CN207330970U - A kind of blast furnace gas saturator method cleaning system - Google Patents
A kind of blast furnace gas saturator method cleaning system Download PDFInfo
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- CN207330970U CN207330970U CN201721207437.8U CN201721207437U CN207330970U CN 207330970 U CN207330970 U CN 207330970U CN 201721207437 U CN201721207437 U CN 201721207437U CN 207330970 U CN207330970 U CN 207330970U
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- saturator
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Abstract
The utility model provides a kind of blast furnace gas saturator method cleaning system, including saturator, coal gas mist eliminator, device and dense salt mother liquid disposal device are matched somebody with somebody in the storage of lye mother liquor overflow, the saturator upper end is equipped with gas inlet and gas exit, the gas exit is connected with the coal gas mist eliminator import, the coal gas mist eliminator bottom liquid stream outlet is stored up with the lye mother liquor overflow to be connected with device, the coal gas mist eliminator is equipped with can be as the purified gas outlet that purified gas exports, the lye mother liquor overflow storage is connected with device and the dense salt mother liquid disposal device with the saturator.The utility model has been taken into account coal gas deep purifying, resources conservation and environment-protective circulating and has been utilized at the same time, while Blast Furnace Gas Quality is improved, no longer wastes the new energy and produces new pollution sources.
Description
Technical field
It the utility model is related to blast furnace gas purification field, more particularly to a kind of blast furnace gas saturator method depickling purification system
System.
Background technology
In recent years, one of the great power-saving technology of blast furnace gas dry dusting as steel industry " a three dry electricity ", it is more next
More it is widely used.But dry dedusting technology cannot effectively remove the sour gas such as HCl contained in blast furnace gas, cause follow-up
There is corrosion failure problem in gas piping and its auxiliary device, form gas leak hidden danger, it has also become blast furnace gas dry dusting
Most prominent contradiction in Technique Popularizing and application.Given this problem, takes some technologies and method in industry.The technology of mainstream
There are two classes：First, sour gas is chemically removed, such as spray lye in scrubbing tower, or gas is removed by alkali formula adsorbent
Contained HCl in body；Second, by blast furnace gas dehumidification (falling temperature method, solwution method etc.), prevent sour gas from being analysed in condensed water
Go out and corrosion pipeline.This two classes technology has practical application, also there is pertinent literature and patented technology utility model etc..It is anti-from scene
From the point of view of the situation of feedback, although the application of these technologies solves subproblem, some can bring the problem of other, such as wash
Tower sprays the technology of lye, it is necessary to consume substantial amounts of water, counteracts the advantages of water consumption that dry method dust is brought saves, meanwhile, inhale
Saline treatment amount after receipts is big, and follow-up moisture content in gas is big and influences user's thermal efficiency；Alkali formula adsorbent brings equipment again except HCl
The problem of quantity is more, occupation of land is larger, adsorbent input amount is larger, operating cost and larger Solid state fermentation amount.
Saturator is chemical industry commonly used equipment, and the moieties in gas are removed commonly used in liquid reactions, such as burnt
Producer gas deamination cleaning system, is exactly using saturator technique, with the ammonia in sulfate liquor absorbing and removing coal gas and produces sulphur ammonium.
Must be that absorbed gaseous matter is easy to react with liquid it should be noted that during using saturator method.Coke-stove gas is satisfied
During with device deamination, also need gas preheating to 60~70 DEG C.
The blast furnace gas temperature come out from TRT is typically 70~80 DEG C, this temperature is just conducive to chlorion in coal gas
With alkaline reaction, and the saturation degree of mother liquor can be improved.HCl in blast furnace gas is highly acid gas, is absorbed using lye.
It is therefore desirable to design a kind of blast furnace gas saturator method depickling cleaning system, carry out lye using saturator method and satisfy
With depickling to overcome the above problem.
