CN202725021U - Low-energy consumption adjustable-load circulating fluidized bed desulfurizing tower - Google Patents

Low-energy consumption adjustable-load circulating fluidized bed desulfurizing tower Download PDF

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Publication number
CN202725021U
CN202725021U CN 201220343448 CN201220343448U CN202725021U CN 202725021 U CN202725021 U CN 202725021U CN 201220343448 CN201220343448 CN 201220343448 CN 201220343448 U CN201220343448 U CN 201220343448U CN 202725021 U CN202725021 U CN 202725021U
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China
Prior art keywords
tower
flue
energy consumption
flue gas
bypass
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CN 201220343448
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Chinese (zh)
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黄震
刘卫民
邵亚锋
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Jiangsu Jiaxin Environmental Protection Engineering Co. Ltd.
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NANJING LONGJIU ENVIRONMENTAL ENGINEERING Co Ltd
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Abstract

The utility model relates to a flue gas desulfurizing device, in particular to a low-energy consumption adjustable-load circulating fluidized bed desulfurizing tower which comprises a gas inlet flue, a throat pipe connected with the gas inlet tube, and a tower body, wherein the tower body is connected with the throat pipe and positioned at the top of the throat pipe, and at least one bypass pipe is communicated between the lower part of the throat pipe and the tower body. The desulfurizing tower can ensure that operating pressure loss of the empty tower is always stabilized within 300-400Pa under different operating loads. Due to elimination of a backflow flue, the investment is small compared with a clean flue gas backflow method, and flue gas is not required for being transported for long distance by using the method, thereby being small in energy consumption; the bypass flue is arranged not from a flue inlet to the upper part of a throat part, turns of the flue are fewer, the distance is further shortened, the flow direction of the flue gas has no sudden change, thereby being small in energy consumption. Flue gas passing the bypass pipe tangentially enters the tower, flow field in the reaction tower can be stabilized, the dwelling time of a desulfurizing agent is prolonged, thereby conducting desulfurization more efficiently; and the corners of the bypass flue are fewer, the appearance of the equipment is more attractive, the resistance is reduced, and the service life of the equipment can be prolonged.

