CN104310434B - A kind of device for processing abraum salt and technique - Google Patents
A kind of device for processing abraum salt and technique Download PDFInfo
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- CN104310434B CN104310434B CN201410627536.6A CN201410627536A CN104310434B CN 104310434 B CN104310434 B CN 104310434B CN 201410627536 A CN201410627536 A CN 201410627536A CN 104310434 B CN104310434 B CN 104310434B
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- 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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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Abstract
The invention discloses a kind of device for processing abraum salt, its structure includes industry feeder, multisection type indirect heater, Heat-conduction oil circulation system, fused salt blood circulation, organic exhaust gas conveyer and abraum salt waste-heat recoverer.The invention also discloses a kind of technique for processing abraum salt, including process, conduction oil working medium circulation, hot melt salt working medium circulation and hot blast and the process of tail gas of abraum salt.The present invention can efficiently accomplish, for the device and technique processing abraum salt, the process requirement that industrial waste salt is refined, solves waste gas emission problem simultaneously, and whole process system energy utilization efficiency is high, and secondary pollution is few.
Description
Technical field
The present invention relates to a kind of device for processing garbage, particularly relate to a kind of device for processing abraum salt, this
Invention additionally provides the technique using said apparatus to process abraum salt.
Background technology
Industrial circle has a lot of enterprise to have abraum salt to produce, especially in field of fine chemical in process of production.As double sweet
Phosphine, the production of glyphosate, often produce 1 ton of glyphosate technicals, produce about 1.3 tons containing various organic murder by poisoning things
Useless sodium chloride salt；Such as the production of AKD, often produce 1 ton of AKD, produce about 2 tons containing organic useless chlorine
Change sodium salt；Such as the production of hydrazine hydrate, often produce 1 ton of hydrazine hydrate, produce the useless sodium chloride salt of about 4 tons.These give up
Salt, because of the restriction of production technology, is converted into solid waste by producer mostly, a large amount of owing to relating in its production process
Organic components, the most this salt garbage itself has certain toxicity.
At present, the process of abraum salt mainly uses hot blast directly to contact high-temperature calcination method, utilizes substantial amounts of temperature up to
The hot blast of 600～800 DEG C directly contacts in calcining furnace with abraum salt, makes Organic substance complete cracking process under the high temperature conditions.
But this method is limited for time of contact with hot blast due to abraum salt, the temperature of salinity itself not up to preferred temperature, residual
Organic component content is stayed to be difficult to control.Meanwhile, because temperature is limited residing for Organic substance, it has been difficult to permineralization, very
The organic component that a big part is converted into form increasingly complex remains in hot blast.The most this method is that solid-state is dirty
Dye thing transfer becomes the process of a kind of gaseous contaminant.
On the other hand, the equipment that can accept high-temperature process at present mainly has swinging heating furnace, multi-layer discs to split
Solving stove etc., these equipment use high-temperature hot-air directly or indirectly mostly and abraum salt carries out heat exchange operation, thus reach to allow useless
Salt reaches a high temperature the production carrying out cracking, and it is relatively low that it processes technique efficiency.With Pintsch process swinging heating furnace technique it is
Example.Owing to burning uses the mode of direct-fire burning, high-temperature tail gas temperature reaches 300 DEG C～500 DEG C, outer row,
Efficiency of combustion is less than 70%.
Additionally, actually to complete two processes, the first step completing to add thermal cracking, it is achieved being dried of abraum salt, second
The heating and calcining of step salt to be realized.As a example by the aqueous abraum salt of 5%, it is dried institute's calorific requirement supply and calcining institute calorific requirement
Supply is about 45%:55%.Both thermic loads are suitable, and prior art uses single step operation, ignores
The thermic load requirement of material itself, it is difficult to meet the design concept of low energy consumption.After completing heating, material self-temperature is relatively
Height, in order to ensure the conveying under normal temperature condition, in addition it is also necessary to increases cooling device, such as uses water-cooled or air-cooled heat exchange
Equipment.Therefore, add from the point of view of needed for thermal cracking, the heat of heat demand and actual consumption thermal source supplies from be finally completed salt,
The thermal efficiency of the most overall useless salt treatment process is still less than 30%.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved is to provide little, the energy of a kind of pollution
Consume device and technique for processing abraum salt low, that the thermal efficiency is high.