Utility model content
The purpose of the utility model is to overcome the defect of the prior art, there is provided a kind of blast furnace gas saturator method depickling
Cleaning system, lye saturation depickling is carried out using saturator device, has the advantages that to take up an area province, efficient, energy conservation and environmental protection.
The utility model is realized in this way：
The utility model provides a kind of blast furnace gas saturator method cleaning system, including saturator, coal gas mist eliminator, lye
Device and dense salt mother liquid disposal device are matched somebody with somebody in mother liquor overflow storage, and the saturator upper end is equipped with gas inlet and gas exit, described
Gas exit is connected with the coal gas mist eliminator import, and the coal gas mist eliminator bottom liquid stream outlet is overflow with the lye mother liquor
Stream storage is connected with device, and the coal gas mist eliminator is equipped with can be as the purified gas outlet that purified gas exports, the lye mother liquor
Overflow storage is connected with device and the dense salt mother liquid disposal device with the saturator.
Further, the saturator includes concentric body and inner draft tube, the inner draft tube bottom with described
Body is connected, and the inner draft tube upper end is respectively equipped with lye reflux inlet and the gas inlet, and the body upper end is equipped with
The gas exit, the body bottom portion are equipped with lye pond, and lye pond upper end side wall is equipped with overflow port, the body lower end
Equipped with circulating mother liquor entrance, crystalline mother solution outlet and reflux mother liquor entrance, the lye reflux inlet, circulating mother liquor entrance and overflow
Head piece is stored up with the lye mother liquor overflow to be connected with device, the crystalline mother solution outlet and reflux mother liquor entrance with it is described
Dense salt mother liquid disposal device is connected.
Further, entrance lye spray assemblies are equipped with the gas inlet of the inner draft tube.
Further, the stent for being used to support the saturator is equipped with below the saturator.
Further, intumescence umbrella is equipped with the lye pond, the intumescence umbrella is located at the underface of the inner draft tube.
Further, circulating pump, overflow launder, the mother liquor storage tank that the lye mother liquor overflow storage includes being sequentially communicated with device
Groove is put with lye height, the placing height that the lye height puts groove is above the mother liquor storage tank and the placement of the saturator is high
Degree, the lye height put groove and are connected with the lye reflux inlet, and the coal gas mist eliminator bottom liquid stream outlet is satisfied with described
It is connected with the overflow port of device with the overflow launder, the circulating pump is connected with the circulating mother liquor entrance.
Further, the dense salt mother liquid disposal device includes dense salt mother liquor pump, crystallization tank and the evaporator being sequentially communicated,
The dense salt mother liquor pump is connected with crystalline mother solution outlet, and the crystallization tank is connected with the reflux mother liquor entrance, institute
State evaporator top and bottom and be respectively equipped with indirect steam outlet and crystal outlet.
Further, the evaporator is equipped with the steam inlet that interconnects and steam (vapor) outlet, the steam inlet with it is low
Warm waste heat blast-furnace equipment is connected.
Further, the stent for being used to support the saturator is equipped with below the saturator.
The utility model has the advantages that：
1st, the utility model system has been taken into account coal gas deep purifying, resources conservation and environment-protective circulating and has been utilized at the same time, is carrying
While high Blast Furnace Gas Quality, no longer waste the new energy and produce new pollution sources.
2nd, the utility model carries out lye saturation depickling using saturator device, while more than the middle low temperature in use blast furnace region
Heat, is evaporated crystallization by the strong brine of saturation, the work(of coal gas depickling purification and environmental protection treatment strong brine is completed in system
Can, have the advantages that to take up an area province, efficient, energy conservation and environmental protection.
3rd, the reaction was complete saves lye amount for the saturator method depickling of the utility model, reduces the salt water that need to be handled,
Condition is created to carry out environmental protection treatment using middle-low temperature heat.Solve conventional washing tower spray lye bring water consumption it is big,
The defects of pollution source that saline treatment amount is big and brings.
