CN209221801U - A kind of desulphurization system - Google Patents
A kind of desulphurization system Download PDFInfo
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- CN209221801U CN209221801U CN201821806960.7U CN201821806960U CN209221801U CN 209221801 U CN209221801 U CN 209221801U CN 201821806960 U CN201821806960 U CN 201821806960U CN 209221801 U CN209221801 U CN 209221801U
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- gas
- heat exchanger
- tube type
- desulfurization
- flue gas
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a kind of desulphurization system, including gas heat exchanger, desulfurizer, gas-liquid fin-tube type heat exchanger and demister, wherein, the inlet end of the gas outlet connection desulfurizer of the gas heat exchanger cold side channel, the air inlet in the outlet side connection gas-liquid fin-tube type heat exchanger fume side channel of desulfurizer, the air inlet of the gas outlet connection demister in gas-liquid fin-tube type heat exchanger fume side channel, the air inlet of the gas outlet connection gas heat exchanger hot-side channel of demister.The utility model can fundamentally reduce the moisture in flue gas to be discharged, effective solution white haze problem；The waste heat in pre- desulfurization fume, energy saving, optimization wet desulfurizing process can be utilized again.
Description
Technical field
The utility model relates to desulfurization fume Treatment process fields, specially a kind of to be based on gas heat exchanger and gas-liquid pipe wing
The combination of formula heat exchanger can solve desulfurization fume and take off white desulphurization system.
Background technique
Currently, being assembled with flue gas desulfurization before most of fuel flue gas emissions as country is higher and higher to environmental requirement
System, in the flue gas desulphurization system that the country uses, due to Wet Flue Gas Desulfurization Technique maturation, desulfuration efficiency is high, and what is largely used is wet
Method desulfurization.But for the desulfurization effect for guaranteeing flue gas, pre- desulfurization fume will first carry out cooling processing, tradition side before entering desulfurizing tower
Method only considers flue gas desulfurization, is not utilized rationally to heat entrained by flue gas.In addition, the cigarette of wet desulphurization device outlet
Gas is substantially at 50 DEG C~65 DEG C, and moisture is close to saturation state in flue gas, and after flue gas direct emission, temperature is reduced rapidly, to the cold fastly
Rapid hardening knot forms " white haze " phenomenon around chimney breast, it is not only a kind of visual pollution, it is also possible to because containing pollutant
Condensed water drop to around outlet and cause that resident's is discontented.
For " white haze " phenomenon of wet desulfurization flue gas discharge outlet, cigarette is mainly installed additional at chimney using method at present
Gas reheat system, flue gas reheat system need to expend energy, and device can not fundamentally be solved white haze and asked by flue gas corrosion
Topic, though other methods have improvement, there is also many shortcomings.
Such as the utility application of 108310794 A of Publication No. CN, it discloses one kind and removes smoke discharge outlet
The method of white haze steam is first precipitated moisture with condensate liquid spray flue gas, is re-introduced into the method that steam or hot water heat up flue gas,
Although the method can eliminate white haze, higher using condensing tower spraying cooling O&M cost, equipment space occupied is larger, also needs
Increase the equipment for preparing condensate liquid, and prepare condensate liquid energy consumption height, water consumption is also big, in addition, it is also necessary to introduce heating device
Flue gas is heated, energy consumption is more significantly.
In another example the utility application of 107570008 A of Publication No. CN, discloses a kind of suitable for coking cigarette
The coking flue-gas temperature of high temperature is reduced to suitable temperature range by gas-gas heat exchanger by the desulphurization system of gas, this method, is led to
Gas-gas heat exchanger to be crossed to heat the flue gas that desulfurizing tower comes out, flue gas discharges more than dew-point temperature, it not will form white haze, but
The method belongs to the technological transformation before wet desulphurization, and tail portion does not reduce the water capacity in flue gas to be discharged, and flue gas to be discharged
The middle condensed water that may contain pollutant drops to ground, without fundamentally solving the problems, such as white haze；Secondly flue gas to be desulfurization enters
Two equipment of gas-gas heat exchanger and plate heat exchanger are arranged before desulfurizing tower, occupied area and O&M cost increase.
