CN219355842U - Wet desulfurization slurry supply system for two same type thermal power generating units - Google Patents
Wet desulfurization slurry supply system for two same type thermal power generating units Download PDFInfo
- Publication number
- CN219355842U CN219355842U CN202320386541.7U CN202320386541U CN219355842U CN 219355842 U CN219355842 U CN 219355842U CN 202320386541 U CN202320386541 U CN 202320386541U CN 219355842 U CN219355842 U CN 219355842U
- Authority
- CN
- China
- Prior art keywords
- slurry supply
- slurry
- pipeline
- pipe
- valve group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to a wet desulfurization slurry supply system of two thermal power generating units of the same type, which belongs to the technical field of wet desulfurization systems and comprises a slurry tank I and a slurry tank II, wherein the slurry tank I and the slurry tank II are respectively connected with two absorption towers through a slurry supply main pipe I and a slurry supply main pipe II; the primary slurry supply pipe I is sequentially provided with a primary slurry supply pump I, a branch pipe I, a connecting valve group I, a connecting sub-pipeline I, a return pipeline I and a slurry supply regulating valve group along the slurry supply direction of limestone slurry; the second slurry supply main pipe is sequentially provided with a fourth slurry supply pump, a second branch pipe, a third communication valve group, a second connecting sub-pipeline, a second return pipeline and a second slurry supply regulating valve group along the slurry supply direction of the limestone slurry. The utility model can ensure the circulating flow of the system, is not easy to be blocked, can effectively improve the slurry supply flow, meets the requirement of changing sulfur content of the fire coal and ensures the normal operation of the slurry supply system.
Description
Technical Field
The utility model relates to a wet desulfurization slurry supply system of two thermal power generating units of the same type, and belongs to the technical field of wet desulfurization systems.
Background
Most of domestic thermal power plants are built in stages, and 2 units of the same type are built in each stage, for example, a 2X 600MW unit of a certain power plant in the first period works, and the two units are identical in type, parameter and the like, and the combustion coal types are the same. In the case of desulfurization systems, the absorber parameters are consistent, and typically each unit is constructed with a desulfurization absorber that is disposed in the stack area of the unit. The slurry supply system belongs to a desulfurization public area and is arranged at the position of the desulfurization public area.
In the wet desulfurization principle, sulfur dioxide in flue gas is absorbed by limestone slurry supplied to an absorption tower by a slurry supply system, calcium sulfite is generated by reaction, and the calcium sulfite is oxidized to generate gypsum under the action of oxidation wind, so that sulfur dioxide removal is realized. However, in the running process of the existing limestone slurry supply system, the conditions of pipeline blockage and insufficient slurry supply flow are easy to occur, and the system is caused to run abnormally, so that the condition that sulfur dioxide emission does not reach the standard occurs, and improvement is urgently needed.
Disclosure of Invention
In order to overcome the defects of easy blockage, insufficient slurry supply flow and the like in the operation process of the existing limestone slurry supply system, the utility model designs the wet desulfurization slurry supply system of two thermal power generating units of the same type, which can ensure the circulating flow of the system and is not easy to block, and can effectively improve the slurry supply flow and ensure the normal operation of the system.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the wet desulfurization slurry supply system of the two thermal power generating units of the same type comprises a slurry tank I and a slurry tank II, wherein the slurry tank I and the slurry tank II are connected with two absorption towers through a slurry supply main pipe I and a slurry supply main pipe II respectively; the slurry supply main pipe I is sequentially provided with a slurry supply pump I, a branch pipe I, a connecting valve group I, a connecting sub-pipeline I, a return pipeline I and a slurry supply regulating valve group along the slurry supply direction of limestone slurry, the free end of the branch pipe I is connected with a slurry tank II, the branch pipe I is provided with a slurry supply pump III, and the free end of the return pipeline I is connected with the slurry tank I; the slurry supply main pipe II is sequentially provided with a slurry supply pump IV, a branch pipe II, a communication valve group III, a connecting sub-pipeline II, a return pipeline II and a slurry supply regulating valve group along the slurry supply direction of the limestone slurry, the free end of the branch pipe II is connected with the slurry tank I, the branch pipe II is provided with the slurry supply pump II, the free end of the return pipeline II is connected with the slurry tank II, and the connecting sub-pipeline I and the connecting sub-pipeline II are mutually communicated to form a connecting pipeline, and the connecting pipeline is provided with the communication valve group II.
