control;
E control valve that () starts on steam oven passes into steam in activation furnace;
F () starts felt machine and send felt machine four, sent in activation furnace by high carbon fiber felt, high carbon fiber felt high-temperature activation can obtain active carbon fiber felt;
G () starts and send felt machine five, sent into by active carbon fiber felt in finished car, carried out by the active carbon fiber felt in finished car arranging, detect, measure, pack the special storehouse of rear feeding finished product and store.
As the improvement of scheme, described energy saving step, specifically comprises:
A () starts clarified water pump, open the water intaking valve on afterheat steam stove, water is injected afterheat steam stove;
B () opens the gas regulating valve on carbide furnace or activation furnace, make the high-temperature gas produced in stove enter in afterheat steam stove;
C () enters high-temperature tail gas in afterheat steam stove and normal-temperature water carries out heat exchange, normal-temperature water heated up and changes high-temperature vapor into;
D () opens the high-temperature steam outlet control valve of afterheat steam stove, high-temperature steam is sent in carbide furnace, for the production of high carbon fiber felt; High-temperature steam is sent in activation furnace, for the production of activated carbon fiber.
By the catalysis system in production equipment, common felt-cloth is made catalysis felt blanket, by dewatering system, butt modification felt blanket is obtained to catalysis felt blanket dewatered drying again, by carbonization/activation system, active carbon fiber felt is obtained to butt modification felt blanket reaction treatment again, wherein, energy conserving system is also utilized to be made full use of by the waste heat in production process.
The invention has the beneficial effects as follows:
1. once utilize by adopting afterheat steam stove can carry out waste heat, per hour produce 0.4 ton, pressure is the steam of 0.5MPa, for carbide furnace, can produce high carbon fiber felt; For activation furnace, activated carbon fiber can be produced; For reactor, BY complex catalyst solution can be heated.
2. by adopting hot-blast stove, secondary waste heat utilization being carried out to high-temperature tail gas, the hot blast producing about 1 ten thousand stere 120 DEG C per hour, for dewatering station and dryer, butt modified carbon fiber felt can be produced.
3. can replace a coal fired boiler and a coal-fired hot-blast stove, reduce direct investment about 460,000 yuan, reduce workman 6 people, product integrated cost per ton reduces about 9500 yuan;
4. after adopting this step, decrease the dependence to coal, reduce the discharge of CO2, SO3 and flue dust, decrease the pollution to environment;
5. this technological project can form significant economic benefit, environmental benefit and social benefit, meets China's saving, low-carbon (LC), recycle, eco-friendly industrial policy.
6. not yet there are a whole set of process units of the viscose-based active carbon fiber that design same with the present invention and energy-conserving and environment-protective method in this area, can be that the same industry is carried out large-scale production, increases economic efficiency, economized on resources, protection of the environment, provides engineering example.
Accompanying drawing explanation
Fig. 1 is process units of the present invention and process flow diagram;
In figure: 1, reactor, 2, product pump, 3, put felt machine, 4, send felt machine one, 5, catalysis pond, 6, Water Extraction Machinery, 7, pendulum felt machine one, 8, wet felt car, 9, dewatering station, 10, air-heater, 11, send felt machine two, 12, dryer, 13, pendulum felt machine two, 14, dry felt car, 15, send felt machine three, 16, carbide furnace, 17, go out felt machine, 18, send felt machine four, 19, activation furnace, 20, send felt machine five, 21, finished car, 22, steam oven, 23, afterheat steam stove, 24, hot-blast stove, 25, air blast, 26, air-introduced machine, 27, absorption tower, 28, circulatory pool, 29, circulating pump, 30, clarified water pump.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below by accompanying drawing and embodiment, the present invention is further elaborated.But should be appreciated that, specific embodiment described herein, only in order to explain the present invention, is not limited to scope of the present invention.