White new method is taken off therefore, it is necessary to find one kind and simply and effectively solve desulfurization fume, using less energy consumption
It just can effectively solve " white haze " this visual pollution with lower cost.
Utility model content
The purpose of this utility model is that overcoming the deficiencies of the prior art and provide a kind of solution desulfurization fume takes off white side
Method and desulphurization system are combined based on gas heat exchanger and gas-liquid pipe fin heat exchanger, can fundamentally reduce flue gas to be discharged
In moisture, effective solution white haze problem；The waste heat in pre- desulfurization fume, energy saving, optimization wet desulphurization can be utilized again
Technique.
To solve the above problems, the utility model discloses a kind of desulphurization system, including gas heat exchanger, desulfurizer, gas
Liquid pipe fin heat exchanger and demister, wherein the gas heat exchanger cold side channel gas outlet connection desulfurizer into
Gas end, the air inlet in the outlet side connection gas-liquid fin-tube type heat exchanger fume side channel of desulfurizer, gas-liquid fin-tube type heat exchanger
The air inlet of the gas outlet connection demister of flue gas wing passage, the gas outlet of demister connects gas heat exchanger hot-side channel
Air inlet.
As a preferred embodiment, the gas heat exchanger is gas plate heat exchanger.
As a preferred embodiment, the finned tube in the gas-liquid fin-tube type heat exchanger is rush-resisting material.
As a preferred embodiment, the demister is mesh mist eliminator.
As a preferred embodiment, which further includes being connect with the water wing passage of gas-liquid fin-tube type heat exchanger for mentioning
For the cooling tower of recirculated cooling water.
The utility model has the advantages that
(1) using the flue gas desulfurization of pre- desulfurization, the flue gas of condensation demisting, belong to UTILIZATION OF VESIDUAL HEAT IN, energy saving reduces
Moisture relative humidity in flue gas effectively solves the problems, such as white haze.
(2) pre- desulfurization fume into before desulfurizing tower temperature-fall period and desulfurization, condensation flue gas emission before need to rise again
Warm process concentrates in a gas heat exchanger carrying out, and carries out UTILIZATION OF VESIDUAL HEAT IN, the unused thermal energy benefit of pre- desulfurization fume cooling
With on flue gas to be discharged, energy saving reduces equipment occupation space, while it is relatively wet to also reduce the moisture in flue gas
Degree.
(3) it using most moisture in gas-liquid fin-tube type heat exchanger condensation flue gas, greatly reduces to be discharged
Water capacity in flue gas fundamentally solves the problems, such as the white haze of desulfurization fume.
(4) simple process, operating cost is low, is conducive to improve existing wet desulfurization system, to optimize desulfurization cigarette
Gas discharge reduces white haze pollution.
Detailed description of the invention
Fig. 1 is desulphurization system schematic diagram described in embodiment；
Attached drawing mark: 1- gas heat exchanger, 2- desulfurizing tower, 3- gas-liquid fin-tube type heat exchanger, 4- cooling tower, 5- demisting
Device.
Specific embodiment
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, below just in conjunction with 1 pair of sheet of attached drawing
The embodiment of utility model is described in detail, to facilitate the technical staff to understand.
As shown in connection with fig. 1, embodiment discloses a kind of desulphurization system, including is sequentially connected gas heat exchanger 1 by pipeline, takes off
Sulphur tower 2, gas-liquid fin-tube type heat exchanger 3, demister 5, and the cooling tower 4 being connect with 3 water side of gas-liquid fin-tube type heat exchanger,
In, the exhanst gas outlet of demister 5 is connected with the cold side import of gas heat exchanger 1, and in gas-liquid fin-tube type heat exchanger 3, water walks wing
In piece pipe, flue gas is walked outside pipe.
The preferred gas plate heat exchanger of gas heat exchanger 1, material selection corrosion-resistant stainless steel or plus corrosion-inhibiting coating.Relatively
In tubular heat exchanger, gas plate heat exchanger high, compact-sized, low power consumption and other advantages with heat transfer efficiency are more advantageous to remaining
Heat makes full use of.
For the sulfur method that desulfurizing tower 2 uses for wet desulphurization, wet desulphurization has technology maturation, desulfuration efficiency height, reaction
The advantages that speed is fast.