4th, the utility model employs saturator method and carries out blast furnace gas depickling purification, makes gaspipe network condensed water pH value control
System is 7~8, and coal gas does not produce sour corrosion to pipe network after ensure that purification.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of structure chart for blast furnace gas saturator method cleaning system that the utility model embodiment provides；
Fig. 2 is the knot of the saturator in a kind of blast furnace gas saturator method cleaning system that the utility model embodiment provides
Composition；
1st, saturator；11st, gas inlet；12nd, gas exit；13rd, body；14th, inner draft tube；15th, circulating mother liquor entrance；
16th, lye reflux inlet；17th, overflow port；18th, crystalline mother solution exports；19th, flow back mother liquor entrance；111st, stent；112nd, intumescence
Umbrella；2nd, coal gas mist eliminator；21st, import；22nd, bottom liquid stream exports；23rd, purified gas exports；3rd, device is matched somebody with somebody in lye mother liquor overflow storage；
31st, circulating pump；32nd, overflow launder；33rd, mother liquor storage tank；34th, lye height puts groove；4th, dense salt mother liquid disposal device；41st, dense salt mother liquor
Pump；42nd, crystallization tank；43rd, evaporator；431st, indirect steam exports；432nd, crystal exports.
Embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
The all other embodiment obtained, shall fall within the protection scope of the present invention.
Such as Fig. 1-Fig. 2, the utility model embodiment provides a kind of blast furnace gas saturator method cleaning system, including saturator
1st, device 3 and dense salt mother liquid disposal device 4 are matched somebody with somebody in coal gas mist eliminator 2, the storage of lye mother liquor overflow, and 1 upper end of saturator is equipped with coal
Gas import 11 and gas exit 12, the gas exit 12 are connected with 2 import 21 of coal gas mist eliminator, and the coal gas catches mist
2 bottom liquid stream of device outlet 22 is stored up with the lye mother liquor overflow to be connected with device 3, and the coal gas mist eliminator 2 is equipped with can conduct
The purified gas outlet 23 of purified gas output, lye mother liquor overflow storage with device 3 and the dense salt mother liquid disposal device 4 with
The saturator 1 is connected.The coal gas catches mist and uses baffle plate mist eliminator (can also be the mist eliminator of other forms).This reality
With new embodiment, coal gas enters saturator and carries out depickling dehydration, and the coal gas come out from saturator catches mist into baffle plate
Device removes alkali mist, and the coal gas that need to be purified enters saturator 1, and purified coal gas send to coal gas mist eliminator 2 from saturator outlet, catches
Except the coal gas of alkali mist is directly sent out as purified gas, the confession of the lye of saturator depickling and the mother liquor of circulation is matched somebody with somebody, female by lye
The storage of hydrorrhea stream meets that supply is adjusted with device 3, when mother liquor reaches certain saturation degree in saturator, is filled into dense salt mother liquid disposal
4 are put, in the system, dense salt mother liquor is pumped into supernatant liquor after dense salt mother liquid disposal device and is back to saturator, with knot
Brilliant mother liquor, which flows into, continues evaporation drying, the crystal relatively dried.The present embodiment at least has the advantages that：
(1) employ saturator method and carry out blast furnace gas depickling purification, make the control of gaspipe network condensed water pH value 7~8,
Coal gas does not produce sour corrosion to pipe network after ensure that purification.
(2) saturator method depickling is used, the saturated salt water of generation is seldom, reduces treating capacity.
(3) it directly ensure that the deacidification effect of coal gas using the temperature of initial coal gas, saved the energy.
(4) function of coal gas depickling purification and environmental protection treatment strong brine is completed in system, the coal gas from TRT outlets
Being caught by saturator depickling purification, droplet after removing send user to use, and purified coal gas no longer causes conveyance conduit acid corruption
Erosion, has the advantages that to take up an area province, efficient, energy conservation and environmental protection.