For achieving the above object, the invention provides a kind of device for processing abraum salt, including industry feeder, many
Segmentation indirect heater, Heat-conduction oil circulation system, fused salt blood circulation, organic exhaust gas conveyer and abraum salt waste heat recovery
Device；Described multisection type indirect heater has feeding mouth and discharging opening, and described feeding mouth connects with described industry feeder,
Described discharging opening connects with described abraum salt waste-heat recoverer；Described multisection type indirect heater at least includes that first paragraph is indirect
Heating furnace and second segment indirect heater, described first paragraph indirect heater with conduction oil as heat source, described second
Section indirect heater is with liquid molten salt as heat source；Described first paragraph indirect heater follows with described conduction oil successively
Loop systems, described abraum salt waste-heat recoverer couple, described abraum salt waste-heat recoverer again with described first paragraph indirect heater
Couple and form loop；Described second segment indirect heater couples with described fused salt blood circulation and forms loop；Described have
Machine waste gas conveyer is arranged between described fused salt blood circulation and described multisection type indirect heater, for by described many
The waste gas that segmentation indirect heater produces is delivered to described fused salt blood circulation.
Further, described Heat-conduction oil circulation system include Heat-transfer Oil Pump, hot blast waste-heat recoverer, conduction oil storage tank,
Conduction oil circulation line and expansion slot, described Heat-transfer Oil Pump, described conduction oil storage tank and described hot blast waste-heat recoverer it
Between by described conduction oil circulation line connect, described conduction oil storage tank is connected with described abraum salt waste-heat recoverer, described
Hot blast waste-heat recoverer is connected with described first paragraph indirect heater by described expansion slot；Conduction oil can be led described
Under the driving of hot oil pump, enter described abraum salt waste-heat recoverer from described conduction oil storage tank, then sequentially enter described heat
Wind waste-heat recoverer, described expansion slot, finally enter described first paragraph indirect heater, and described conduction oil is described
One section of indirect heater can be back to described heat conduction oil storage tank with after abraum salt heat exchange.
Further, described conduction oil is described abraum salt with the heat transfer process of abraum salt in described first paragraph indirect heater
Dry run.
Further, described fused salt blood circulation includes that electric heating fused salt storage tank, pump for liquid salts, molten salt furnace, fused salt circulate
Pipeline, described electric heating fused salt storage tank, described pump for liquid salts connected by described fused salt circulation line with described molten salt furnace,
Described molten salt furnace is connected with described second segment indirect heater, and hot melt salt is heating and melting in described electric heating fused salt storage tank
After become liquid molten salt, described liquid molten salt enters described molten salt furnace under the driving of described pump for liquid salts, and in institute
Stating and enter described second segment indirect heater after being heated in molten salt furnace, described liquid molten salt adds indirectly at described second segment
Hot stove can be back to described electric heating fused salt storage tank with after abraum salt heat exchange.
Further, described liquid molten salt is described with the heat transfer process of abraum salt in described second segment indirect heater
The calcination process of abraum salt.
Further, described fused salt blood circulation also includes combustor and blower fan, described combustor and described organic exhaust gas
Conveyer connects, and described organic exhaust gas conveyer can be defeated by the organic tail gas produced in described multisection type indirect heater
Deliver to described combustor, described organic tail gas in described combustor with fuel one combust, formed combustion flame and turn
Turning to inorganic component, the spiral heating coil pipe in described molten salt furnace is heated by described combustion flame, and described blower fan can be by
Hot blast in described molten salt furnace and described combustor is delivered to described hot blast waste-heat recoverer.
Further, described first paragraph indirect heater has dryer section heater, and described dryer section heater is used for will
Abraum salt is dried；Described Heat-conduction oil circulation system is to the delivered inside conduction oil of described dryer section heater, described dryer section
The outside of heater and abraum salt carry out contact heat-exchanging, so that abraum salt is dried.
Further, described dryer section heater is spiral coil heater or hollow disc heater.
Further, described second segment indirect heater has bringing-up section heater, and described bringing-up section heater is for right
Abraum salt carries out heating and calcining；Described fused salt blood circulation to the delivered inside liquid molten salt of described bringing-up section heater,
The outside of described bringing-up section heater and abraum salt carry out contact heat-exchanging.
Further, described bringing-up section heater is spiral coil heater or hollow disc heater.
Further, the inside of described abraum salt waste-heat recoverer has hollow vertical heat exchanging plate, and abraum salt can be along described
Hollow vertical heat exchanging plate declines naturally；Described abraum salt waste-heat recoverer also has interlayer, and conduction oil can be at described interlayer
Interior flowing；Described abraum salt transfers heat to described conduction oil during declining, thus completes heat transfer process.