Further, a plurality of flushing ports are arranged on the first slurry supply main pipe and the second slurry supply main pipe, and each flushing port is externally connected with process water.
Further, the pipe diameter of the first return pipeline is smaller than that of the first slurry supply main pipe, and the pipe diameter of the second return pipeline is smaller than that of the second slurry supply main pipe.
Further, the connection points of the first slurry supply main pipe and the second slurry supply main pipe and the absorption tower are arranged at the lower end of the running liquid level in the absorption tower.
Further, the highest point of the return pipeline is higher than the connecting point of the slurry supply main pipe and the absorption tower by more than three meters; the highest point of the second return pipeline is higher than the connecting point of the second slurry supply main pipeline and the absorption tower by more than three meters.
Compared with the prior art, the utility model has the following characteristics and beneficial effects:
1. according to the utility model, through the arrangement of the slurry supply main pipe and the branch pipe, the slurry outlet of the two slurry tanks can be converged on the same slurry supply main pipe, so that the engineering cost is effectively reduced, and the system construction cost is saved; the connection valve group pipeline is arranged at the slurry supply main pipe of the slurry supply pump outlet of the limestone, so that the standby of the system can be further increased, if a certain condition exists, the two slurry supply pumps of one unit are failed, the other slurry supply pump of the other unit is started, the parallel operation flow of the two pumps is doubled, and the simultaneous slurry supply to the two absorption towers can be realized through the connection valve group pipeline.
2. In the utility model, the connecting valve group is arranged near the slurry supply pump outlet rather than the absorption tower, because the two pumps are operated in parallel, the flow rate is doubled, the flow rate is increased when the pipe diameter is unchanged, and the single slurry supply pipeline can be prevented from being eroded and worn due to the increased flow rate when the connecting valve group is arranged at the pump outlet side, so that the service life is reduced.
3. In the utility model, the connection point of the slurry supply pipeline connected to the absorption tower is arranged at the lower end of the height of the operating liquid level in the absorption tower, and the slurry supply pipeline has a similar siphon effect in operation, so that the resistance of the slurry supply system can be reduced; the current is reduced under the same flow rate of the slurry supply pump, and the energy-saving effect is good.
4. According to the utility model, through the arrangement of the backflow pipeline, the circulating flow of the system is not easy to be blocked, the allowance of a slurry supply system is ensured, for example, when the coal variety is changed and the sulfur content is increased, the backflow valve on the backflow pipeline is closed, the slurry supply flow can be effectively improved, the slurry supply requirement of larger sulfur content is met, the normal operation of the desulfurization system is ensured, and the sulfur dioxide is discharged after reaching the standard; through the setting of external process water of washing mouth, can carry out effective washing under the circumstances of stopping the operation such as corresponding junction pipeline of washing mouth, avoid stopping supplying thick liquid back thick liquid deposit to take place to block up in the pipeline.
Drawings
Fig. 1 is a schematic diagram of the connection of the present utility model.
Wherein the reference numerals are as follows: 1. a slurry tank I; 2. a slurry tank II; 3. a slurry supply pump I; 4. a pulp supply pump II; 5. a slurry supply pump III; 6. a slurry supply pump IV; 7. a first connecting valve group; 8. a second connecting valve group; 9. a communication valve group III; 10. a pulp supply regulating valve group; 11. a first return line; 12. a slurry supply main pipe I; 13. a slurry supply main pipe II; 14. a branch pipe I; 15. a branch pipe II; 16. a connecting pipeline; 17. and a return pipeline II.
Detailed Description
The present utility model will be described in more detail with reference to examples.
