CN105757708A - Air heating device used for alkali recovery furnace - Google Patents

Air heating device used for alkali recovery furnace Download PDF

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Publication number
CN105757708A
CN105757708A CN201610283260.3A CN201610283260A CN105757708A CN 105757708 A CN105757708 A CN 105757708A CN 201610283260 A CN201610283260 A CN 201610283260A CN 105757708 A CN105757708 A CN 105757708A
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pressure
low pressure
air
connects
pipe
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CN105757708B (en
Inventor
康仙陵
张劲松
杨晓臻
段启坤
杨能生
刘北平
肖波
汤玉林
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CHINA LIGHT INDUSTRY WUHAN DESIGN ENGINEERING Co Ltd
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CHINA LIGHT INDUSTRY WUHAN DESIGN ENGINEERING Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L15/00—Heating of air supplied for combustion
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/12—Combustion of pulp liquors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
    • F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure- reducing chambers, e.g. in accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F22D11/02—Arrangements of feed-water pumps
    • F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2209/00—Specific waste
    • F23G2209/10—Liquid waste
    • F23G2209/101—Waste liquor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

The invention discloses an air heating device used for an alkali recovery furnace. An air outlet of an air blower is connected with an air pipe; the other end of the air pipe is connected with a cold air inlet of an air heater; a temperature sensor is arranged on the air pipe; a hot air outlet, a medium-pressure condensed water outlet, a low-pressure steam inlet and a low-pressure condensed water outlet are further formed in the air heater; the hot air outlet is connected with the air pipe; a pressure transmitter and a flow transmitter are arranged on the air pipe; a medium-pressure steam pipe is connected with a medium-pressure steam inlet of the air heater; a regulating valve is arranged on the medium-pressure steam pipe; a valve opening regulation execution mechanism is arranged on the regulating valve; a medium-pressure condensed water pipe is connected with the medium-pressure condensed water outlet of the air heater and a medium-pressure condensed water inlet of a medium-pressure condensed water collection groove; and low-pressure steam pipes are connected. The air heating device is simple in structure and low in running energy consumption; an alkali recovery production operation environment is effectively improved by water, the influence of hot steam on the environment is reduced, and the corrosion degree of water vapor to stress components of a factory building structure is reduced.

Description

A kind of air heating apparatus for alkali recovery furnace
Technical field
The present invention relates to paper industry pulping waste liquor combustion method and reclaim alkali technical field, be more particularly to the air heating apparatus of a kind of alkali recovery furnace, be suitable for alkali recovery boiler air feed system.
Background technology
Paper mill pulping waste liquor (title black liquor) is by after being concentrated into 55%～75%, spray into alkali recovery furnace inner suspension to dry, burn, organic compound combustion in black liquor produces steam, produces fused mass molten and dissolve, be transported to next process and reclaim industrial chemicals alkali after inorganic matter burning.Owing to the dry solid content calorific value of black liquor is typically in 2900～4700kcal/kg, more coal-fired (mark coal: 7000kcal/kg) is low, the air blast of alkali recovery furnace needs to carry out air heating (to～150 DEG C) and improves the ignition temperature of burner hearth, thus improving combustion conditions.
Native system wastes situation for air heating system waste heat, is provided with a kind of air heating apparatus: carry out flash distillation after the condensate water collecting produced after steam is added hot-air, produces secondary saturated vapor (0.49MPa, 158 DEG C), for preheating of air.After preheated air produce condensed water collect further after secondary flash, saturated vapor (the 0.20MPa produced, 133.5 DEG C) can be used for deaerator storage tank heating boiler feed water, the condensation at low temperature water (133.5 DEG C) after secondary flash feeds water for supplement boiler.
Flash distillation refers to a kind of phase transition process of water, i.e. saturation water under certain pressure and temperature or unsaturated water, when pressure drops to the saturation pressure at certain temperature, will enter saturation region and begin to boil off, and along with the decline of pressure, its vaporization improves constantly.Saturated vapor is reduced to condensation water after releasing the latent heat of vaporization.Condensing water to be discharged from gas utilization unit owing to losing high-efficiency heating effect, also taken out of by sensible heat simultaneously, this partial heat accounts for the 20%～30% of steam total amount of heat.Therefore, recycle condensation water and become the energy saving way that heating system is important.
Up to now, mainly there is following several boiler air feed heat form both at home and abroad.
1, low-pressure steam heating, the direct form of export of condensed water
The alkali collection engineering of domestic ton paper plant generally adopts 0.4MPa saturated vapor heating boiler air feed, and the condensed water of generation is directly discharged into trench.Its major defect has:
1. the temperature of 0.4MPa saturated vapor is relatively low, is 151 DEG C, adds hot-air effect poor；
2. the condensed water with pressure (151 DEG C) discharged takes away a large amount of waste heat, causes thermal waste and water resource utility model；
3. while in the discharge process of condensed water, owing to pressure becomes atmospheric pressure, flash distillation rate reaches maximum, can produce bigger steam, steel-structure factory building is produced corrosion, affects operating environment.
2, middle pressure steam heating, recycling condensing water
The alkali collection engineering of the above paper plant of domestic ton generally adopts 1.27MPa saturated vapor heating boiler air feed, sends into deoxygenation water tank, for boiler feedwater after the condensation water collection of hydrophobic generation.