Further, described abraum salt waste-heat recoverer is powder flow heat exchanger.
Further, described molten salt furnace uses industrial combustion gas stove or industrial coal stove, being internally provided with of described molten salt furnace
Spiral heating coil pipe, liquid fused salt sends described molten salt furnace after being heated in described spiral heating coil pipe.
Further, described hot blast waste-heat recoverer is gas liquid exchanger.
Further, described hot blast waste-heat recoverer be plate type heat exchanger, plate-fin heat exchanger, lamella heat exchanger or
Shell-and-tube heat exchanger.
Further, described conduction oil is synthesis type conduction oil, and described synthesis type conduction oil is alkyl benzene-type (benzenoid form)
Conduction oil, alkylnaphthalene type conduction oil, alkyl biphenyl type conduction oil, biphenyl and Biphenyl Ether eutectic mixture type conduction oil,
Or alkyl biphenyl ether type conduction oil.
Further, described fuse salt uses binary inorganic salt system or ternary inorganic salt system.
Further, described ternary inorganic salt system is 53Wt%KNO3, 40Wt%NaNO2And 7Wt%NaNO3
Combined system, described binary inorganic salt system is 60Wt%NaNO3And 40Wt%KNO3Combined system.
Present invention also offers and a kind of use above-mentioned any one to carry out the work of abraum salt process for the device processing abraum salt
Skill, described technique includes following four aspect:
(1) process of abraum salt: abraum salt is delivered to described first indirect heater, described abraum salt by described industry feeder
, under the effect of material-conveying mechanism, enter described second indirect heater in described first indirect heater after drying,
And in described second indirect heater, complete heating and the process of calcining；Salt after calcining enters described abraum salt waste heat and returns
Receive device, and naturally decline in described abraum salt waste-heat recoverer, transfer heat to described abraum salt waste-heat recoverer simultaneously
Conduction oil in interlayer, last described salt exports from abraum salt waste-heat recoverer, becomes discharging salt, and described discharging salt is i.e.
For acceptable industrial salt.
(2) conduction oil working medium circulation: described Heat-conduction oil circulation system includes Heat-transfer Oil Pump, hot blast waste-heat recoverer, leads
Deep fat storage tank and expansion slot, conduction oil, under the driving of described Heat-transfer Oil Pump, enters described useless from described conduction oil storage tank
Salt waste-heat recoverer, then sequentially enters described hot blast waste-heat recoverer, expansion slot, finally enters described first intersegmental
Connecing heating furnace, described conduction oil is back to described conduction oil storage tank with after abraum salt heat exchange in described first paragraph indirect heater.
(3) hot melt salt working medium circulation: described fused salt blood circulation includes electric heating fused salt storage tank, pump for liquid salts, molten salt furnace,
Hot melt salt becomes liquid molten salt after heating and melting in described electric heating fused salt storage tank, and described liquid molten salt is described
Enter described molten salt furnace under the driving of pump for liquid salts, and enter described second segment after being heated in described molten salt furnace and indirectly heat
Stove, described liquid molten salt is back to the storage of described electric heating fused salt with after abraum salt heat exchange in described second segment indirect heater
Groove.
(4) hot blast and the process of tail gas: described fused salt blood circulation also includes combustor and blower fan, between described multisection type
Connect in heating furnace produce organic tail gas be delivered to described combustor through described organic exhaust gas conveyer, described in have tail
Gas mix with air in described combustor and with fuel one combust, formed combustion flame, at the height of described combustor
Under temperature hyperoxic conditions, the volatile organic matter in described organic tail gas burns and is converted into inorganic component, described combustion flame
Heating the spiral heating coil pipe in described molten salt furnace, described blower fan is by the hot blast in described molten salt furnace and described burning
Hot blast in machine is delivered to described hot blast waste-heat recoverer, and described hot blast is warm after heat exchange in described hot blast waste-heat recoverer
Degree is down to 80～200 DEG C, is then passed through smoke stack emission to air.
Further, in described conduction oil working medium circulation, the temperature range of described conduction oil is 120 DEG C～200 DEG C.
Further, in described hot melt salt working medium circulation, the temperature range of described liquid molten salt is 300 DEG C～500 DEG C.
The present invention for processing the device of abraum salt and having the beneficial effect that of technique
The present invention uses conduction oil working medium circulation and hot melt salt working medium circulation to be dried abraum salt respectively and calcination process,
Greatly improve the efficiency of utilization of system.High temperature heat source required in calcination process uses fuse salt, and fuse salt passes
The heat part passed Organic substance thermal cracking in abraum salt, a part is recycled and meets being dried of charging abraum salt
Required.The high-temperature hot-air produced in molten salt furnace and combustion furnace realizes waste heat recovery also by the heat transfer of conduction oil.?
