CN211753775U - Flue gas circulating desulfurization device - Google Patents
Flue gas circulating desulfurization device Download PDFInfo
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- CN211753775U CN211753775U CN202020031748.9U CN202020031748U CN211753775U CN 211753775 U CN211753775 U CN 211753775U CN 202020031748 U CN202020031748 U CN 202020031748U CN 211753775 U CN211753775 U CN 211753775U
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Abstract
The utility model provides a flue gas circulation desulphurization unit, be used for getting rid of the sulphur in the industrial flue gas, flue gas circulation desulphurization unit includes that the venturi goes into the gas device, the desulfurizing tower that the entry is connected with the venturi income gas device, the particulate matter returning device who sets up on the desulfurizing tower top, the dust remover that is connected with the desulfurizing tower export, flue gas backflow pipeline, the venturi goes into the gas device and includes the divergent pipe of being connected with the desulfurizing tower, the choke that desulfurizing tower one end was kept away from in the divergent pipe is set up, the convergent pipe of divergent pipe one end is kept away from in the choke, flue gas backflow pipeline connects desulfurizing tower export and venturi income gas device's choke. The utility model discloses a flue gas circulation desulphurization unit is through setting up venturi income gas device and flue gas backflow pipeline, can utilize the backward flow of pressure differential control flue gas, and unnecessary extra consumption energy increases the contact time of flue gas and desulfurizer, improves the desulfurization efficiency of flue gas, reduces the loss and the use energy consumption of dust remover sack simultaneously for exhaust flue gas sulfur content is low and the energy consumption is lower.
Description
Technical Field
The utility model relates to a flue gas circulation desulphurization unit.
Background
The existing dry desulfurization system of the circulating fluidized bed comprises a slaked lime bin, a dry desulfurization tower, a cloth bag or an electric dust collector, a desulfurization slag bin and other equipment, firstly, slaked lime serving as a desulfurizing agent is poured into the slaked lime bin, then, the slaked lime is sprayed into the dry desulfurization tower, finally, the slaked lime is captured by the dust collector at the rear end, and part of materials captured by the slaked lime is returned to the dry desulfurization tower through a return chute so that the desulfurizing agent is recycled.
In order to achieve the desulfurization efficiency, the height of the dry desulfurization tower is often very high, and the speed of the flue gas is often very high after the flue gas is accelerated through the venturi tube at the lower end, so that the tower body is very high in order to ensure the reaction time, and meanwhile, a part of desulfurizer enters the dust remover at the rear end, so that the load of the dust remover at the rear end is increased, the energy consumption and the abrasion of equipment are increased, and particularly, a material returning chute at the outlet of the dust remover is very easy to block.
In view of the above, there is a need for an improved flue gas desulfurization apparatus to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a flue gas circulation desulphurization unit to solve the problem that current flue gas desulphurization unit desulfurization is not thorough, the power consumption is higher.
In order to realize the above object, the utility model provides a flue gas circulation desulphurization unit for get rid of the sulphur in the industrial flue gas, flue gas circulation desulphurization unit include the venturi go into gas device, entry and the desulfurizing tower that the venturi goes into gas device and is connected, set up be in the particulate matter return means on desulfurizing tower top, with dust remover, the flue gas backflow pipeline that the desulfurizing tower export is connected, the venturi go into gas device include with divergent pipe, setting that the desulfurizing tower is connected are kept away from at divergent pipe the choke, the setting of desulfurizing tower one end are in the choke is kept away from the convergent pipe of divergent pipe one end, flue gas backflow pipeline connects the desulfurizing tower export is gone into the choke of gas device with the venturi.
As a further improvement of the utility model, a valve for controlling the flow of the flue gas is arranged in the flue gas backflow pipeline.
As a further improvement of the utility model, the valve is an electric valve.
As a further improvement of the utility model, a sulfur content detection device is installed at the outlet of the desulfurizing tower.
As a further improvement of the present invention, the flue gas circulating desulfurization device further includes a control unit, the control unit is interlocked with the sulfur content detection device and the electric valve.
The utility model has the advantages that: the utility model discloses a flue gas circulating desulfurization device, through setting up venturi income gas device and flue gas backflow pipeline, can utilize the backward flow of pressure differential control flue gas, unnecessary extra consumption energy, particulate matter returning device through the desulfurizing tower top simultaneously collects unreacted desulfurizer, increases the contact time of flue gas and desulfurizer, improves the desulfurization efficiency of flue gas, increases the life of dust remover simultaneously and has reduced the energy consumption.
Drawings
Fig. 1 is a schematic structural diagram of the flue gas circulation desulfurization device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in figure 1, the flue gas circulating desulfurization device of the utility model is used for removing sulfur in industrial flue gas. Flue gas circulation desulphurization unit include venturi income gas device 1, the entry with desulfurizing tower 2 that venturi income gas device 1 is connected, set up and be in the particulate matter return device 7 on 2 tops of desulfurizing tower, with dust remover 3, flue gas backflow pipeline 4, desulfurization sediment storehouse 5, slaked lime storehouse 6, the control unit that the 2 exports of desulfurizing tower are connected.
The slaked lime bin 6 is used for providing slaked lime for the desulfurization tower 2, and the slaked lime bin 6 is connected with the desulfurization tower 2. In this embodiment, the slaked lime functions as a desulfurizing agent to react with sulfides in the flue gas to remove sulfur in the flue gas.
The desulfurization slag bin 5 is connected with the dust remover 3, the dust remover 3 separates the desulfurization slag generated after absorbing sulfide into the desulfurization slag bin 5, and the treated flue gas is clean flue gas.