Major defect has:
1. the condensate temperature with pressure produced due to 1.27MPa saturated vapor is 194 DEG C, higher than boiler feed temperature (104 DEG C or 130 DEG C), can reduce pressure at deoxygenation water tank (normal pressure) and produce hot vapour (i.e. indirect steam) is dispersed in external environment, cause thermal loss, affect operating environment.
2. the condensation water quantity adding hot-air generation is relatively big, consumes more electric energy during conveying；
3. the condensed water conveying of higher temperature, it is easy to cause the cavitation phenomenons of delivery pump, reduces pump performance, or make pump cannot pumped (conveying) medium, cause the damage of pump time serious, high temperature easily makes pipe fitting be easily damaged simultaneously.
The cavitation phenomenons of pump: when centrifugal pump setting height(from bottom) improves, will cause that in pump, pressure reduces, and in pump, pressure minimum point is usually located near impeller blade import after a while a bit.When pressure is down to the saturated vapor pressure being transferred at liquid now temperature herein, to seethe with excitement, the steam bubble generated outwards is being circulated from entrance disorder of internal organs with liquid, sharply condense because pressure increases rapidly again, liquid can be made to rush at bubble center with very big speed from surrounding, producing the impact that frequency is significantly high, instantaneous pressure is very big, this phenomenon is called cavitation phenomenons.
The harm of cavitation phenomenons: 1, noise and vibration can be produced.2, the corrosion failure of flow passage components.When pump works for a long time under cavitation conditions, the flow passage components of pump can suffer corrosion failure in some place.Producing high frequency (600～25000HZ) intense impact when one is due to bubble-break, pressure, up to 49Mpa, causes metal surface mechanical denuding occur；Another kind releases heat when being due to vaporization, and has thermoelectric cell effect to produce hydrolysis, and the oxygen of generation makes burning, and chemical attack occurs.3, pump performance declines.During pump cavitation, the energy exchange in impeller is interfered and destroys, and the performance in external characteristics is Q-H curve, and Q-P, Q-η curve declines, and the liquid stream in pump can be made time serious to interrupt, it is impossible to work.
Summary of the invention
It is an object of the invention to there are provided a kind of air heating apparatus for alkali recovery boiler, this device adds more steam consumption and the waste heat waste that hot-air brings and condensing hot air furnace collection Utilizing question when efficiently solving alkali recovery furnace air feed.This device can effectively add hot-air, reclaims the consumption condensing waste heat in water, saving steam；High-temperature steam is relatively big due to the temperature difference with environment, and thermal losses is relatively large, so, utilize the low-pressure steam that part bleeder steam produces, it is possible to reduce thermal losses；This device can also reduce the exhaust temperature and discharge capacity that condense water, reduces condensed water in high temperature and reclaims the conveying equipment cavitation hazard and pipe fitting spillage of material that bring, reaches energy efficiency, the effect of ecological, environmental protective.This device overall structure is simple, and operation energy consumption is low, and water discharge capacity is few, operates automatization；Effectively improve alkali collection production exercise environment, it will be apparent that reduce the impact on environment of the hot vapour；Alleviate the steam extent of corrosion to mill construction primary structure member.
In order to realize above-mentioned task, the present invention by the following technical solutions:
A kind of air heating apparatus for alkali recovery furnace, it includes: aerator, air heat exchanger, middle pressure hot well, low pressure hot well, frequency conversion condensate pump, airduct, middle pressure steam pipe, middle pressure condensate pipe, low pressure condensate pipe, low pressure steam pipe, condensation at low temperature water pipe, regulate valve, temperature sensor, pressure transmitter, flow transducer, flow transmitter, PLC controls device, PLC controls device and is made up of programmable logic controller (PLC) and host computer, containing flow indication/control unit, pressure display unit, temperature display unit, pressure display unit, temperature shows/control unit, liquid level shows/controls/alarm unit composition.It is characterized in that: (being located at) ground (or flooring) position fixed by aerator, blower outlet connects the first airduct, first airduct other end connects the first cold wind import of air heater, and the first airduct is provided with first flow transmitter, the second pressure transmitter, three-temperature sensor.Air heater is additionally provided with the second hot-blast outlet, the 3rd middle pressure steam import, pressure condensation-water drain, the 5th low pressure steam inlet, the 6th low pressure condensation-water drain in the 4th；Second hot-blast outlet connects the second airduct, is allocated into stove after hot blast is delivered to alkali recovery furnace air loop duct, for combustion-supporting.Second airduct is provided with the 4th pressure transmitter, the 5th flow transmitter.Middle pressure steam pipe connects the 3rd middle pressure steam import of air heater, and middle pressure steam pipe is provided with the first adjustment valve, and first regulates valve is provided with controlling opening of valve actuator；Middle pressure condensate pipe connect air heater the 4th in pressure condensation-water drain and middle pressure hot well second in pressure condensed water import；First low pressure condensate pipe connects the 6th low pressure condensation-water drain of air heater and the 4th low pressure condensation water inlet of low pressure cold Condensed water collection.First low pressure steam pipe connects the second low pressure steam pipe, and the second low pressure steam pipe is connected to air heater the 5th low pressure steam inlet, and the indirect steam that middle pressure hot well produces is used for air preheat；The 3rd low pressure condensation-water drain and low pressure hot well the 3rd low pressure condensation water inlet of hot well pressed by second low pressure condensate pipe in connecting, second low pressure condensate pipe is provided with the second adjustment valve, second regulates valve is provided with controlling opening of valve actuator (for RVQ647 V type ball valve, outsourcing.The actuator of valve is connected on the valve rod of valve, the channel sized in control valve, control fluid by measure).