The heat loss of the equipment that is only for processing produced heat loss during the device of abraum salt processes abraum salt of the whole present invention,
The sensible heat of the qualified salt of industry, the sensible heat of remaining tail gas, therefore overall thermal efficiency can reach 60～80%, with traditional life
The production. art thermal efficiency is compared and is improved 150%～200%.
Below with reference to accompanying drawing, the technique effect of design, concrete structure and the generation of the present invention is described further, with
It is fully understood from the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is structural representation and the energy system of the device for processing abraum salt of a preferred embodiment of the present invention
Figure；
Fig. 2 be the present invention a preferred embodiment in the schematic diagram of Heat-conduction oil circulation system；
Fig. 3 be the present invention a preferred embodiment in the schematic diagram of fused salt blood circulation.
Detailed description of the invention
As shown in Figures 1 to 3, a preferred embodiment of the present invention provides a kind of device for processing abraum salt, its knot
Structure includes industry feeder 101, multisection type indirect heater, Heat-conduction oil circulation system, fused salt blood circulation, organic
Waste gas conveyer 107 and abraum salt waste-heat recoverer 106；The feeding mouth of multisection type indirect heater and described industry feeding
Machine 101 connects, and its discharging opening connects with abraum salt waste-heat recoverer 106；Multisection type indirect heater at least includes first
Section indirect heater 102 and second segment indirect heater 103, first paragraph indirect heater 102 is with conduction oil for heating
Thermal source, second segment indirect heater 103 is with liquid molten salt as heat source；First paragraph indirect heater 102 is successively
Coupling with the hot blast waste-heat recoverer 104 in Heat-conduction oil circulation system, abraum salt waste-heat recoverer 106, abraum salt waste heat returns
Receive device 106 and couple formation loop again with first paragraph indirect heater 102；Second segment indirect heater 103 follows with fused salt
Molten salt furnace 105 in loop systems couples and forms loop；Organic exhaust gas conveyer 107 is arranged in fused salt blood circulation
Combustor 110 and multisection type indirect heater between, for by multisection type indirect heater produce tail gas i.e. waste gas
It is delivered to combustor 110.The transmission direction that arrow 108 is conduction oil in Fig. 1, the direction of arrow 109 is liquid
The transmission direction of fuse salt.
In presently preferred embodiments of the present invention, as in figure 2 it is shown, Heat-conduction oil circulation system includes Heat-transfer Oil Pump 111, hot blast
Waste-heat recoverer 104, conduction oil storage tank 112, conduction oil circulation line 113 and expansion slot 114, Heat-transfer Oil Pump 111,
Being connected by conduction oil circulation line 113 between conduction oil storage tank 112 and hot blast waste-heat recoverer 104, conduction oil stores up
Groove 112 is connected with abraum salt waste-heat recoverer 106, and hot blast waste-heat recoverer 104 is intersegmental with first by expansion slot 114
Connect heating furnace 102 to connect；Conduction oil can enter useless under the driving of Heat-transfer Oil Pump 111 from conduction oil storage tank 112
Salt waste-heat recoverer 106, then sequentially enters hot blast waste-heat recoverer 104, expansion slot 114, finally enters first paragraph
Indirect heater 102, conduction oil is back to heat conduction oil storage tank 112 with after abraum salt heat exchange in first paragraph indirect heater 102.
Conduction oil is actual with the heat transfer process of abraum salt in first paragraph indirect heater 102 is the dry run carrying out abraum salt.
First paragraph indirect heater 102 is to be realized by its internal dryer section heater to the dry of abraum salt, heat conduction
Oil circulating system contacts with abraum salt to the delivered inside conduction oil of dryer section heater, the outside of dryer section heater,
Abraum salt indirectly with conduction oil heat exchange so that abraum salt is dried.In the present embodiment, dryer section heater is that hollow disc adds
Hot device, can also be spiral coil heater in other embodiments.