(5) system has been taken into account coal gas deep purifying, resources conservation and environment-protective circulating and has been utilized at the same time, is improving blast furnace coal
While makings amount, no longer waste the new energy and produce new pollution sources.
Optimize above-described embodiment, as shown in Fig. 2, the saturator 1 includes concentric body 13 and inner draft tube 14, it is described
14 bottom of inner draft tube is connected with the body 13, and 14 upper end of inner draft tube is respectively equipped with lye reflux inlet 16 and institute
Gas inlet 11 is stated, 13 upper end of body is equipped with the gas exit 12, and 13 bottom of body is equipped with lye pond, the alkali
Liquid pool upper end side wall is equipped with overflow port 17, and 13 lower end of body is equipped with circulating mother liquor entrance 15, crystalline mother solution outlet 18 and returns
Flow mother liquor entrance 19, the lye reflux inlet 16, circulating mother liquor entrance 15 and overflow port 17 with the lye mother liquor overflow
Storage is connected with device 3, crystalline mother solution outlet 18 and flow back mother liquor entrance 19 with dense 4 phase of salt mother liquid disposal device
Connection.Coal gas from blast furnace dry method TRT outlets, initially enters in saturator, certain density lye, coal are arranged at saturator bottom
Gas, through declining guide tube, is flowed out from saturator top from the intumescence umbrella of guide tube bottom, and intumescence umbrella is immersed in the lye of certain altitude,
Coal gas is uniformly flowed out from multiple guide vanes of intumescence umbrella, and gas-liquid two-phase comes into full contact with, and the acidic materials in coal gas are by lye
Neutralize and absorb, while the fine solid particle part in coal gas is washed into mother liquor.The later coal gas of depickling, which enters, catches mist system, passes through
Baffle plate mist eliminator (can also be the mist eliminator of other forms) removes lye droplet, this depickling cleaning system is flowed out, for user
Use.
Optimize above-described embodiment, sprayed as shown in Fig. 2, being equipped with entrance lye at the gas inlet 11 of the inner draft tube 14
Component 113.
Optimize above-described embodiment, as shown in Fig. 2, the lower section of the saturator 1 is equipped with the stent for being used to support the saturator 1
111。
Optimize above-described embodiment, as shown in Fig. 2, being equipped with intumescence umbrella 112 in the lye pond, the intumescence umbrella 112 is located at
The underface of the inner draft tube 14.Using saturator deacidifying process, intumescence umbrella is set in saturator, so that air-flow is uniformly distributed
Outflow, while increase the disturbance of gas, beneficial to reactive absorption.
Optimize above-described embodiment, as shown in Figure 1, the circulation that lye mother liquor overflow storage includes being sequentially communicated with device 3
Pump 31, overflow launder 32, mother liquor storage tank 33 and lye height put groove 34, and the placing height that the lye height puts groove 34 is above the mother
The placing height of liquid storage tank 33 and the saturator 1, the lye height put groove and are connected with the lye reflux inlet, the coal
The overflow port 17 of 2 bottom liquid stream of gas mist eliminator outlet 22 and the saturator 1 is connected with the overflow launder 32, the circulation
Pump 31 is connected with the circulating mother liquor entrance 15.This depickling cleaning system takes periodically continued operating duty, periodically carries out
Greatly alkali and water-refilling operation.Saturator must also periodically carry out hot water injection.Therefore, a large amount of mother liquors of formation (pass through acidic materials
The lye absorbed is neutralized, similarly hereinafter) need storage tank to switch storage.The mother liquor of overflow also enters mother liquor storage tank in saturator.Fresh
Lye is stored in the high storage tank put, and is flowed into certainly in saturator or mother liquor storage tank.The coal gas that need to be purified enters saturator 1, purification
Coal gas afterwards send from saturator outlet and to coal gas mist eliminator 2, catches except the coal gas of alkali mist is directly sent out as purified gas.Saturator takes off
The confession of the lye of acid and the mother liquor of circulation is matched somebody with somebody, and meets that supply is adjusted with device 3 by the storage of lye mother liquor overflow.Lye mother liquor overflow
Storage includes circulating pump 31, overflow launder 32, mother liquor storage tank 33, lye height with device 3 and puts groove 34.The utility model embodiment is worked
Cheng Wei：The lye mother liquor gone out from saturator alkali overflow, flows into overflow launder 32, the mother liquor that circulating pump 31 goes out overflow is squeezed into full first
With device bottom, make Recycling Mother Solution in saturator.When it is regular carry out greatly alkali and water-refilling operation when, a large amount of mother liquors of formation switch to
Mother liquor storage tank storage 33.Fresh lye is stored in the high storage tank 34 put, and is flowed into certainly in saturator 1 or mother liquor storage tank 33.