3rd low pressure steam pipe connects the first low pressure steam pipe outlet of low pressure hot well, low-pressure steam is delivered to deaerating type of cycles and is used for the heating of boiler feedwater.3rd condensation at low temperature water pipe connects low pressure hot well the second low pressure condensation-water drain and frequency conversion condensate pump import, and the outlet of frequency conversion condensate pump connects condensation at low temperature water pipe, and condensation at low temperature water is delivered to the feedwater of condensation water tank supplement boiler.Frequency conversion condensate pump low exit temperature condensate pipe is provided with the 3rd adjustment valve, and the 3rd regulates valve is provided with controlling opening of valve actuator, is additionally provided with the 8th flow transducer.
PLC controls device and is made up of programmable logic controller (PLC) and host computer, containing flow indication/control unit, pressure display unit, temperature display unit, pressure display unit, temperature show/control unit, liquid level show/control/alarm unit.
Described first flow shows/control unit connects first flow transmitter and aerator the first converter, second pressure display unit connects the second pressure transmitter, 3rd temperature display unit connects three-temperature sensor, 4th pressure display unit connects the 4th pressure transmitter, 5th temperature shows/control unit connects first on the 5th temperature sensor and middle pressure steam pipe and regulates valve, 6th liquid level shows/controls/alarm unit connects the 6th fluid level transmitter and second and regulates valve, 7th liquid level shows/controls/alarm unit connects the 7th fluid level transmitter and the 3rd and regulates valve, eight flow indications/control unit connects the second converter of the 8th flow transducer and frequency conversion condensate pump.
The first converter on aerator shows with the first frequency conversion motor, first flow respectively/control unit is connected；5th temperature sensor shows with the second airduct, the 5th temperature respectively/control unit is connected；6th fluid level transmitter shows with the second low pressure condensate pipe, the 6th liquid level/controls respectively/alarm unit is connected；7th fluid level transmitter shows with the 3rd low pressure condensate pipe, the 7th liquid level/controls respectively/alarm unit is connected；The second converter on frequency conversion condensate pump is connected respectively at the second frequency conversion motor and eight flow indications/control unit.
Each ingredient function and acting as:
1., the acting as of aerator: aerator sucks air, and outlet connects the first airduct, the air of the certain pressure that needs of alkali recovery furnace and flow is sent into heating in air heater, it is ensured that it is combustion-supporting that hot blast has certain flow velocity and flow to enter alkali recovery furnace.
2., the acting as of air heater: the normal temperature air sent here by aerator is heated to 150 DEG C, by the second airduct that air heater outlet connects, hot-air is introduced alkali recovery furnace combustion-supporting.Middle pressure steam pipe connects the 3rd middle pressure steam import of air heater, becomes condensed water after the middle pressure saturated vapor of 1.27MPa (194 DEG C) and air heat exchange.4th condensation-water drain of air heater presses condensate pipe in connecting, and pressure condensed water in 194 DEG C (158 DEG C) is delivered to middle pressure hot well.The second low pressure steam pipe containing 0.49MPa (158 DEG C) low-pressure saturated steam (power station steam turbine is bled) connects the low pressure steam inlet of air heater, for preheated air, by air heating to about 100 DEG C, after low-pressure steam and air heat exchange, become low pressure condensed water.6th low pressure condensation-water drain of air heater connects the first low pressure condensate pipe, and the middle pressure condensed waters of 158 DEG C are guided to low pressure hot well.
3., the acting as of middle pressure hot well: the middle pressure condensed water of 194 DEG C in middle pressure hot well due to the decline of pressure, flash off 0.49MPa, the indirect steam (low-pressure saturated steam) of 158 DEG C, the first low pressure steam pipe is connected through the first low-pressure steam outlet, (supplementing steam in pipe is the 0.49MPa that bleeder steam produces to receive the second low pressure steam pipe again, 158 DEG C of saturated vapors), it is connected to air heater, for preheating of air.Low pressure condensed water is introduced low pressure hot well by the second low pressure condensate pipe that the 3rd condensed water discharge outlet connects.
When the heat setting under certain pressure bears water or boiler water is by blood pressure lowering, part water can double evaporation-cooling, obtained steam is flash-off steam, and namely flash-off steam betides the water (saturation temperature when water temperature is higher than low pressure) of high pressure when becoming low pressure.
4., the acting as of low pressure hot well: the low pressure condensed water of 158 DEG C in low pressure hot well due to the decline of pressure, flash off 0.2MPa, 133.5 DEG C low pressure flash vapour, the 3rd low pressure steam pipe connected through the second low-pressure steam outlet removes deaerator storage tank, heats for boiler feedwater.3rd low pressure condensate pipe connects the second condensed water discharge outlet and frequency conversion condensate pump.Mesohigh boiler replenishing water temperature is generally 130 DEG C, and the condensed water after twice flash distillation has reached the requirement of boiler feedwater on the one hand, on the other hand, the conveying of the condensed water of lower temperature, reduce the Probability of condensate pump cavitation.
5., the acting as of frequency conversion condensate pump: keep the liquid level of low pressure hot well, and the condensation at low temperature water (133.5 DEG C) after twice flash distillation is sent to deoxygenation water tank feeds water for supplement boiler.