As it is shown on figure 3, fused salt blood circulation include electric heating fused salt storage tank 115, pump for liquid salts 116, molten salt furnace 105,
Fused salt circulation line 118, combustor 110 and blower fan 119.Wherein, electric heating fused salt storage tank 115, pump for liquid salts 116
Being connected by fused salt circulation line 118 with molten salt furnace 105, molten salt furnace 105 is connected with second segment indirect heater 103,
Hot melt salt becomes liquid molten salt after heating and melting in electric heating fused salt storage tank 115, and liquid molten salt is at pump for liquid salts 116
Driving under entrance molten salt furnace 105, and enter second segment indirect heater 103, liquid after being heated in molten salt furnace 105
Fuse salt is back to electric heating fused salt storage tank 115 with after abraum salt heat exchange in second segment indirect heater 103.Liquid molten
Salt in second segment indirect heater 103 with the heat transfer process of abraum salt actual be the heating that dried abraum salt is carried out and
Calcination process.
Second segment indirect heater 103 is to be realized by its internal bringing-up section heater to heating and the calcining of abraum salt
, fused salt blood circulation is to the delivered inside liquid molten salt of bringing-up section heater, and the outside of bringing-up section heater is with useless
Salt contacts, abraum salt indirectly with liquid molten salt heat exchange so that abraum salt calcining.In the present embodiment, bringing-up section
Heater is hollow disc heater, can also be spiral coil heater in other embodiments.
Combustor 110 is connected with organic exhaust gas conveyer 107, and organic exhaust gas conveyer 107 can be indirect by multisection type
The organic tail gas produced in heating furnace is delivered to combustor 110, the flowing side that arrow 120 is organic tail gas in Fig. 3
To.Organic tail gas in combustor 110 with fuel one combust, form combustion flame and be also converted into inorganic component, combustion
Spiral heating coil pipe in molten salt furnace 105 is heated by the flame that makes a fire.Blower fan 119 can be by molten salt furnace 105 and combustor 110
In hot blast be delivered to hot blast waste-heat recoverer 104.
In presently preferred embodiments of the present invention, abraum salt waste-heat recoverer 106 is powder flow heat exchanger, has hollow inside it
Vertical heat exchanging plate, abraum salt can decline naturally along this hollow vertical heat exchanging plate；Abraum salt waste-heat recoverer 106 also has
Interlayer, conduction oil can be in this folder intrastratal flow.Abraum salt transfers heat to conduction oil during declining, thus complete
Become heat transfer process.
In presently preferred embodiments of the present invention, molten salt furnace 105 be internally provided with spiral heating coil pipe, liquid fused salt is at spiral shell
Described molten salt furnace is sent after being heated in rotation heating coil.Molten salt furnace 105 uses industrial combustion gas stove, in other embodiments
Industrial coal stove can also be used,
Hot blast waste-heat recoverer 104 is gas liquid exchanger, uses plate type heat exchanger, in other embodiments in the present embodiment
In can be plate-fin heat exchanger, lamella heat exchanger, or shell-and-tube heat exchanger.
Conduction oil is synthesis type conduction oil, such as alkyl benzene-type (benzenoid form) conduction oil, alkylnaphthalene type conduction oil, alkane
Base biphenyl type conduction oil, biphenyl and Biphenyl Ether eutectic mixture type conduction oil or alkyl biphenyl ether type conduction oil.
In presently preferred embodiments of the present invention, fuse salt uses ternary inorganic salt 53Wt%KNO3, 40Wt%NaNO2
And 7Wt%NaNO3Combined system, binary inorganic salt 60Wt%NaNO can also be used in other embodiments3
And 40Wt%KNO3Combined system.
The technical process carrying out abraum salt process for the device that processes abraum salt of the present embodiment includes following four aspect:
(1) process of abraum salt: abraum salt is delivered to the first indirect heater 102 by industry feeder 101, and abraum salt is the
, under the effect of material-conveying mechanism, enter the second indirect heater 103 in one indirect heater 102 after drying, and
Heating and the process of calcining is completed in the second indirect heater 103；Salt after calcining enters abraum salt waste-heat recoverer
106, and naturally decline in abraum salt waste-heat recoverer 106, transfer heat to abraum salt waste-heat recoverer 106 simultaneously
Interlayer in conduction oil, finally from abraum salt waste-heat recoverer 106 export, become discharging salt, this discharging salt is
Acceptable industrial salt.