A production equipment for activated carbon fiber, comprises catalysis system, dewatering system, carbonization/activation system and energy conserving system;
Described catalysis system comprises reactor 1, product pump 2, puts felt machine 3, send felt machine 1, catalysis pond 5, Water Extraction Machinery 6, pendulum felt machine 1, wet felt car 8 and clarified water pump 30, described clarified water pump 30 is connected with reactor 1 and to water filling in reactor 1, described reactor 1 is connected with catalysis pond 5 by product pump 2, described put felt machine 3 and send felt machine 1 to coordinate control felt-cloth and enter catalysis pond 5, described Water Extraction Machinery 6 and pendulum felt machine 1 control felt-cloth and enter wet felt car 8 from catalysis pond 5;
Described dewatering system comprises dewatering station 9, air-heater 10, send felt machine 2 11, dryer 12, pendulum felt machine 2 13 and dry felt car 14, described dewatering station 9 will wet felt-cloth dehydration in felt car 8, coordinated by air-heater 10 and dryer 12 and dry wet felt-cloth, described send felt machine 2 11 that wet felt-cloth is delivered to drying machine drying after, deliver to pendulum felt machine 13 again, the felt-cloth after oven dry is sent in dry felt car 14 by described pendulum felt machine 13;
Described carbonization/activation system comprises to be sent felt machine 3 15, carbide furnace 16, go out felt machine 17, send felt machine 4 18, activation furnace 19, send felt machine 5 20, finished car 21, steam oven 22, felt-cloth in dry felt car 14 is sent into carbonization in carbide furnace 16 by the described felt machine 3 15 that send, described go out felt machine 17 and send felt machine 4 18 to coordinate felt-cloth after carbonization is sent into activation in activation furnace 19, described steam oven 22 passes into mist respectively in carbide furnace 16, activation furnace 19, described in send felt machine 5 20 will activate after felt-cloth send into finished car 21;
Described energy conserving system comprises afterheat steam stove 23, hot-blast stove 24, air blast 25, air-introduced machine 26, absorption tower 27, circulatory pool 28, circulating pump 29 and clarified water pump 30, described clarified water pump 30 is connected with afterheat steam stove 23 and to water filling in afterheat steam stove 23, described carbide furnace 16 is connected with afterheat steam stove 23 respectively by pipeline with activation furnace 19, described afterheat steam stove 23 is connected with hot-blast stove 24, described air blast 25 is connected with hot-blast stove 24, and described hot-blast stove 24 is connected with dewatering station 9, dryer 12 respectively by pipeline.
As the improvement of embodiment, also comprise environment friendly system, described environment friendly system comprises afterheat steam stove 23, hot-blast stove 24, air blast 25, air-introduced machine 26, absorption tower 27, circulatory pool 28, circulating pump 29 and clarified water pump 30;
Described clarified water pump 30 is connected with circulatory pool 28, and described circulatory pool 28 is connected with absorption tower 27 by circulating pump 29, and described hot-blast stove 24 is connected with absorption tower 27 by air-introduced machine 26, and described afterheat steam stove 23 is connected with reactor 1 by pipeline.
As shown in Figure 1, a kind of energy-conserving and environment-protective technique of producing activated carbon fiber, comprise catalytic step, described catalytic step, specifically comprises:
A () starts clarified water pump 30, joined in reactor 1 by 1000kg water, heated by water with recovered steam, controls water temperature about 35 DEG C;
B () starts the electric stirring on reactor 1,120kgBY composite catalyst thread is added in reactor 1, abundant stirring and dissolving, obtained BY complex catalyst solution, BY composite catalyst be phosphoric acid, potassium phosphate, sodium phosphate ammonium, ammonium sulfate, zinc chloride composite, the mass fraction of BY complex catalyst solution is 10.7%;
C () starts product pump 2, divided by BY complex catalyst solution and squeeze into for five times in catalysis pond 5, deposits BY composite catalyst 5600kg altogether in catalysis pond;
D () startup is put felt machine 3 and send felt machine 1, sent in catalysis pond 5 by viscose glue base fibrofelt, viscose glue base fibrofelt is fully flooded at BY complex catalyst solution, is about 30 minutes during dipping;
E () starts Water Extraction Machinery 6 and pendulum felt machine 1, sent into by wet adhesive base fibrofelt in wet felt car 8, obtained wet catalysis fibrofelt, this felt water retention rate about 2.5%, for subsequent use.