6., PLC control device 16 by first flow show/control unit 16-1, the second pressure display unit 16-2, the 3rd temperature display unit 16-3, the 4th pressure display unit 16-4, the 5th temperature show/control unit 16-5, the 6th liquid level show/control/alarm unit 16-6, the 7th liquid level show/control/alarm unit 16-7, eight flow indications/control unit 16-8 form.It act as:
First flow shows/control unit 16-1, and the detection signal of first flow transmitter 15-1 feeds back to PLC through cable, and after PLC computing, output control signal reaches aerator the first converter 1-2 through cable, and flow parameter shows at host computer；Regulate aerator the first frequency conversion motor 1-1 rotating speed by the first converter 1-2, control the blow rate required of aerator.
Second pressure display unit 16-2, the detection signal of the second pressure transmitter 15-2 feeds back to PLC, Display Drum fan outlet blast through cable；
The detection signal of the 3rd temperature display unit 16-3, three-temperature sensor 15-3 feeds back to PLC, Display Drum fan outlet pathogenic wind-warm through cable；
4th pressure display unit 16-4, the detection signal of the 4th pressure transmitter 15-4 feeds back to PLC through cable, shows air heater outlet blast.
5th temperature shows/control unit 16-5, and the detection signal of the 5th temperature sensor 15-5 feeds back to PLC through cable, and after PLC computing, output control signal reaches first on middle pressure steam pipe through cable and regulates valve 17, and parameter shows at host computer；By regulating the aperture of the first adjustment valve, control middle pressure steam quantity delivered, play air heating and temperature control effect.
6th liquid level shows/controls/alarm unit 16-6, the detection signal of the 6th fluid level transmitter 15-6 feeds back to PLC through cable, after PLC computing, output control signal reaches the second adjustment valve 18 through cable, and parameter shows at host computer, exceedes a high position and low alarm, by reconciling the second control valve opening, control the liquid level of high pressure hot well 3, it is ensured that low pressure hot well pressure, block gas and enter low pressure hot well.
7th liquid level shows/controls/alarm unit 16-7, the detection signal of the 7th fluid level transmitter 15-7 feeds back to PLC through cable, after PLC computing, output control signal reaches the 3rd adjustment valve through cable, and parameter shows at host computer, exceedes a high position and low alarm, by reconciling the 3rd control valve opening, control the liquid level of low pressure hot well 4, it is ensured that high pressure hot well pressure, block gas and enter the pump housing.
Eight flow indications/control unit 16-1, the detection signal of the 8th flow transducer 15-1 feeds back to PLC through cable, and after PLC computing, output control signal reaches the second converter 5-2 of frequency conversion condensate pump 5 through cable, and flow parameter shows at host computer；Regulated the rotating speed of the second frequency conversion motor 5-1 by the second converter 5-2, play the control action of conveying capacity.
By adding hot blast rate: 75000m3/ h*3 platform (30 DEG C) meter (reclaims the air capacity of the required heating of alkali recovery furnace of 1000 ton day waste liquid solid contents), pathogenic wind-warm after heating is 150 DEG C, using actual internal area is that 2.445 air heaters add hot-air, and two kinds of heats estimations are as follows:
A, use 1.27MPa completely, 194 DEG C of saturated vapors heating (heat transfer coefficient is by K=58.9kcal/m2.hr. DEG C):
1) 194 DEG C of full steam consumptions: 6.02t/h*3 platform；
2) 194 DEG C of saturated condensation water quantities are produced: 6.02t/h*3 platform.
B, this device is used to carry out secondary flash condensing hot air furnace waste heat, preheated air (preheated air heat transfer coefficient, by K=55.52kcal/m2.hr. DEG C, adds hot-air heat transfer coefficient by K=57.66kcal/m2.hr. DEG C):
1) 1.27MPa, 194 DEG C of full steam annual consumptions: 2.32t/h*3 platform；
2) 0.49MPa, 158 DEG C of full steam: 0.17t/h*3 platform are produced；
Supplement 0.49MPa, 158 DEG C of full steam: 3.31t/h*3 platform (source: bleeder steam)；
3) 0.2MPa, 133.5 DEG C of full steam: 0.28t/h*3 platform are produced；
4) 133.5 DEG C of condensed waters are produced: 5.35t/h*3 platform.
C) conclusion:
1) 1.27MPa, 194 DEG C of full steam: 6.02t/h*3 platform-2.32t/h*3 platform=3.70t/h are saved
2) condensation water quantity is reduced: (6.02t-5.35t) * 3=0.67t/h*3=2.01t/h；
3) (indirect steam) heat energy is reclaimed:
0.17t/h*665.95kcal/kg+0.28t/h*650.83kcal/kg) * 3 * 1000kg/t=885178.05kcal/h
Signature coal (mark coal: 7000kcal/kg meter):
885178.05kcal/kg ÷ 7000kcal/kg=126.45t/h.
This device is on the one hand, it is possible to adds hot-air, reclaim the consumption condensing waste heat in water, saving steam, simultaneously, it is possible to reduces the exhaust temperature and discharge capacity that condense water, alleviate the steam corrosion to mill construction primary structure member, reach energy efficiency, the effect of ecological, environmental protective.
The present invention compared with prior art, has the following advantages and effect:
1) this device can effectively heat the air required for alkali recovery furnace；Waste heat in high efficiente callback steam condensate, reduces condensation water discharge capacity, decreases the power consumption of conveying equipment, energy efficiency.