Finned tube in gas-liquid fin-tube type heat exchanger 3 selects rush-resisting material, such as the finned tube, 316 stainless of steel combined with aluminum
Steel high frequency welded fin-tube etc. has good rust-proof effect.
Moisture in cooling tower 4 is recirculated water, and floating ball moisturizing can be used, and liquid level is lower than certain liquid level, and ball-cock assembly is opened
Automatic water supplement does not have to frequent moisturizing.The moisture loss of cooling tower 4 is mainly evaporation loss, spatter loss, periodically draining loss
Deng accounting for about the 0.5-2% of global cycle water.The moisture that flue gas condensing is precipitated is relatively more, moreover it is possible to recycle.
It should be noted that the water side of gas-liquid fin-tube type heat exchanger 3 can also be directly connected to liquid coolant sources, for example, can be straight
The cooling waste water for meeting introducing plant area is recycled.
Fiber mist eliminator and deflector type demister, preferably mesh mist eliminator can be used in demister 5, can effectively collect flue gas
In the vapor and pollutant mist that are mingled with, realize gas-liquid separation, reduce the content of the carrying vapor in flue gas.
When normal operation, pre- desulfurization fume enters gas heat exchanger 1 from the hot side import of gas heat exchanger 1, changes in gas
Hot device carries out heat exchange, and the pre- desulfurization fume after cooling enters desulfurizing tower 2 from the hot side outlet of gas heat exchanger 1, through desulfurizing tower 2
Flue gas after desulfurization enters the fume side of gas-liquid fin-tube type heat exchanger 3, the flue gas after desulfurization by water flank into circulating cooling liquid
Condensation, desulfurization, condensed flue gas enter 5 demisting of demister, the desulfurization fume to be discharged after desulfurization, condensation and demisting again into
The cold side import for entering gas heat exchanger 1, in gas heat exchanger, desulfurization fume to be discharged is realized after heat exchange heating takes off white row
It puts.
The desulphurization system based on the above embodiment, can solve desulfurization fume take off it is white, specifically includes the following steps:
1) by the hot-side channel of pre- desulfurization fume access gas heat exchanger 1, pre- desulfurization fume and desulfurization to be discharged are realized
The heat exchange of flue gas makes pre- desulfurization fume cool down using pre- desulfurization fume heat desulfurization, condensed flue gas, to realize
The UTILIZATION OF VESIDUAL HEAT IN of pre- desulfurization fume.
2) the pre- desulfurization fume access desulfurizing tower 2 after cooling is subjected to wet desulphurization, the desulfurization fume come out from desulfurizing tower
Temperature is at 50 DEG C~65 DEG C.
3) desulfurization fume is introduced into gas-liquid fin-tube type heat exchanger 3, is carried out by the recirculated cooling water in cooling tower 4 cold
It is solidifying, desulfurization, condensation flue gas exit temperature control at 40 DEG C~45 DEG C, in desulfurization fume 50% or more moisture is precipitated, reduces
The water capacity of desulfurization fume.
4) condensed desulfurization fume is introduced into demister 5, to remove the droplet carried secretly after desulfurization, condensation in flue gas.
5) flue gas of desulfurization, condensation and demisting is introduced into the cold side channel of gas heat exchanger 1 and is heated up again, make flue gas
The relative humidity of middle vapor reaches 20% hereinafter, vapor discharges after becoming unsaturated state by saturated mode in flue gas, to have
Effect eliminates the generation of white haze.
Wherein, desulfurization fume condenses preferred water-cooling method, because the latent heat for the water that desulfurization fume is condensed out is bigger, if choosing
With air-cooled, not only equipment volume is big, takes up a large area.According to cooling tower, circulation moisture loss is few, does not need often to mend
Water carries out desulfurization fume condensation by recirculated water, moreover it is possible to which the condensed water being precipitated in recovered flue gas saves water resource.Certainly, herein
It can also be condensed using other liquid, for example, ethylene glycol, propyl alcohol, refrigerant etc. can be used as condensate liquid.
