CN202683037U - Desulphurization system for thermal power coal-fired unit with bypass and baffle - Google Patents
Desulphurization system for thermal power coal-fired unit with bypass and baffle Download PDFInfo
- Publication number
- CN202683037U CN202683037U CN 201220330857 CN201220330857U CN202683037U CN 202683037 U CN202683037 U CN 202683037U CN 201220330857 CN201220330857 CN 201220330857 CN 201220330857 U CN201220330857 U CN 201220330857U CN 202683037 U CN202683037 U CN 202683037U
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- China
- Prior art keywords
- booster fan
- desulphurization system
- flue
- air channel
- coal
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Abstract
The utility model relates to a desulphurization system for a thermal power coal-fired unit with a bypass and a baffle. The desulphurization system comprises a draught fan, a booster fan and a desulphurization adsorption tower, wherein the draught fan and the booster fan are connected by a first air flue; the booster fan and the desulphurization absorption tower are connected by a second air flue; the desulphurization system for the thermal power coal-fired unit further comprises a booster fan bypass flue connected with the booster fan in parallel, wherein one end of the booster fan bypass flue is communicated with the first air flue; the other end of the booster fan bypass flue is communicated with the second air flue; and a baffle for preventing the smoke from passing is arranged on the booster fan bypass flue; and the first air flue, the second air flue and the booster fan bypass flue are rigid air flues. With the adoption of the system, the resistance in a process that the smoke flows towards the desulphurization adsorption tower is overcome, the energy consumption and the operation cost of the desulphurization system for the thermal power coal-fired unit are reduced, and The desulphurization system has very great economic meaning.
Description
Technical field
The utility model is specifically related to increase the Coal-fired group desulphurization system of bypass and baffle plate.
Background technology
Existing Coal-fired group desulphurization system cigarette wind part basic comprising is that air-introduced machine adds the pressure fan pattern, booster fan claims again desulfurization blower fan (Boost Fan, BF) be used to overcoming FGD(flue gas desulfurization) device flue gas resistance, former flue gas is introduced desulphurization system, and the capital equipment of stable boiler induced-draft fan outlet pressure.Its operation characteristic low-head, large flow, the slow-speed of revolution.Installing additional in the situation of desulfurizer, the flue gas resistance that boiler send, air-introduced machine can't overcome FGD is so when boiler installs the FGD device additional, must arrange booster fan (BF).
In the wet desulfurizing process system, the flue gas that comes from boiler induced-draft fan enters washing desulphurization in the absorption tower, sends back-end ductwork back to and enter smoke stack emission after desulfurization.Because smoke gas flow need arrange the resistance that booster fan overcomes whole desulphurization system equipment through resistance devices such as former flue, flue gas heat-exchange unit (GGH), absorption tower, clean flue, baffle doors.The type selecting of desulfurization blower fan, position and structural shape etc. have considerable influence to cost, the optimization desulphurization system scheme that satisfies environmental requirement, reduction desulfurization project, are the visual plants that guarantees desulphurization system runnability and reliability.
That booster fan generally has is centrifugal, Blade Adjustable Axial streaming, three kinds of forms of stator blade adjustable shaft streaming.For the larger coal fired power generation unit of air-introduced machine design margin should calculate in detail original air-introduced machine exert oneself can overcome FGD(flue gas desulfurization) device flue gas resistance, and the accounting of the operating cost of later stage run duration, and then reduce to greatest extent investment cost and desulfurization power consumption.
Application number is a kind of flue gas desulfur device of the Chinese patent application of CN201120035765.0, comprise desulfuration absorbing tower, be communicated with the gas approach of desulfurizing absorption tower flue gas inlet and boiler induced-draft fan and be arranged at booster fan and booster fan shearing device on the gas approach, also comprise the bypass flue in parallel with booster fan and booster fan shearing device, bypass flue is provided with the bypass shearing device, one end of described bypass flue is communicated with desulfurizing absorption tower flue gas inlet, and the other end is communicated with boiler induced-draft fan; This utility model is provided with the bypass flue in parallel with booster fan, when boiler induced-draft fan surplus load reaches even be higher than booster fan design and operation load, can open bypass flue, cut off the path of booster fan, stop the booster fan operation, flue gas overcomes the desulfurizer flue gas resistance by bypass flue by boiler draft compressing head surplus, introduces desulfurizer.