As shown in fig. 1, the wet desulfurization slurry supply system of two thermal power generating units of the same type in this embodiment includes a slurry tank 1 and a slurry tank 2, where the slurry tank 1 and the slurry tank 2 are connected to two absorption towers through a slurry supply main pipe 12 and a slurry supply main pipe 13, respectively;
the slurry supply main pipe I12 is sequentially provided with a slurry supply pump I3, a branch pipe I14, a connecting valve group I7, a connecting sub-pipeline I, a return pipeline I11 and a slurry supply regulating valve group 10 along the slurry supply direction of limestone slurry, the free end of the branch pipe I14 is connected with a slurry tank II 2, the branch pipe I14 is provided with a slurry supply pump III 5, and the free end of the return pipeline I11 is connected with the slurry tank I1;
the slurry supply main pipe II 13 is sequentially provided with a slurry supply pump IV 6, a branch pipe II 15, a connecting valve group III 9, a connecting sub-pipeline II, a return pipeline II 17 and a slurry supply regulating valve group 10 along the slurry supply direction of limestone slurry, the free end of the branch pipe II 15 is connected with a slurry tank I1, the branch pipe II 15 is provided with a slurry supply pump II 4, the free end of the return pipeline II 17 is connected with a slurry tank II 2, the connecting sub-pipeline I and the connecting sub-pipeline II are mutually communicated to form a connecting pipeline 16, and the connecting pipeline 16 is provided with a connecting valve group II 8;
the connecting pipeline 16, the first connecting valve group 7, the second connecting valve group 8 and the third connecting valve group 9 form a connecting valve group pipeline, two ends of the connecting valve group pipeline are respectively arranged at the outlet after the first pulp feeding pump 3 and the third pulp feeding pump 5 are combined and at the outlet after the second pulp feeding pump 4 and the fourth pulp feeding pump 6 are combined, and the connecting valve group pipeline is arranged near the pump outlet of the pulp feeding pump instead of the absorption tower, because the two pulp feeding pumps are operated in parallel, the flow rate is doubled when the pipe diameter is unchanged, and the flow rate is increased, and the connecting valve group pipeline is arranged at the side of the pump outlet of the pulp feeding pump, so that the condition that the service life of a single pulp feeding pipeline is reduced due to the fact that the flow rate is increased and worn by scouring is avoided;
the arrangement of the connecting valve group pipeline can increase the standby of the system, if a certain condition happens that two slurry supply pumps of one unit are failed, two slurry supply pumps of the other unit are started, the parallel operation flow of the two slurry supply pumps is increased, and the simultaneous slurry supply can be realized through the connecting valve group;
as shown in fig. 1, for example, when the first pulp feeding pump 3 and the third pulp feeding pump 5 of the absorption tower 1 are failed, the valve of the first connecting valve set 7 is closed, and the valve of the second connecting valve set 8 is opened, so that the second pulp feeding pump 4 and the fourth pulp feeding pump 6 can be started to simultaneously feed pulp for the first absorption tower and the second absorption tower.
Particularly, in this embodiment, each slurry supply pump is non-variable frequency, and in the running process of the variable frequency slurry supply pump, the pipeline flow speed is slow under the low frequency condition (i.e. the condition that the slurry supply amount of the absorption tower is smaller), so that slurry deposition blockage is easily caused.
Further, a plurality of flushing ports are respectively arranged on the first slurry supply main pipe 12 and the second slurry supply main pipe 13, each flushing port is externally connected with process water, in the embodiment, the flushing ports are respectively arranged at the outlet of the slurry supply pump and the output end of the slurry supply regulating valve group 10, so that the system flushing under various combinations is satisfied, and slurry accumulation is prevented.
Further, the pipe diameter of the first return pipe 11 is smaller than the pipe diameter of the first slurry supply main pipe 12, the pipe diameter of the second return pipe 17 is smaller than the pipe diameter of the second slurry supply main pipe 13, in this embodiment, the slurry supply main pipe is DN100, and the return pipe is DN80.