Optimize above-described embodiment, as shown in Figure 1, the dense salt mother liquid disposal device 4 includes the dense salt mother liquor being sequentially communicated
Pump 41, crystallization tank 42 and evaporator 43, the dense salt mother liquor pump 41 are connected with crystalline mother solution outlet 18, the crystallization tank
42 are connected with the reflux mother liquor entrance 19, and 43 top of evaporator and bottom are respectively equipped with indirect steam and export 431 Hes
Crystal outlet 432.The mother liquor of saturation is by conveying pumped, into dense salt mother liquid disposal device.Dense salt mother liquid disposal can profit
With the waste heat of BF Area, such as the middle-low temperature heat such as hot-blast stove fume, washing slag water, concentration is evaporated, by saturation mother liquor
Salt crystallizes out as far as possible, becomes byproduct or carries out environmental protection treatment as solid waste.The utility model embodiment is worked
Cheng Wei：The coal gas that need to be purified enters saturator 1, and purified coal gas send to coal gas mist eliminator 2 from saturator outlet, catches except alkali mist
Coal gas directly sent out as purified gas.The confession of the lye of saturator depickling and the mother liquor of circulation is matched somebody with somebody, by lye mother liquor overflow
Storage meets that supply is adjusted with device 3.Lye mother liquor overflow storage with device 3 include circulating pump 31, overflow launder 32, mother liquor storage tank 33,
Lye height puts groove 34.The lye mother liquor gone out from saturator alkali overflow, flows into overflow launder 32, the mother that circulating pump 31 goes out overflow first
Liquid squeezes into saturator bottom, makes Recycling Mother Solution in saturator.When periodically carrying out greatly alkali and water-refilling operation, a large amount of mothers of formation
Liquid is switched to mother liquor storage tank storage 33.Fresh lye is stored in the high storage tank 34 put, and flows into saturator 1 or mother liquor storage tank certainly
In 33.When mother liquor reaches certain saturation degree in saturator, into dense salt mother liquid disposal device 4.It is female with dense salt in the system
Dense salt mother liquor is pumped into crystallization tank 42 by liquid pump 41, and supernatant liquor is back to saturator in groove, and the mother liquor with crystallization flows into evaporation
Device 43 continues evaporation drying, the crystal relatively dried.
Optimize above-described embodiment, as shown in Figure 1, the evaporator is equipped with the steam inlet interconnected and steam (vapor) outlet,
The steam inlet is connected with low temperature exhaust heat blast-furnace equipment.The steam of low temperature exhaust heat blast-furnace equipment enters steam inlet, uses
The middle-low temperature heat in blast furnace region, crystallization is evaporated by the strong brine of saturation, completed in system coal gas depickling purification and
The function of environmental protection treatment strong brine, has the advantages that to take up an area province, efficient, energy conservation and environmental protection.