Because negative pressure state often appears in the air-introduced machine outlet, so, mostly also need booster fan to carry out supercharging in the desulfurizer of the prior art, the application of the bypass flue in parallel with booster fan of setting up is very limited.
In view of this, special the utility model that proposes.
The utility model content
The purpose of this utility model is to provide a kind of Coal-fired group desulphurization system that increases bypass and baffle plate, this system has overcome the resistance of flue gas in flowing to the desulfuration absorbing tower process, reduce energy consumption and the operating cost of Coal-fired group desulphurization system, had very great economic implications.
In order to realize the purpose of this utility model, adopt following technical scheme:
Coal-fired group desulphurization system, comprise air-introduced machine, booster fan and desulfuration absorbing tower, described air-introduced machine is connected by the first air channel with booster fan, described booster fan is connected by the second air channel with desulfuration absorbing tower, described Coal-fired group desulphurization system also comprises the booster fan bypass flue in parallel with booster fan, one end of booster fan bypass flue is connected with the first air channel, the other end of booster fan bypass flue is connected with the second air channel, described booster fan bypass flue is provided with the baffle plate that stops flue gas to pass through, described the first air channel, the second air channel and booster fan bypass flue are the rigidity air channel.
Because flue gas must be through a plurality of resistance devices in flowing to the process of desulfuration absorbing tower, the resistance that booster fan overcomes whole desulphurization system equipment need be set, the utility model is the rigidity air channel by former air-introduced machine is exported transformation of air duct, the air-introduced machine outlet changes to barotropic state by negative pressure state after transforming, the booster fan bypass flue in parallel with booster fan is set in Coal-fired group desulphurization system, flue gas mainly flows to desulfuration absorbing tower by the booster fan bypass flue, flue gas through-current capacity and desulfuration efficiency all can satisfy actual motion and environmental protection needs after transforming, operational effect is good, reduced greatly the consumption of station service, and can not exert an influence to boiler operatiopn, when the air-introduced machine outlet is negative pressure state, can open the resistance that booster fan overcomes whole desulphurization system equipment.
Described rigidity air channel is for to establish arc sheetmetal at the groove of both ends open, and two limits of described arc sheetmetal are connected on the edge of two sidewalls of groove.
The width of described groove is 10-20cm, and the height of groove is 10-20cm.
Preferably, the width of described groove is 15cm, and the height of groove is 15cm.
The camber of described arc sheetmetal is not less than the distance between two sidewalls of groove.
Described arc sheetmetal is corrosion resistant plate, aluminium sheet.
Compared with prior art, the beneficial effects of the utility model are:
The Coal-fired group desulphurization system that the utility model provides is by arranging the booster fan bypass flue in parallel with booster fan, flue gas flows to desulfuration absorbing tower by the booster fan bypass flue, flue gas through-current capacity and desulfuration efficiency all can satisfy actual motion and environmental protection needs after transforming, operational effect is good, reduced greatly the consumption of station service, economic benefit is huge, is easy to promote.
Description of drawings
The schematic diagram of the Coal-fired group desulphurization system that Fig. 1 provides for the utility model.
Fig. 2 is the structure chart in rigidity of the present utility model air channel.
Wherein, 1. booster fan, 2. desulfuration absorbing tower, 3. arc sheetmetal, 4. sidewall, 5. the second air channel, 6. the first air channel, 7. air-introduced machine, 8. baffle plate, 9. booster fan bypass flue.
The specific embodiment
Such as Fig. 1, shown in Figure 2, Coal-fired group desulphurization system, comprise air-introduced machine 7, booster fan 1 and desulfuration absorbing tower 2, described air-introduced machine 7 is connected by the first air channel 6 with booster fan 1, described booster fan 1 is connected by the second air channel 5 with desulfuration absorbing tower 2, described Coal-fired group desulphurization system also comprises the booster fan bypass flue 9 in parallel with booster fan 1, one end of booster fan bypass flue 9 is connected with the first air channel 6, the other end of booster fan bypass flue 9 is connected with the second air channel 5, described booster fan bypass flue 9 is provided with the baffle plate 8 that stops flue gas to pass through, described the first air channel 6, the second air channel 5 and booster fan bypass flue 9 are the rigidity air channel.