The venturi gas inlet device 1 comprises a divergent pipe 11 connected with the desulfurizing tower 2, a throat pipe 12 arranged at one end of the divergent pipe 11 far away from the desulfurizing tower 2, and a convergent pipe 13 arranged at one end of the throat pipe 12 far away from the divergent pipe 11. Therefore, the diameter of the Venturi gas inlet device 1 is firstly reduced and then enlarged, and the diameter of the Venturi gas inlet device at the throat 12 is the smallest, so that the flow speed of the flue gas at the throat 12 is the fastest, and the gas pressure is the lowest.
The flue gas reflux pipeline 4 is connected with the outlet of the desulfurizing tower 2 and the throat 12 of the Venturi gas inlet device 1. A valve 41 for controlling the flow of the flue gas is arranged in the flue gas return pipeline 4. In this embodiment, the venturi inlet device 1 has the lowest air pressure at the throat 12, and the relative air pressure in the desulfurizing tower 2 is higher, and the valve 41 is opened, so that the flue gas close to the outlet of the desulfurizing tower 2 can be introduced into the throat 12 under the action of the pressure difference, and then enters the desulfurizing tower 2 again, so that the flue gas enters the desulfurizing tower 2 again for reaction, thereby improving the desulfurizing efficiency, and meanwhile, the particulate matter returning device 7 collects the incompletely reacted particulate desulfurizing agent at the top end and returns the incompletely reacted particulate desulfurizing agent to the desulfurizing tower 2 for reaction again, thereby improving the utilization rate of the desulfurizing agent.
The valve 41 is an electric valve, a sulfur content detection device is arranged at the outlet of the desulfurizing tower 2, and the control unit is interlocked with the sulfur content detection device and the electric valve.
The application method of the flue gas circulating desulfurization device of the embodiment is as follows: pouring slaked lime into a slaked lime bin 6; spraying the slaked lime in the slaked lime bin 6 into the desulfurizing tower 2; the industrial flue gas is accelerated by the Venturi gas inlet device 1 and then is guided into the desulfurizing tower 2, and is subjected to desulfurization reaction with slaked lime in the desulfurizing tower 2, and part of unreacted slaked lime particles return to the desulfurizing tower 2 through a particle return device 7 arranged at the top of the desulfurizing tower 2 to participate in the reaction again; the sulfur content detection device detects the sulfur content of the flue gas in the desulfurizing tower 2 and transmits the sulfur content to the control unit; the control unit detects that if the sulfur content of the flue gas is higher than a set value, the desulfurization is judged to be insufficient, the valve 41 is controlled to be opened, and the flue gas is reintroduced into the Venturi gas inlet device 1 and enters the desulfurization tower 2 for reaction again; if the detected sulfur content is lower than the set value, the desulfurization is judged to be finished, and the flue gas is discharged into the atmosphere or other devices for further treatment.
The utility model discloses a flue gas circulating desulfurization device is through setting up venturi income gas device 1 and flue gas backflow pipeline 4, can utilize the backward flow of pressure differential control flue gas, and unnecessary extra consumption energy increases the time of flue gas and desulfurizer contact, improves the desulfurization efficiency of flue gas, participates in the reaction once more in returning the desulfurizing tower 2 with unreacted desulfurizer simultaneously. Therefore, the service life of the dust remover 3 can be greatly prolonged, and the use energy consumption is reduced, so that the finally discharged flue gas has low sulfur content and the consumption of the desulfurizer is lower.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (5)
1. The utility model provides a flue gas circulation desulphurization unit for get rid of the sulphur in the industry flue gas, its characterized in that: the flue gas circulating desulfurization device comprises a venturi gas inlet device, a desulfurization tower with an inlet connected with the venturi gas inlet device, a particulate matter returning device arranged at the top end of the desulfurization tower, a dust remover connected with an outlet of the desulfurization tower and a flue gas backflow pipeline, wherein the venturi gas inlet device comprises an expanding pipe connected with the desulfurization tower, a throat pipe arranged at one end of the desulfurization tower and a reducing pipe arranged at one end of the expanding pipe, the throat pipe is far away from one end of the expanding pipe, and the flue gas backflow pipeline is connected with the throat pipe of the outlet of the desulfurization tower and the venturi gas inlet device.
2. The flue gas desulfurization apparatus according to claim 1, characterized in that: and a valve for controlling the flow of the flue gas is arranged in the flue gas return pipeline.
3. The flue gas desulfurization apparatus according to claim 2, characterized in that: the valve is an electric valve.
4. The flue gas desulfurization apparatus according to claim 3, characterized in that: and a sulfur content detection device is arranged at the outlet of the desulfurizing tower.
5. The flue gas desulfurization apparatus according to claim 4, characterized in that: the flue gas circulating desulfurization device also comprises a control unit, and the control unit is interlocked with the sulfur content detection device and the electric valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020031748.9U CN211753775U (en) | 2020-01-07 | 2020-01-07 | Flue gas circulating desulfurization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020031748.9U CN211753775U (en) | 2020-01-07 | 2020-01-07 | Flue gas circulating desulfurization device |
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| Publication Number | Publication Date |
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| CN211753775U true CN211753775U (en) | 2020-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020031748.9U Active CN211753775U (en) | 2020-01-07 | 2020-01-07 | Flue gas circulating desulfurization device |
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| CN (1) | CN211753775U (en) |
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2020
- 2020-01-07 CN CN202020031748.9U patent/CN211753775U/en active Active
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