Description

Low energy consumption load adjustable circular fluid-bed sweetening tower
Technical field
The utility model relates to a kind of flue gas desulfur device, specifically a kind of low energy consumption load adjustable circular fluid-bed sweetening tower.
Background technology
Owing to contain the pernicious gases such as sulfur dioxide, nitrogen oxide in the flue gas that produces when fire coal, fuel oil, fuel gas buring, these pernicious gases enter atmosphere, easily cause acid rain, destroy ecological environment, affect the healthy of people, the relevant environmental regulation of China has proposed strict control criterion requirement to the permission concentration of emission of sulfur dioxide in flue gas, nitrogen oxide.
The pollution that caused by coal burning control method has multiple, usually is divided three classes, i.e. and desulfurization (flue gas desulfurization) after desulfurization and the burning in desulfurization before the burning, the burning, wherein desulfurization is considered to control SO after the smoke combustion 2Pollute the most effective approach.The flue gas desulfurization technique that has been applied at present and has continued to develop mainly contains four kinds: humidification water activation method (LIFAC method) and recirculating fluidized bed flue gas purifying technique (CFB-FGD) behind Wet Limestone/gypsum absorption process, dry spraying dry decontamination technique, the in-furnace calcium spraying.
Recirculating fluidized bed flue gas purifying technique (CFB-FGD) is to add the Ca (OH) of reaction tower 2SO in powder and the flue gas 2And other compositions such as SO in the flue gas 3, the sour gas such as HCl, HF fully contact mixing, the atomized water that the reaction tower porch sprays into reduces flue-gas temperature on the one hand, guarantees optimum reaction condition, on the other hand at Ca (OH) 2The surface of particle forms liquid phase, so that in the reaction tower that the soda acid amphiprotic substance mixes, reaction can be fully, carry out fast.In the recirculating fluidized bed reaction tower, Ca (OH) 2Powder, flue gas and the moisture that sprays into fully mix under fluidized state, and by Ca (OH) 2The repeatedly recirculation of powder is so that participate in the Ca (OH) of reaction in the bed 2Amount is far longer than the Ca (OH) that newly adds 2Amount, namely the Ca/S of real reaction ratio is far longer than apparent Ca/S ratio, thereby makes SO 2, SO 3Absorbed more fully Deng the sour gas physical efficiency, realized the efficient utilization of high-efficiency desulfurization and desulfurizing agent.
But there is following problem in existing recirculating fluidized bed reaction tower: the reaction tower that designs at full capacity by boiler is when larger exhaust gas volumn load variations, and crushing changes greatly in the reaction tower, affects desulphurization system and normally moves, and affects desulfurized effect.Because during the design reaction tower, the pressure loss in the time of should guaranteeing at full capacity void tower operation in the tower is 300~400Pa, but when flue gas flow in the tower becomes underload by full load, flow velocity diminishes in the tower, the pressure loss reduces, and when being low to moderate 300Pa when following, the anti-material ash that is come by deduster no longer is in fluidized state, thereby cause desulfurizing agent fully not contact with flue gas, desulfurized effect reduces.
When for this problem following two kinds of solution: ⑴ design being arranged at present, for guaranteeing that reaction tower is in minimum load operation, dwindle reaction tower trunnion section diameter, so that during underrun, reaction tower void tower crushing reaches 300~400Pa, when the reaction tower oepration at full load, reaction tower void tower crushing can reach more than 1000 Pa like this; ⑵ cleaning flue gases circumfluence method was established pipeline and is connected to the reaction tower import before chimney, mounted valve on the pipeline, and during the reaction tower oepration at full load, valve-off; During underrun, open valve, with cleaning flue gases with enter reaction tower after pending flue gas mixes, guarantee like this in the tower that flue gas load is at full capacity.All there is shortcoming separately in these two kinds of solutions: the first scheme is because the reaction tower internal pressure loss is larger, and power consumption is large; The first scheme investment is larger, and cleaning flue gases carries power consumption large.This shows there is not a kind of circulating fluidized bed desulfurization tower that can guarantee that desulfuration efficiency can be saved energy and reduce the cost again in the prior art.
Number of patent application is: 200820040397.7 Chinese patent, a kind of load adjustable circular fluid-bed sweetening tower is disclosed, and between air inlet flue and tower body, be connected to bypass duct, the loss of void tower operating pressure reduces, more high-efficiency desulfurization; But this technology is reducing to still have improved space aspect the loss of void tower operating pressure and the reduction energy consumption.
The utility model content
Technical problem to be solved in the utility model is, overcomes the shortcoming of prior art, proposes a kind of low energy consumption load adjustable circular fluid-bed sweetening tower, and the loss of void tower operating pressure further reduces, and energy consumption is lower.
The technical scheme that the utility model solves above technical problem is:
Low energy consumption load adjustable circular fluid-bed sweetening tower comprises the air inlet flue, the trunnion that links to each other with the air inlet flue, and link to each other with trunnion and be positioned at tower body above the trunnion, be communicated with between trunnion bottom and the described tower body and be connected at least one bypass duct.
Be understood that, after the employing technique scheme, when the circulating fluidized bed desulfurization tower higher load is moved, partial fume directly can be crossed the trunnion position by bypass duct and enter tower body.When the circulating fluidized bed desulfurization tower oepration at full load, a plurality of bypass ducts all can be opened; During underrun, can be with the bypass duct Close All; During the shoulder load operation, press the bypass duct number that flow is determined unlatching, thereby reach the reduction pressure loss, guarantee the purpose that desulfurized effect is saved energy and reduce the cost again.When adopting the technical program, desulfurizing tower is pressed the minimum load design.
The technical scheme that the utility model further limits is:
Aforesaid low energy consumption load adjustable circular fluid-bed sweetening tower, the outlet of bypass duct tangentially enters in the described tower body.
Aforesaid low energy consumption load adjustable circular fluid-bed sweetening tower, bypass duct is helical form.
Aforesaid low energy consumption load adjustable circular fluid-bed sweetening tower, the outlet of bypass duct is communicated with described tower body bottom.
Aforesaid low energy consumption load adjustable circular fluid-bed sweetening tower, bypass duct is provided with four.
The beneficial effects of the utility model are: ⑴ has been owing to increased bypass duct, and bypass duct opens adjustablely, can guarantee under the different operating loads that the void tower operating pressure loses all-the-time stable at 300~400Pa, and the pressure loss is less, and energy consumption is lower; ⑵ because the flue that need not reflux is less than the investment of cleaning flue gases circumfluence method, and this method flue gas need not pass through long-distance transportation, and it is little to consume energy; ⑶ tangentially enter in the tower through the flue gas of bypass duct, can stablize the reaction tower flow field, the prolongation desulfurizing agent time of staying, thereby high-efficiency desulfurization more; ⑷ resistance can increase the range of operation of desulfurizing tower according to the different load adjustment, has improved the adaptability of circulating fluidized bed dry sulfur removal technology to load.(5) because bypass flue is not got gas from inlet flue duct, and flue is got gas apart from weak point than from inlet flue duct, and the flue number of times that turns round reduces, and energy consumption is low, and flue weares and teares and reduces.
Description of drawings
Fig. 1 is planar structure schematic diagram of the present utility model.
Fig. 2 is an elevation of the present utility model.
The specific embodiment
Embodiment 1
Present embodiment provides a kind of low energy consumption load adjustable circular fluid-bed sweetening tower, planar structure as shown in Figure 1, Fig. 2 is an one elevation, comprise air inlet flue 1, the trunnion 2 that links to each other with the air inlet flue, and the tower body 3 that links to each other with trunnion and be positioned at trunnion top, be communicated with between trunnion 2 bottoms and the tower body and be connected at least one bypass duct 4.Present embodiment bypass duct 4 is provided with four, is helical form, and the outlet of bypass duct 4 tangentially enters in the tower body, and the outlet of bypass duct 4 is communicated with the tower body bottom.Be the outlet and 3 tangent connections of tower body of bypass duct 4.Flue gas through bypass duct 4 tangentially enters in the tower body 3, can stablize the reaction tower flow field, prolongs the desulfurizing agent time of staying, more high-efficiency desulfurization.
When concrete the use, when the circulating fluidized bed desulfurization tower oepration at full load, bypass duct 4 all can be opened, partial fume is directly crossed trunnion 2 positions by bypass duct 4 enter tower body 3, make void tower operating pressure loss all-the-time stable at 400~500Pa.When the circulating fluidized bed desulfurization tower underrun, can with bypass duct 4 Close Alls, make void tower operating pressure loss all-the-time stable at 400~500Pa.When the circulating fluidized bed desulfurization tower shoulder load moves, press the number of the bypass duct 4 that flow determine to open, can open one, two or three, make void tower operating pressure loss all-the-time stable 300~400Pa.
Because the flue that need not reflux is less than the investment of cleaning flue gases circumfluence method, and this method flue gas need not pass through long-distance transportation, and it is little to consume energy; Because the top does not arrange bypass flue from flue entrance to throat, flue turns round less, and distance further shortens, and flue gas flow direction is without sudden change, and it is little to consume energy.Tangentially enter in the tower through the flue gas of bypass duct, can stablize the reaction tower flow field, the prolongation desulfurizing agent time of staying, thereby high-efficiency desulfurization more; Reduce at the bypass flue turning, and the equipment appearance is more attractive in appearance, and resistance reduces, extension device service life.
In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.