Because flue gas must be through a plurality of resistance devices in flowing to the process of desulfuration absorbing tower, the resistance that booster fan overcomes whole desulphurization system equipment need be set, the utility model is the rigidity air channel by former air-introduced machine is exported transformation of air duct, the air-introduced machine outlet changes to barotropic state by negative pressure state after transforming, the booster fan bypass flue in parallel with booster fan is set in Coal-fired group desulphurization system, flue gas mainly flows to desulfuration absorbing tower by the booster fan bypass flue, flue gas through-current capacity and desulfuration efficiency all can satisfy actual motion and environmental protection needs after transforming, operational effect is good, reduced greatly the consumption of station service, and can not exert an influence to boiler operatiopn, when the air-introduced machine outlet is negative pressure state, can open the resistance that booster fan overcomes whole desulphurization system equipment.
Because general internal diameter of the pipeline is less, flue gas does not have the expansion space in pipeline when flue gas flow is large, and in the utility model, described rigidity air channel is for to establish arc sheetmetal 3 at the groove of both ends open, the width of groove is 10-20cm, the height of groove is 10-20cm, and the end face of groove is arc sheetmetal 3, and the space in the groove is larger, guaranteed that when flue gas flow is large flue gas has the expansion space, preferably, the width of described groove is 15cm, and the height of groove is 15cm; Two limits of described arc sheetmetal are connected on the edge of two sidewalls 4 of groove.
The camber of described arc sheetmetal is not less than the distance between two sidewalls of groove.
Described arc sheetmetal is corrosion resistant plate, aluminium sheet.
Different technologies feature of the present utility model use capable of being combined.
Claims (5)
1. increase the Coal-fired group desulphurization system of bypass and baffle plate, comprise air-introduced machine (7), booster fan (1) and desulfuration absorbing tower (2), described air-introduced machine (7) is connected by the first air channel (6) with booster fan (1), described booster fan (1) is connected by the second air channel (5) with desulfuration absorbing tower (2), it is characterized in that, described Coal-fired group desulphurization system also comprises the booster fan bypass flue (9) in parallel with booster fan, one end of booster fan bypass flue (9) is connected with the first air channel, the other end of booster fan bypass flue (9) is connected with the second air channel, described booster fan bypass flue is provided with the baffle plate (8) that stops flue gas to pass through, described the first air channel, the second air channel and booster fan bypass flue are the rigidity air channel.
2. Coal-fired group desulphurization system according to claim 1, it is characterized in that, described rigidity air channel is for to establish arc sheetmetal (3) at the groove of both ends open, and two limits of described arc sheetmetal are connected on the edge of two sidewalls (4) of groove.
3. Coal-fired group desulphurization system according to claim 2 is characterized in that, the width of described groove is 10-20cm, and the height of groove is 10-20cm.
4. Coal-fired group desulphurization system according to claim 3 is characterized in that, the width of described groove is 15cm, and the height of groove is 15cm.
5. Coal-fired group desulphurization system according to claim 2 is characterized in that, the camber of described arc sheetmetal is not less than the distance between two sidewalls of groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220330857 CN202683037U (en) | 2012-07-10 | 2012-07-10 | Desulphurization system for thermal power coal-fired unit with bypass and baffle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220330857 CN202683037U (en) | 2012-07-10 | 2012-07-10 | Desulphurization system for thermal power coal-fired unit with bypass and baffle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202683037U true CN202683037U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220330857 Expired - Lifetime CN202683037U (en) | 2012-07-10 | 2012-07-10 | Desulphurization system for thermal power coal-fired unit with bypass and baffle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202683037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521026A (en) * | 2013-09-27 | 2014-01-22 | 华电陕西能源有限公司 | Desulphurization boost fan system and control method thereof |
-
2012
- 2012-07-10 CN CN 201220330857 patent/CN202683037U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103521026A (en) * | 2013-09-27 | 2014-01-22 | 华电陕西能源有限公司 | Desulphurization boost fan system and control method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130123 |
|
| CX01 | Expiry of patent term |