Strong brine crystallization treatment is carried out using the middle-low temperature heat in blast furnace region, avoids producing pollution source.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (8)
- A kind of 1. blast furnace gas saturator method cleaning system, it is characterised in that：Including saturator (1), coal gas mist eliminator (2), alkali Device (3) and dense salt mother liquid disposal device (4) are matched somebody with somebody in the storage of liquid mother liquor overflow, and saturator (1) upper end is equipped with gas inlet (11) With gas exit (12), the gas exit (12) is connected with coal gas mist eliminator (2) import (21), and the coal gas catches mist Device (2) bottom liquid stream exports (22) and stored up with the lye mother liquor overflow to be connected with device (3), and the coal gas mist eliminator (2) sets (23) can be exported as the purified gas that purified gas exports by having, and device (3) and the dense salt mother liquor are matched somebody with somebody in the lye mother liquor overflow storage Processing unit (4) is connected with the saturator (1).
- 2. blast furnace gas saturator method cleaning system as claimed in claim 1, it is characterised in that：The saturator (1) includes Concentric body (13) and inner draft tube (14), inner draft tube (14) bottom are connected with the body (13), described interior Guide shell (14) upper end is equipped with lye reflux inlet (16) and the gas inlet (11), and body (13) upper end is equipped with described Gas exit (12), body (13) bottom are equipped with lye pond, and lye pond upper end side wall is equipped with overflow port (17), described Body (13) lower end is equipped with circulating mother liquor entrance (15), crystalline mother solution outlet (18) and reflux mother liquor entrance (19), the lye Reflux inlet (16), circulating mother liquor entrance (15) and overflow port (17) are stored up with the lye mother liquor overflow to be connected with device (3) Logical, the crystalline mother solution outlet (18) and reflux mother liquor entrance (19) are connected with the dense salt mother liquid disposal device (4).
- 3. blast furnace gas saturator method cleaning system as claimed in claim 2, it is characterised in that：The inner draft tube (14) Gas inlet (11) place is equipped with entrance lye spray assemblies.
- 4. blast furnace gas saturator method cleaning system as claimed in claim 2, it is characterised in that：Bubble is equipped with the lye pond Umbrella (112) is boiled, the intumescence umbrella (112) is located at the underface of the inner draft tube (14).
- 5. blast furnace gas saturator method cleaning system as claimed in claim 2, it is characterised in that：The lye mother liquor overflow storage Circulating pump (31), overflow launder (32), mother liquor storage tank (33) and the lye height for including being sequentially communicated with device (3) put groove (34), institute State lye height and put the placing height of groove (34) higher than the mother liquor storage tank (33) and the placing height of the saturator (1), it is described Lye height puts groove (34) and is connected with the lye reflux inlet (16), the fluid outlet of coal gas mist eliminator (2) bottom (22) be connected with the overflow port (17) of the saturator (1) with the overflow launder (32), the circulating pump (31) with it is described Circulating mother liquor entrance (15) is connected.
- 6. blast furnace gas saturator method cleaning system as claimed in claim 2, it is characterised in that：The dense salt mother liquid disposal dress Put dense salt mother liquor pump (41), crystallization tank (42) and evaporator (43) that (4) include being sequentially communicated, the dense salt mother liquor pump (41) and The crystalline mother solution outlet (18) is connected, and the crystallization tank (42) is connected with the reflux mother liquor entrance (19), the steaming Hair device (43) top and bottom are respectively equipped with indirect steam outlet (431) and crystal outlet (432).
- 7. blast furnace gas saturator method cleaning system as claimed in claim 6, it is characterised in that：The evaporator (43) is equipped with The steam inlet interconnected and steam (vapor) outlet, the steam inlet are connected with low temperature exhaust heat blast-furnace equipment.
- 8. blast furnace gas saturator method cleaning system as claimed in claim 1, it is characterised in that：Below the saturator (1) Equipped with the stent (111) for being used to support the saturator (1).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107385129A (en) * | 2017-09-20 | 2017-11-24 | 中冶南方工程技术有限公司 | A kind of blast furnace gas saturator method cleaning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107385129A (en) * | 2017-09-20 | 2017-11-24 | 中冶南方工程技术有限公司 | A kind of blast furnace gas saturator method cleaning system |
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