2) utilize this device effectively to reduce the exhaust temperature of steam condensate (SC), reduce condensation water high temperature and reclaim the operating cost and equipment and spillage of material brought.
3) decrease distributing of steam, improve operation operating mode, be effectively reduced the steam corrosion to workshop steel structure.
4) part bleeder steam is utilized to reduce thermal losses to air preheat.High-temperature steam is relatively big due to the temperature difference with environment, and thermal losses is relatively large, so, utilize low-pressure steam, it is possible to reduce thermal losses.Under specified generating yield and thermic load, steam turbine is bled more many, and the thermo-power station thermal efficiency is more high, thus improving energy utilization rate, saves fire coal, it is achieved energy-saving and emission-reduction.
5) automaticity of the present invention is high, can record in time, regulate and the liquid level of early warning hot well, prevent gas from altering logical, make to add the effectively hydrophobic (steam condensate in eliminating firing equipment or jet chimney of condensed water that hot-air produces, and not leak-off steam), it is ensured that the temperature and pressure of flash-off steam；Can record, regulate air quantity and the temperature of air heating in time；By regulating conveying condensate pump motor speed, it is ensured that the safe handling of pump, effectively reduce the probability that cavitation phenomenons occurs.
The present invention is applicable to system and solves the heating of alkali recovery furnace air, waste heat recovery and condensed water elimination problem.By the secondary flash of condensed water, reclaim the waste heat in the condensed water that heated air produces；Reduce exhaust temperature and the discharge capacity of condensed water；Effectively reduce conveying capacity and the cavitation phenomenons Probability of delivery pump.This device overall structure is simple, can run continuously for a long time, and operation energy consumption is low, operates automatization；It is effectively improved alkali collection production exercise environment, hence it is evident that reduce the soda pop discharge impact on environment；Alleviate the soda pop corrosion to steel plant structure primary structure member, reclaim field at papermaking wastewater and there is good application prospect.
By adding hot blast rate: 75000m3/ h*3 platform (30 DEG C) (reclaims the air capacity of the required heating of alkali recovery furnace of 1000 ton day waste liquid solid contents), pathogenic wind-warm after heating is 150 DEG C of meters, if using actual internal area is that 2.445 air heaters add hot-air, heats is estimated: 1) save 1.27MPa, 194 DEG C of full steam 3.70t/h；2) condensed water conveying capacity: 2.01t/h is reduced；3) (indirect steam) heat energy: 885178.05kcal/h is reclaimed, signature coal (mark coal: 7000kcal/kg meter) 126.45t/h.
Accompanying drawing explanation
Fig. 1 is alkali recovery boiler air heating apparatus schematic diagram.
Wherein: 1 aerator (non-standard equipment, air quantity: 75000m3/ h (30 DEG C), H=4500Pa, market is purchased), 1-1 the first frequency conversion motor (power: 132KW, 1450rpm, 380V, market is purchased), 1-2 the first converter (non-standard equipment, 132KW electric drilling match converter, market is purchased), 1-3 blower outlet；2 air heat exchangers (non-standard equipment, temperature rise: 20～150 DEG C of steam: 1.27MPa, air heat exchanger (low-temperature heat exchange area: 940m2, high temperature heat exchange area: 780m2.Market is purchased) constitute: 2-1 the first cold wind import, 2-2 the second hot-blast outlet, 2-3 the 3rd middle pressure steam import, 2-4 the 4th presses condensation-water drain, 2-5 the 5th low pressure steam inlet, 2-6 the 6th low pressure condensation-water drain；Press hot well, 3-1 the first low-pressure steam outlet in 3,3-2 first presses condensed water import, 3-3 the first condensed water discharge outlet；4 low pressure hot wells, 4-1 the second low-pressure steam outlet, 4-2 the second condensed water discharge outlet, 4-3 the first low pressure condensation water inlet, 4-4 the second low pressure condensation water inlet；5 frequency conversion condensate pump (flow: 40m3/h, Yang Cheng: 30m, maximum operating temperature: 130 DEG C, market is purchased), 5-1 the second frequency conversion motor (power: 7.5KW, rotating speed: 2900r/min, 380V), 5-2 the second converter (non-standard equipment, 7.5KW electric drilling match converter are purchased on market)；6 first airducts；7 middle pressure steam pipes；8 second airducts；Condensate pipe is pressed in 9；10 first low pressure steam pipes；11 first low pressure condensate pipes；12 second low pressure condensate pipes；13 the 3rd low pressure condensate pipes；14 condensation at low temperature water pipes；null17 first regulate valve (common)，18 second regulate valve (common)，19 the 3rd regulate valve (common)，20 second low pressure steam pipes，21 the 3rd low pressure steam pipes，15-1 first flow transmitter (differential pressure transmitter，Market is purchased)，15-2 the second pressure transmitter (teletransmission pressure transmitter,Model such as WT3000CG2A22A1BB4DF，Market is purchased)，15-3 three-temperature sensor (platinum resistance thermometer sensor,,Model: WZPK-240 purchases on market)，15-4 the 4th pressure transmitter (teletransmission pressure transmitter,Model such as WT3000CG2A22A1BB4DF，Market is purchased)，15-5 the 5th temperature sensor (platinum resistance thermometer sensor,,Model: WZPK-240，Market is purchased)，15-6 the 6th fluid level transmitter (differential pressure transmitter，Model such as WT3000CD2A22A1BB4DF，Market is purchased)；15-7 the 7th fluid level transmitter (differential pressure transmitter, model such as WT3000CD2A22A1BB4DF, market is purchased)；15-8 the 8th flow transducer (electromagnet flow meter sensor is purchased on market)；16 PLC control device (containing rack and module, rack model: YR-BF04, market is purchased), including: 16-1 first flow shows/control unit (modular unit, market is purchased), 16-2 the second pressure display unit (modular unit is purchased on market)；16-3 the 3rd temperature display unit (modular unit, model: WZPK-240 purchases on market), 16-4 the 4th pressure display unit (modular unit is purchased on market)；16-5 the 5th temperature shows/control unit (modular unit, market is purchased), 16-6 the 6th liquid level shows/controls/alarm unit (modular unit, market is purchased), 16-7 the 7th liquid level shows/controls/alarm unit (modular unit is purchased on market), 16-8 eight flow indications/control unit (modular unit, electromagnet flow meter sensor, market is purchased).