Claims (5)

1. low energy consumption load adjustable circular fluid-bed sweetening tower, comprise air inlet flue (1), the trunnion (2) that links to each other with the air inlet flue, and the tower body (3) that links to each other with trunnion and be positioned at trunnion top, it is characterized in that: be communicated with between described trunnion (2) bottom and the described tower body and be connected at least one bypass duct (4).
2. low energy consumption as claimed in claim 1 load adjustable circular fluid-bed sweetening tower, it is characterized in that: the outlet of described bypass duct (4) tangentially enters in the described tower body.
3. low energy consumption as claimed in claim 1 or 2 load adjustable circular fluid-bed sweetening tower, it is characterized in that: described bypass duct (4) is helical form.
4. low energy consumption as claimed in claim 1 or 2 load adjustable circular fluid-bed sweetening tower, it is characterized in that: the outlet of described bypass duct (4) is communicated with described tower body bottom.
5. low energy consumption as claimed in claim 1 or 2 load adjustable circular fluid-bed sweetening tower, it is characterized in that: described bypass duct (4) is provided with four.
CN 201220343448 2012-07-16 2012-07-16 Low-energy consumption adjustable-load circulating fluidized bed desulfurizing tower Active CN202725021U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102743973A (en) * 2012-07-16 2012-10-24 南京龙玖环境工程有限公司 Low-energy load-adjustable circulating fluidized bed desulfurization tower
CN108579398A (en) * 2018-05-21 2018-09-28 山东先进能源科技有限公司 A kind of fume desulphurization method, flue gas desulfurization device and flue gas desulphurization system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102743973A (en) * 2012-07-16 2012-10-24 南京龙玖环境工程有限公司 Low-energy load-adjustable circulating fluidized bed desulfurization tower
CN108579398A (en) * 2018-05-21 2018-09-28 山东先进能源科技有限公司 A kind of fume desulphurization method, flue gas desulfurization device and flue gas desulphurization system

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C41 Transfer of patent application or patent right or utility model
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Effective date of registration: 20170301

Address after: New new town road Yangzhong city 212211 Jiangsu city of Zhenjiang province No. 1

Patentee after: Jiangsu Jiaxin Environmental Protection Engineering Co. Ltd.

Address before: 210029 Nanjing Central Road, Jiangsu, Jin Feng building, room 2602, room 19

Patentee before: Nanjing Longjiu Environmental Engineering Co., Ltd.