In addition, it should be noted that for guarantee desulfurization efficiency, be typically necessary enter desulfurizing tower before pre- desulfurization fume
Temperature reduces.The sulfur-containing smoke gas start temperature ranges that different process generates are larger, differ at 130-250 DEG C, and enter desulfurizing tower
Preceding temperature, which is typically necessary, drops to 90-95 DEG C or so.The cooling of pre- desulfurization fume is on the one hand realized by gas heat exchanger, separately
On the one hand waste heat is recycled, for heating flue gas to be discharged, effectively reduces the relative humidity of flue gas to be discharged, make to
The flue gas of discharge discharges in dew-point temperature, advantageously accounts for white haze problem.
One group of specific experimental data is given below.
One flow is 80000Nm3/ h, 140 DEG C of pre- desulfurization fume reach 94 DEG C by gas heat exchanger heat exchange cooling,
Wherein, gas heat exchanger is gas plate heat exchanger, heat exchange area 550m2；94 DEG C of pre- desulfurization fume enter desulfurizing tower into
Row reaction desulfuration, the desulfurization fume of desulfurizing tower outlet are 55 DEG C, water capacity 115.3g/kg；Flow 80000Nm3The desulfurization of/h
Flue gas enters gas-liquid fin-tube type heat exchanger, and the area of gas-liquid fin-tube type heat exchanger is 990m2, the quantity of circulating water of cooling tower is
74t/h, 30 DEG C into 35 DEG C go out, and desulfurization fume drops to 40 DEG C, and water capacity becomes 49.1g/kg condensed water is precipitated being about 686kg, about
In desulfurization fume 58% moisture is removed；Then with the drop and grit in flue gas after mesh mist eliminator removing desulfurization, condensation
Deng；The flue gas of desulfurization, condensation and demisting is finally accessed into gas heat exchanger, 85 DEG C is warming up to by heat exchange, discharges water in flue gas
The relative humidity divided drops to 7%, and the effect for removing white haze is fully achieved.
Although the embodiments of the present invention are described in conjunction with attached drawing above, the utility model does not limit to
In above-mentioned specific embodiments and applications field, above-mentioned specific embodiment is only schematical, directiveness, without
It is restrictive.Those skilled in the art under the enlightenment of this specification, are not departing from the utility model claims
In the case where the range protected, a variety of forms can also be made, these belong to the column of the utility model protection.
Claims (5)
1. a kind of desulphurization system, which is characterized in that including gas heat exchanger, desulfurizer, gas-liquid fin-tube type heat exchanger and demisting
Device, wherein the inlet end of the gas outlet connection desulfurizer of the gas heat exchanger cold side channel, the outlet side of desulfurizer
Connect the air inlet in gas-liquid fin-tube type heat exchanger fume side channel, the gas outlet connection in gas-liquid fin-tube type heat exchanger fume side channel
The air inlet of demister, the air inlet of the gas outlet connection gas heat exchanger hot-side channel of demister.
2. desulphurization system according to claim 1, it is characterised in that: the gas heat exchanger is gas plate heat exchanger.
3. desulphurization system according to claim 1, it is characterised in that: the finned tube in the gas-liquid fin-tube type heat exchanger is
Rush-resisting material.
4. desulphurization system according to claim 1, it is characterised in that: the demister is mesh mist eliminator.
5. desulphurization system according to any one of claims 1 to 4, it is characterised in that: further include being changed with gas-liquid fin-tube type
The water wing passage connection of hot device is used to provide the cooling tower of recirculated cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821806960.7U CN209221801U (en) | 2018-11-05 | 2018-11-05 | A kind of desulphurization system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821806960.7U CN209221801U (en) | 2018-11-05 | 2018-11-05 | A kind of desulphurization system |
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| Publication Number | Publication Date |
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| CN209221801U true CN209221801U (en) | 2019-08-09 |
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| CN201821806960.7U Active CN209221801U (en) | 2018-11-05 | 2018-11-05 | A kind of desulphurization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107328A (en) * | 2018-11-05 | 2019-01-01 | 南京普兰特换热设备有限公司 | It solves desulfurization fume and takes off white method and desulphurization system |
-
2018
- 2018-11-05 CN CN201821806960.7U patent/CN209221801U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109107328A (en) * | 2018-11-05 | 2019-01-01 | 南京普兰特换热设备有限公司 | It solves desulfurization fume and takes off white method and desulphurization system |
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