Note: this appliance arrangement model changes with production yields.The unit type of this offer is: by air capacity 75000m3The supporting air heating apparatus of/h air blast carries out type selecting.
" module ", also known as component, the built-in CPU{ central processing unit (CPU, CentralProcessingUnit) of module, is one piece of integrated circuit }.Module is for completing one section of program needed for a certain function or subprogram, being able to individually name and be independently completed the set (i.e. the aggregation of program code and data structure) of the program statement of certain function.
Non-standard equipment refers to that equipment is not standardized, does not produce in batches, it does not have unified model.After equipment manufacturer receives order, need to require to carry out personalized Drawing Design, make (those of ordinary skill in the art all can prepare) according to user.For non-standard universal design, personalized drawing (those of ordinary skill in the art all can prepare) need to be carried out.
Detailed description of the invention
Embodiment 1:
nullAccording to Fig. 1，A kind of alkali recovery furnace air heating apparatus，It includes: aerator 1、Air heat exchanger 2、Middle pressure hot well 3、Low pressure hot well 4、Frequency conversion condensate pump 5、First airduct 6、Middle pressure steam pipe 7、Second airduct 8、Middle pressure condensate pipe 9、Low pressure steam pipe 10、First low pressure condensate pipe 11、Second low pressure condensate pipe 12、3rd low pressure condensate pipe 13、Condensation at low temperature water pipe 14、First regulates valve 17、Second regulates valve 18、3rd regulates valve 19、Second middle pressure steam pipe 20、3rd low pressure steam pipe 21、First flow transmitter 15-1、Second pressure transmitter 15-2、Three-temperature sensor 15-3、4th pressure transmitter 15-4、5th temperature sensor 15-5、6th fluid level transmitter 15-6、7th fluid level transmitter 15-7、8th flow transducer 15-8、PLC controls device 16.Its annexation is: aerator 1 fixed bottom boundary (or flooring) position, blower outlet 1-3 connects the first airduct 6, first airduct 6 other end connects the first cold wind import 2-1 of air heater 2, and the first airduct 6 is provided with first flow transmitter 15-1, the second pressure transmitter 15-2, three-temperature sensor 15-3.Air heater 2 is additionally provided with the second hot-blast outlet 2-2, the 3rd middle pressure steam import 2-3, pressure condensation-water drain 2-4, the 5th low pressure steam inlet 2-5, the 6th low pressure condensation-water drain 2-6 in the 4th, second hot-blast outlet 2-2 connects the second airduct 6, it is allocated into stove, for combustion-supporting after hot blast is delivered to alkali recovery furnace air loop duct.The second airduct 8 that second hot-blast outlet 2-2 connects is provided with the 4th pressure transmitter, the 5th flow transmitter.Middle pressure steam pipe 7 connects the 3rd middle pressure steam import 2-3 of air heater, and middle pressure steam pipe 7 is provided with the first adjustment valve 17, and first regulates valve is provided with controlling opening of valve actuator (for RVQ647 V type ball valve, outsourcing)；Middle pressure condensate pipe 9 connect air heater 2 the 4th in pressure condensation-water drain 2-4 and middle pressure hot well 3 first in pressure condensed water import 3-2；First low pressure condensed water 11 connects the 6th low pressure condensation-water drain 2-6 of air heater 2 and the 4th low pressure condensation water inlet 4-4 of low pressure hot well 4.First low pressure steam pipe 10 connects the second low pressure steam pipe 20, and the second low pressure steam pipe 20 is connected to the 5th low pressure steam inlet 2-5 of air heater, and the indirect steam that middle pressure hot well 3 produces is used for air preheat.
The low pressure condensation-water drain 3-3 of hot well 3 and the 3rd low pressure condensation water inlet 4-3 of low pressure hot well 4 pressed by second low pressure condensate pipe 12 in connecting, second low pressure condensate pipe 12 is provided with the second adjustment valve 18, and second regulates valve 18 is provided with controlling opening of valve actuator；3rd low pressure steam pipe 21 connects the low pressure steam pipe outlet 4-1 of low pressure hot well 4, low-pressure steam is delivered to deaerating type of cycles and is used for the heating of boiler feedwater.
3rd condensation at low temperature water pipe 13 connects low pressure hot well 4 and frequency conversion condensate pump 5 import, and frequency conversion condensate pump 5 outlet connects condensation at low temperature water pipe 14, and condensation at low temperature water is delivered to the feedwater of condensation water tank supplement boiler.Frequency conversion condensate pump 5 low exit temperature condensate pipe 14 is provided with the 3rd adjustment valve 19, and the 3rd regulates valve is provided with controlling opening of valve actuator, is additionally provided with the 8th flow transducer 15-8.