Also comprise dehydration, described dehydration, specifically comprises:
A () starts the transmitting device of dewatering station 9, sent into by the wet catalysis fibrofelt in wet adhesive base fibrofelt car 8 in dewatering station 9;
B () starts the hot blast control valve in hot-blast stove 24, sent into by hot blast in dewatering station 9, catalysis wet fiber mat can remove most of free moisture, obtains wet modified fibre felt, this felt water retention rate about 0.6%;
C () starts air-heater 10, the hot blast of self-heating wind furnace 24 is sent in dryer 12 in the future;
D felt machine 2 11 is sent in () startup, sent in dryer 12 by the wet modified fibre felt containing residual moisture, remove residual moisture;
E () starts pendulum felt machine 2 13, sent in dry felt car 14 by the modified fibre felt after drying, obtain butt modified fibre felt, this felt water retention rate about 0.1%, for subsequent use.
Comprise carbonization-activation step, described carbonization/activation step, specifically comprises:
A () starts the electric calorifie installation on carbide furnace 16, controlling carbide furnace 16 temperature is 150-250 DEG C, electric heater on electric calorifie installation is distributed in 6 warm areas, the temperature value of each warm area is arranged in PLC robot control system(RCS), is respectively by the temperature of each warm area of this Systematical control: a district 150-180 DEG C, two district 180-250 DEG C, three district's constant temperature 250 DEG C, four district's constant temperature 250 DEG C, five district 250-180 DEG C, six district 180-100 DEG C;
B () starts steam oven 22, after making to produce steam in this stove, steam pressure is 0.5MPa, starts control valve and pass into steam in carbide furnace 16;
C felt machine 3 15 is sent in () startup, by butt modified fibre felt by sending in carbide furnace 16, obtain high carbon fiber felt through carbonization;
D () starts the electric calorifie installation on activation furnace 19, controlling carbide furnace 16 temperature is 700-1200 DEG C, electric heater on electric calorifie installation is distributed in 7 warm areas, the temperature value of each warm area is arranged in PLC robot control system(RCS), is respectively by the temperature of each warm area of this Systematical control: a district 700-1000 DEG C, two district 1000-1200 DEG C, three district's constant temperature 1200 DEG C, four district's constant temperature 1200 DEG C, five district's constant temperature 1200 DEG C, six district 1200-900 DEG C, seven district 900-600 DEG C, eight district 600-300 DEG C, nine district 300-100 DEG C;
E control valve that () starts on steam oven 22 passes into steam in activation furnace 19;
F () starts felt machine 17 and send felt machine 4 18, high carbon fiber felt is pressed certain speed and send in activation furnace 19, control each process conditions in stove, high carbon fiber felt can obtain active carbon fiber felt through high-temperature activation;
Meanwhile, a large amount of high-temperature tail gas is produced in activation furnace 19, temperature about 380 DEG C; High-temperature tail gas enters in afterheat steam stove 23, heat exchange is carried out with the normal-temperature water in this stove, produce 0.5MPa water vapour, switch the relevant steam valve on afterheat steam stove 23 and steam oven 22, can for carbide furnace 16, activation furnace 19 normally from the steam that afterheat steam stove 23 produces.Now steam oven 22 can stop for steam.
G () starts and send felt machine 5 20, sent into by active carbon fiber felt in finished car 21, carried out by the active carbon fiber felt in finished car 21 arranging, detect, measure, pack the special storehouse of rear feeding finished product and store.
This technique also comprises energy saving step and environmental protection step, and wherein energy saving step comprises waste heat and once utilizes and utilize with waste heat secondary.