(2) conduction oil working medium circulation: conduction oil, under the driving of Heat-transfer Oil Pump 111, enters from conduction oil storage tank 112
Abraum salt waste-heat recoverer 106, then sequentially enters hot blast waste-heat recoverer 104, expansion slot 114, finally enters first
Section indirect heater 102, conduction oil is back to conduction oil storage tank with after abraum salt heat exchange in first paragraph indirect heater 102
112。
(3) hot melt salt working medium circulation: hot melt salt becomes liquid molten after heating and melting in electric heating fused salt storage tank 115
Salt, liquid molten salt enters molten salt furnace 105 under the driving of pump for liquid salts 116, and it is laggard to be heated in molten salt furnace 105
Entering second segment indirect heater 103, liquid molten salt is back to after abraum salt heat exchange in second segment indirect heater 103
Electric heating fused salt storage tank 115.
(4) hot blast and the process of tail gas: the organic tail gas produced in multisection type indirect heater carries through organic exhaust gas
Machine 107 is delivered to combustor 110, and then organic tail gas mixes with air in combustor 110, and together with fuel
Burning, formed combustion flame, the temperature of combustion flame more than 1100 DEG C, waving in organic tail gas at this temperature
The property sent out organic compound combustion can realize permineralization and be converted into inorganic component, it is thus achieved that harmless treatment.Burning
Spiral heating coil pipe in molten salt furnace 105 is also heated by flame.Blower fan 119 is by the hot blast in molten salt furnace 105 and combustion
Hot blast in burning machine 110 is delivered to hot blast waste-heat recoverer 104, and hot blast is in hot blast waste-heat recoverer 104 after heat exchange
Temperature is down to 80～200 DEG C, is then passed through smoke stack emission to air.
Fig. 1 gives the energy system figure of the device for processing abraum salt of presently preferred embodiments of the present invention, it is assumed that ring
The combustion air of border temperature and abraum salt heat are zero, then the satisfied following balance of the present embodiment process heat load:
Q1+Q5+Q7=Q2+Q3+ Δ Q1
Q3+Q8=Q4+QRow+ΔQ2
Q2+Q4=Q5+Q6+Q7+Q9+ Δ Q3
Q9+Q6=Q8+Q10+ Δ Q4
Q1=Δ Q1+ Δ Q2+ Δ Q3+ Δ Q4+QRow+Q10
Wherein, Q1 is that fuel combustion supplies heat；Q2 is that molten salt furnace 105 exports liquid fused salt institute heat content；Q3 is
Molten salt furnace 105 combustion tail gas institute heat content；Q4 is that conduction oil exports institute's heat content at hot blast waste-heat recoverer 104；
Q5 is that multisection type indirect heater produces institute's heat content in organic exhaust gas；Q6 is that conduction oil is at first paragraph indirect heater
102 exit institute heat content；Q7 is that conduction oil is in second segment indirect heater 103 exit institute heat content；Q8 is
Conduction oil is in abraum salt waste-heat recoverer 106 exit institute heat content；Q9 is that second segment indirect heater 103 exports hot salt
Institute's heat content；Q10 is abraum salt waste-heat recoverer 106 exit industry qualified salt institute heat content；Δ Q1 is molten salt furnace 105
And the heat loss of auxiliary member；Δ Q2 is the heat loss of hot blast waste-heat recoverer 104 and auxiliary member；Δ Q3 is that multisection type adds
Hot stove and the heat loss of auxiliary member；Δ Q4 is the heat loss of abraum salt waste-heat recoverer 106 and auxiliary member.
As a example by certain factory hydrazine hydrate evaporative crystallization abraum salt 50kg/h, in this abraum salt, Main Ingredients and Appearance is sodium chloride salt, and abraum salt contains
There are total organic carbon 130mg/L (in terms of saturated brine), moisture content 4% (Wt/Wt%).Production work through the present embodiment
After skill processes, qualified products salt sodium chloride content is 99.5% (Wt/Wt%), and in product salt, total organic carbon is 7mg/L
(in terms of saturated brine).
In the present embodiment, the dryer section in multisection type indirect heater, the conduction oil of the i.e. first indirect heater 102 enters
Material oil temperature is 180 DEG C, and discharging oil temperature is 120 DEG C.Bringing-up section in multisection type indirect heater, i.e. second heats indirectly
The charging temperature of molten salt of stove 103 is 450 DEG C, and discharging temperature of molten salt is 420 DEG C.
In multisection type indirect heater, abraum salt feeding temperature is 20 DEG C, and abraum salt drop temperature is 380 DEG C, and abraum salt waste heat returns
The drop temperature receiving device 106 is 120 DEG C.