PLC controls device 16 and shows/control unit 16-1 containing first flow, second pressure display unit 16-2,3rd temperature display unit 16-3,4th pressure display unit 16-4,5th temperature shows/control unit 16-5,6th liquid level shows/controls/alarm unit 16-6, and the 7th liquid level shows/control/alarm unit 16-7, eight flow indications/control unit 16-8.Its special annexation: the first converter 2-1 shows with the first frequency conversion motor 1-1 and first flow respectively/control unit 16-1 is connected；Second pressure display unit 16-2 connects the second pressure transmitter 15-2,3rd temperature display unit 16-3 connects three-temperature sensor 15-3,4th pressure display unit 16-4 connects the 4th pressure transmitter 15-4, and the 5th temperature show/and control unit 16-5 is connected with the first adjustment valve 17 on the 5th temperature sensor 15-5 and middle pressure steam pipe respectively；6th liquid level shows/controls/alarm unit 16-6 regulates valve 18 with the 6th fluid level transmitter 15-6 and second respectively and is connected；7th liquid level shows/controls/alarm unit 16-7 regulates valve 19 with the 7th fluid level transmitter 15-7 and the 3rd respectively and is connected；Second converter 5-2 of frequency conversion condensate pump 5 is connected with the second frequency conversion motor 5-1 and eight flow indications/control unit 16-8 of frequency conversion condensate pump respectively.
The detailed description that PLC controls device 16 is as follows: PLC is controlled device 16 and by programmable logic controller (PLC) and host computer flow, liquid level, temperature, pressure, electrical conductivity and motor speed is monitored or regulates and controls, as shown in phantom in Figure 1.Particularly as follows: first flow shows/control unit 16-1, detect aerator 1 by first flow transmitter 15-1 and export the air mass flow in the first airduct 6, signal is fed back to PLC by cable, the first converter 1-2 of aerator 1 is output control signals to after PLC computing, by regulating the rotating speed of the first frequency conversion motor 1-1, regulate blower outlet air flow.Second pressure display unit 16-2, detects the air pressure of air heater 2 import the first airduct 6 by the second pressure transmitter 15-2, and signal is fed back to PLC by cable, exports signal after PLC computing, and force value shows at host computer.3rd temperature display unit 16-3, detects the air themperature of air heater 2 import the first airduct 6 by three-temperature sensor 15-3, and signal is fed back to PLC by cable, exports signal after PLC computing, and temperature value shows at host computer.4th pressure display unit 16-4, detects air heater 2 by the second pressure transmitter 15-4 and exports the air pressure of the second airduct 8, and signal is fed back to PLC by cable, exports signal after PLC computing, and force value shows at host computer.5th temperature shows/control unit 16-5, the air themperature of outlet the second airduct 8 is checked by the 5th temperature sensor 15-5, signal is fed back to PLC by cable, after PLC computing, output control signals to first on middle pressure steam pipe 7 regulate the actuator of valve 12, by the aperture of control valve, change middle pressure steam quantity delivered, thus regulating the air themperature after air heater.6th liquid level shows/controls/alarm unit 16-6, examines the liquid level of pressure hot well 3 in side by the 6th fluid level transmitter 15-6, and signal is fed back to PLC by cable, and PLC program arranges level value height and reports to the police and low value warning；And after PLC computing, output control signals to second on the second low pressure condensate pipe 12 regulate the actuator of valve 18, by the aperture of control valve, emptying is pressed condensed water in condensation water collection tank 3 to lower position.7th liquid level shows/controls/alarm unit 16-7, is examined the liquid level of side low pressure hot well 4 by the 7th fluid level transmitter 15-7, and signal is fed back to PLC by cable, and PLC program arranges level value height and reports to the police and low value warning；And after PLC computing, output control signals to the 3rd on condensation at low temperature water pipe 14 regulate the actuator of valve 19, by the aperture of control valve, the condensed water in emptying low pressure cold Condensed water collection tank 4 is to lower position.Eight flow indications/control unit 16-8; the flow on frequency conversion condensate pump 5 low exit temperature condensate pipe 11 is detected by the 8th flow transducer 15-8; signal is fed back to PLC by cable; the second converter 5-2 of frequency conversion condensate pump 5 is output control signals to after PLC computing; regulate the rotating speed of the second frequency conversion motor 5-1; thus saving electric energy, effectively protection condensate pump 5.