Waste heat once utilizes step as follows:
A () starts clarified water pump 30, open the water intaking valve of afterheat steam stove 23, water is injected afterheat steam stove 23;
B () opens the tail gas controlling valve on carbide furnace 16 or activation furnace 19, make the high-temperature tail gas produced in stove enter in afterheat steam stove 23;
C () enters high-temperature tail gas in afterheat steam stove 23 and water carries out heat exchange, normal-temperature water heated up and changes high-temperature vapor into;
D () opens the steam (vapor) outlet control valve of afterheat steam stove 23, and open the intake valve on carbide furnace 16 or activation furnace 19 simultaneously, and high-temperature steam is sent in carbide furnace, for the production of high carbon fiber felt; High-temperature steam is sent in activation furnace, for the production of activated carbon fiber.
Described waste heat once utilizes, per hour produce 0.4 ton, pressure is the steam of 0.5MPa, can for reactor 1, carbide furnace 16, activation furnace 19.A coal fired boiler and auxiliary facility can be replaced like this, reduce investment about 220,000 yuan, reduce workman 6 people, cost-saving about 5900 yuan of product per ton; Because not re-using coal, both saving the energy, having turn avoid the pollution to environment.
Waste heat secondary utilizes step as follows:
A () high-temperature tail gas after a UTILIZATION OF VESIDUAL HEAT IN, enters in hot-blast stove 24 from afterheat steam stove 23;
B () starts air blast 25, sent in hot-blast stove 24 by normal temperature air, carry out heat exchange with the high-temperature tail gas entered in hot-blast stove 24 by control valve, is heated up by normal temperature air as hot-air;
C () opens the air bleeding valve on hot-blast stove 24, sent into respectively by the hot-air of generation in dewatering station 9 and dryer 12, is used for producing butt Modified catalytic fibrofelt.
Described waste heat secondary utilizes, and by the high-temperature flue gas that afterheat steam stove 23 is discharged, then enters hot-blast stove 24, carry out the heat exchange with normal temperature air, by the 120 DEG C of hot blasts generated, send into dewatering station 9 and dryer 12 respectively, to wet change fibrofelt carry out dewatered drying after for subsequent use.A coal-fired hot-blast stove can be replaced, investment about 240,000 yuan can be reduced, economize on electricity 120KW per hour, cost-saving about 3600 yuan of product per ton.Save the energy, add economic benefit.
Described environmental protection step, specifically comprises:
A () starts clarified water pump 30, quantitative clear water and quantitative alkaline solution are injected circulatory pool 28;
B () starts circulating pump 29, by the buck (main component is Ca(OH) in circulatory pool 28
2,mass fraction is 8%-10%) send in absorption tower 27;
C () starts air-introduced machine 26, open intake valve, and the low temperature exhaust gas after hot-blast stove utilizes for 24 2 times is sent in absorption tower 27;
D () enters tail gas in absorption tower 27 and buck carries out physical reaction in the packing layer of absorption tower 27;
E the acidic materials in () tail gas and circulation buck carry out neutralization reaction, the gas after deacidification is discharged from tower top, does not pollute the environment; The sediment produced after neutralization is neutral products, regular cinder-discharge.
By setting up environmental protection step, main containing carbon residue C, CO in the tail gas of twice UTILIZATION OF VESIDUAL HEAT IN
2, PO
4 3-, tail gas enters bottom absorption tower, and the limewash with spraying from tower top containing Ca (HO) 2, carries out physical reaction in inner-tower filling material, and the solid content of formation regularly gets rid of sediment in sedimentation basin, weak base supernatant reusable edible.Every day can produce sediment and be about 100kg, can be used as fuel in sediment containing char particle; The CaCO generated
3, Ca
3(PO
4)
2, these materials are nontoxic, can be used as Fertilizer application, can not cause environmental pollution.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement or improvement etc., all should be included within protection scope of the present invention.