In implementation process, burning natural gas consumption is 0.68Nm3/ h, with calorific value 31MJ/Nm3Consider, burning input heat
Amount is 21.08MJ/h.Abraum salt treating capacity is 50kg/h, is warming up to 380 DEG C with the salt being dried at 80 DEG C and completes to add
The heat of the purified salt of heat calculates, and institute's calorific requirement is 13.97MJ/h, and the overall thermal efficiency of available the present embodiment is
66%.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art without
Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all in the art
Technical staff the most on the basis of existing technology can by logical analysis, reasoning, or a limited experiment
With the technical scheme obtained, all should be in the protection domain being defined in the patent claims.
Claims (9)
1. one kind for processing the device of abraum salt, it is characterised in that include industry feeder, multisection type indirect heater,
Heat-conduction oil circulation system, fused salt blood circulation, organic exhaust gas conveyer and abraum salt waste-heat recoverer；Between described multisection type
Connecing heating furnace and have feeding mouth and discharging opening, described feeding mouth connects with described industry feeder, described discharging opening and institute
State the connection of abraum salt waste-heat recoverer；Described multisection type indirect heater at least includes first paragraph indirect heater and second segment
Indirect heater, described first paragraph indirect heater with conduction oil as heat source, described second segment indirect heater with
Liquid molten salt is heat source；Described first paragraph indirect heater successively with described Heat-conduction oil circulation system, described useless
Salt waste-heat recoverer couples, and described abraum salt waste-heat recoverer couples formation loop again with described first paragraph indirect heater；
Described second segment indirect heater couples with described fused salt blood circulation and forms loop；Described organic exhaust gas conveyer sets
Put between described fused salt blood circulation and described multisection type indirect heater, for by described multisection type indirect heater
The waste gas produced is delivered to described fused salt blood circulation；
Described Heat-conduction oil circulation system includes that Heat-transfer Oil Pump, hot blast waste-heat recoverer, conduction oil storage tank, conduction oil circulate
Pipeline and expansion slot, by described between described Heat-transfer Oil Pump, described conduction oil storage tank and described hot blast waste-heat recoverer
Conduction oil circulation line connects, and described conduction oil storage tank is connected with described abraum salt waste-heat recoverer, and described hot blast waste heat returns
Receive device to be connected with described first paragraph indirect heater by described expansion slot.
2. one kind utilizes the technique that device as claimed in claim 1 carries out abraum salt process, it is characterised in that described work
Skill includes following aspect:
The process of abraum salt: abraum salt is delivered to described first paragraph indirect heater by described industry feeder, and described abraum salt exists
In described first paragraph indirect heater after drying, under the effect of material-conveying mechanism, enter described second segment indirectly heat
Stove, and in described second segment indirect heater, complete heating and the process of calcining；Salt after calcining enters described abraum salt
Waste-heat recoverer, and naturally decline in described abraum salt waste-heat recoverer, transfer heat to described abraum salt waste heat simultaneously
Conduction oil in withdrawer interlayer, last described salt exports from abraum salt waste-heat recoverer, becomes discharging salt, described in go out
Material salt is acceptable industrial salt；
Conduction oil working medium circulation: conduction oil, under the driving of described Heat-transfer Oil Pump, enters described from described conduction oil storage tank
Abraum salt waste-heat recoverer, then sequentially enters described hot blast waste-heat recoverer, described expansion slot, finally enters described
One section of indirect heater, described conduction oil is back to described heat conduction with after abraum salt heat exchange in described first paragraph indirect heater
Oil storage tank；In described conduction oil working medium circulation, the temperature range of described conduction oil is 120 DEG C～200 DEG C；
Hot melt salt working medium circulation: described fused salt blood circulation includes electric heating fused salt storage tank, pump for liquid salts, molten salt furnace, heat
Fused salt becomes liquid molten salt in described electric heating fused salt storage tank after heating and melting, described liquid molten salt is described molten
Enter described molten salt furnace under the driving of salt pump, and enter described second segment indirect heater after being heated in described molten salt furnace,
Described liquid molten salt is back to described electric heating fused salt storage tank with after abraum salt heat exchange in described second segment indirect heater；
In described hot melt salt working medium circulation, the temperature range of described liquid molten salt is 300 DEG C～500 DEG C；
Hot blast and the process of tail gas: described fused salt blood circulation also includes that combustor and blower fan, described multisection type add indirectly
The organic tail gas produced in hot stove is delivered to described combustor through described organic exhaust gas conveyer, and described organic tail gas exists
Described combustor mixes with air and with fuel one combust, form combustion flame, high at the high temperature of described combustor
Under the conditions of oxygen, the volatile organic matter in described organic tail gas burns and is converted into inorganic component, and described combustion flame is to institute
Stating the spiral heating coil pipe heating in molten salt furnace, described blower fan is by the hot blast in described molten salt furnace and described combustor
Hot blast be delivered to described hot blast waste-heat recoverer, described hot blast in described hot blast waste-heat recoverer after heat exchange temperature fall
To 80～200 DEG C, it is then passed through smoke stack emission to air.