Claims (6)

  1. null1. the air heating apparatus for alkali recovery furnace，It includes aerator (1)、Air heat exchanger (2)、Middle pressure hot well (3)、Low pressure hot well (4)、Frequency conversion condensate pump (5)、First airduct (6)、Middle pressure condensate pipe (9)、First low pressure steam pipe (10)、First low pressure condensate pipe (11)、Condensation at low temperature water pipe (14),It is characterized in that: aerator (1) air outlet connects the first airduct (6)，First airduct (6) other end connects the first cold wind import (2-1) of air heater (2)，Upper second hot-blast outlet (2-2) of air heater (2) connects the second airduct (8)，Middle pressure condensate pipe (9) connect air heater (2) the 4th in pressure condensation-water drain (2-4) and middle pressure hot well (3) second in press condensed water import (3-2)；First low pressure condensate pipe (11) connects the 6th low pressure condensation-water drain (2-6) of air heater (2) and the 4th low pressure condensation water inlet (4-4) of low pressure hot well (4), first low pressure steam pipe (10) connects the second low pressure steam pipe (20), and the second low pressure steam pipe (20) is connected to the 5th middle pressure steam import (2-5) of air heater (2)；Second low pressure condensate pipe (12) presses the 3rd low pressure condensation-water drain (3-3) of hot well (3) and the 3rd low pressure condensation water inlet (4-3) of low pressure hot well (4) in connecting；3rd low pressure condensate pipe (13) connects the second low pressure condensation-water drain (4-2) and the frequency conversion condensate pump (5) of low pressure hot well (4)；Water pump (5) outlet of frequency conversion condensation connects condensation at low temperature water pipe (14)；3rd low pressure steam pipe (21) connects low pressure steam pipe outlet (4-1) of low pressure hot well (4), PLC controls device 16 and shows/control unit (16-1) containing first flow, second pressure display unit (16-2), 3rd temperature display unit (16-3), 4th pressure display unit (16-4), 5th temperature shows/control unit (16-5), 6th liquid level shows/controls/alarm unit (16-6), 7th liquid level shows/controls/alarm unit (16-7), eight flow indications/control unit (16-8).
  2. 2. a kind of air heating apparatus for alkali recovery furnace according to right 1, it is characterised in that: described middle pressure hot well (3) is provided with the first low-pressure steam outlet (3-1), pressure condensed water import (3-2), the 3rd condensed water discharge outlet (3-3) in second.
  3. 3. a kind of air heating apparatus for alkali recovery furnace according to right 1, it is characterised in that: described low pressure hot well (4) is provided with the first low-pressure steam outlet (4-1), the second condensed water discharge outlet (4-2), the 3rd low pressure condensation water inlet (4-3), the 4th low pressure condensation water inlet (4-4).
  4. null4. a kind of air heating apparatus for alkali recovery furnace according to right 1，It is characterized in that: described first flow shows/control unit (16-1) connects first flow transmitter (15-1) and aerator the first converter (1-2)，Second pressure display unit (16-2) connects the second pressure transmitter (15-2)，3rd temperature display unit (16-3) connects three-temperature sensor (15-3)，4th pressure display unit (16-4) connects the 4th pressure transmitter (15-4)，5th temperature shows/control unit (16-5) connects first on the 5th temperature sensor (15-5) and middle pressure steam pipe and regulates valve (17)，6th liquid level shows/controls/alarm unit (16-6) connects the 6th fluid level transmitter (15-6) and second and regulates valve (18)，7th liquid level shows/controls/alarm unit (16-7) connects the 7th fluid level transmitter (15-7) and the 3rd and regulates valve (19)，Eight flow indications/control unit (16-1) connects second converter (5-2) of the 8th flow transducer (15-1) and frequency conversion condensate pump (5).
  5. 5. a kind of air heating apparatus for alkali recovery furnace according to right 1, it is characterised in that: described the first converter (1-2) on aerator (1) shows with the first frequency conversion motor (1-1) and first flow respectively/control unit (16-1) is connected.
  6. 6. a kind of air heating apparatus for alkali recovery furnace according to right 1, it is characterised in that: described the second converter (5-2) on frequency conversion condensate pump (5) is connected with the second frequency conversion motor (5-1) and eight flow indications/control unit (16-8) respectively.
CN201610283260.3A 2016-04-29 2016-04-29 A kind of air heating apparatus for alkali recovery furnace Active CN105757708B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201844197U (en) * 2010-05-11 2011-05-25 北京拓峰科技开发有限责任公司 Condensation water recycling and residual heat using device
EP2568130A2 (en) * 2011-09-12 2013-03-13 Hitachi, Ltd. Heat recovery system of the boiler with CO2 capture system
CN203718735U (en) * 2014-01-23 2014-07-16 绍兴沃能新能源环保科技有限公司 Three-stage flash cascade waste heat comprehensive utilization system for steam system of industrial and mining enterprises
CN104315755A (en) * 2014-10-13 2015-01-28 陕西科技大学 Wet process type tanning multi-section heating system and control method
CN204585963U (en) * 2015-05-04 2015-08-26 上海炳标环保科技有限公司 A kind of secondary utilizes steam energy conserving system
CN205717299U (en) * 2016-04-29 2016-11-23 中国轻工业武汉设计工程有限责任公司 A kind of air heating apparatus for alkali recovery furnace

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201844197U (en) * 2010-05-11 2011-05-25 北京拓峰科技开发有限责任公司 Condensation water recycling and residual heat using device
EP2568130A2 (en) * 2011-09-12 2013-03-13 Hitachi, Ltd. Heat recovery system of the boiler with CO2 capture system
CN203718735U (en) * 2014-01-23 2014-07-16 绍兴沃能新能源环保科技有限公司 Three-stage flash cascade waste heat comprehensive utilization system for steam system of industrial and mining enterprises
CN104315755A (en) * 2014-10-13 2015-01-28 陕西科技大学 Wet process type tanning multi-section heating system and control method
CN204585963U (en) * 2015-05-04 2015-08-26 上海炳标环保科技有限公司 A kind of secondary utilizes steam energy conserving system
CN205717299U (en) * 2016-04-29 2016-11-23 中国轻工业武汉设计工程有限责任公司 A kind of air heating apparatus for alkali recovery furnace

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
曹春华: "《碱回收炉空气加热器冷凝水系统》", 《中国造纸》 *

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