3. technique as claimed in claim 2, it is characterised in that described Heat-transfer Oil Pump, described conduction oil storage tank and institute
Stating and connected by conduction oil circulation line between hot blast waste-heat recoverer, described conduction oil storage tank returns with described abraum salt waste heat
Receipts device connects, and described hot blast waste-heat recoverer is connected with described first paragraph indirect heater by described expansion slot.
4. technique as claimed in claim 2, it is characterised in that described electric heating fused salt storage tank, described pump for liquid salts and
Described molten salt furnace is connected by fused salt circulation line, and described molten salt furnace is connected with described second segment indirect heater.
5. technique as claimed in claim 2, it is characterised in that described first paragraph indirect heater has dryer section and adds
Hot device, described dryer section heater is for being dried abraum salt；Described Heat-conduction oil circulation system is to described dryer section heater
Delivered inside conduction oil, the outside of described dryer section heater and abraum salt carry out contact heat-exchanging, so that abraum salt is dried.
6. technique as claimed in claim 2, it is characterised in that described second segment indirect heater has bringing-up section and adds
Hot device, described bringing-up section heater is for heating abraum salt and calcining；Described fused salt blood circulation is to described heating
The delivered inside liquid molten salt of section heater, the outside of described bringing-up section heater and abraum salt carry out contact heat-exchanging.
7. technique as claimed in claim 2, it is characterised in that the inside of described abraum salt waste-heat recoverer has hollow
Vertical heat exchanging plate, abraum salt can decline naturally along described hollow vertical heat exchanging plate；Described abraum salt waste-heat recoverer also has
Having interlayer, conduction oil can be in described folder intrastratal flow；Described abraum salt is led described in transferring heat to during declining
Deep fat, thus complete heat transfer process.
8. technique as claimed in claim 2, it is characterised in that described hot blast waste-heat recoverer be plate type heat exchanger,
Plate-fin heat exchanger, lamella heat exchanger or shell-and-tube heat exchanger.
9. technique as claimed in claim 2, it is characterised in that described conduction oil is alkyl benzene-type conduction oil, alkyl
Naphthalene type conduction oil, alkyl biphenyl type conduction oil, biphenyl and Biphenyl Ether eutectic mixture type conduction oil or alkyl biphenyl ether
Type conduction oil.
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| CN105060314A (en) * | 2015-07-21 | 2015-11-18 | 山东中天科技工程有限公司 | Waste salt treating technology |
| CN106145162B (en) * | 2016-08-30 | 2018-03-23 | 安徽今朝环保科技有限公司 | Industrial slag salt two level calcines purifier and its application method |
| CN106424112B (en) * | 2016-11-03 | 2019-12-31 | 南京格洛特环境工程股份有限公司 | Multi-stage thermal desorption process and equipment for waste salt refining |
| CN107185948B (en) * | 2017-06-13 | 2023-03-10 | 北京纬纶华业环保科技股份有限公司 | Industrial waste salt system and method |
| CN107321755A (en) * | 2017-06-30 | 2017-11-07 | 江苏省环境科学研究院 | A kind of abraum salt process for reclaiming and its special purpose device |
| CN110227702B (en) * | 2019-05-17 | 2021-03-23 | 周丹丹 | Method for preparing flux by using chemical waste salt |
| CN110201976A (en) * | 2019-05-30 | 2019-09-06 | 北京航天环境工程有限公司 | A kind of abraum salt recycling treatment processing system and application |
| CN111484831A (en) * | 2019-12-24 | 2020-08-04 | 合肥皖化电泵有限公司 | Heat conducting oil for furnace water pump |
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| CN102616914B (en) * | 2011-01-31 | 2015-04-01 | 浙江新安化工集团股份有限公司 | Treatment method of phosphorus-containing waste from pesticide production and product obtained thereby |
| CN103267296B (en) * | 2013-06-05 | 2016-04-20 | 湖南化工研究院 | The method of the harmless treatment of industrial by-product waste salt dregs and recycling |
| CN103708572B (en) * | 2014-01-09 | 2014-11-12 | 山东潍坊润丰化工股份有限公司 | Resourceful treatment method for inorganic salts in industrial waste water |
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