Further, the connection points of the first slurry supply main pipe 12 and the second slurry supply main pipe 13 and the absorption tower are all arranged at the lower end of the running liquid level height in the absorption tower, the running liquid level height of the absorption tower is usually 8-10 m in the absorption tower, and the connection point of the first slurry supply main pipe and the absorption tower is arranged below the running liquid level height, so that in the running process of the system, the siphon effect of the first slurry supply main pipe is generated, the resistance of the slurry supply system can be reduced, and the current is reduced under the same flow rate as for the slurry supply pump, thereby having a good energy-saving effect.
Further, the highest point of the first return pipeline 11 is higher than the connecting point of the first slurry supply main pipeline 12 and the absorption tower by more than three meters; the highest point of the second return pipeline 17 is higher than the connecting point of the second slurry supply main pipeline 13 and the absorption tower by more than three meters, so that the excessive return flow can be prevented from influencing the normal slurry supply when the manual door of the return pipeline is fully opened in the system operation.
The working principle of the utility model is as follows: one of the two slurry tanks is used as a standby, so that the system can be ensured to have reliable standby, and when a single slurry supply pump or the slurry tank needs to be overhauled, the other slurry tank or the slurry supply pump can reliably supply slurry, and the running stability of the system is ensured;
by arranging the slurry supply main pipe and the branch pipe, the slurry discharged from the two slurry tanks can be collected on the same slurry supply main pipe, so that the engineering cost is effectively reduced, and the system construction cost is saved;
by arranging the pipeline of the connecting valve group, the standby of the system can be increased, if a certain condition happens that two slurry supply pumps of one unit are failed, two slurry supply pumps of the other unit are started, the parallel operation flow of the two slurry supply pumps is doubled, and the simultaneous slurry supply to the two absorption towers can be realized through the connecting valve group;
through the arrangement of the backflow pipeline, the circulating flow of the system is effectively ensured not to be blocked easily, and the allowance of a slurry supply system is ensured, for example, when the coal types are changed and the sulfur content is increased, the flow of slurry supply can be effectively improved by closing the backflow pipeline, the normal desulfurization operation is ensured, and the sulfur dioxide and the like are discharged up to the standard;
through the setting of external process water of washing mouth, can carry out effective washing under the circumstances of stopping the operation such as corresponding junction pipeline of washing mouth, avoid stopping supplying thick liquid back thick liquid deposit to take place to block up in the pipeline.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "inner", "outer", "upper", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the term "connected" should be interpreted broadly, and for example, it may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Claims (5)
1. Two thermal power generating unit wet flue gas desulfurization confession thick liquid system of same type, its characterized in that: the device comprises a slurry tank I (1) and a slurry tank II (2), wherein the slurry tank I (1) and the slurry tank II (2) are respectively connected with two absorption towers through a slurry supply main pipe I (12) and a slurry supply main pipe II (13);
the primary slurry supply pipe I (12) is sequentially provided with a primary slurry supply pump I (3), a branch pipe I (14), a connecting valve group I (7), a connecting sub-pipeline I, a return pipeline I (11) and a primary slurry supply regulating valve group (10) along the slurry supply direction of limestone slurry, the free end of the branch pipe I (14) is connected with a secondary slurry tank II (2), the branch pipe I (14) is provided with a primary slurry supply pump III (5), and the free end of the return pipeline I (11) is connected with the primary slurry tank I (1);
the slurry supply main pipe II (13) is sequentially provided with a slurry supply pump IV (6), a branch pipe II (15), a connecting valve group III (9), a connecting sub-pipeline II, a return pipeline II (17) and a slurry supply regulating valve group (10) along the slurry supply direction of limestone slurry, the free end of the branch pipe II (15) is connected with the slurry tank I (1), the branch pipe II (15) is provided with a slurry supply pump II (4), the free end of the return pipeline II (17) is connected with the slurry tank II (2), the connecting sub-pipeline I and the connecting sub-pipeline II are mutually communicated to form a connecting pipeline (16), and the connecting pipeline (16) is provided with the connecting valve group II (8).
2. The wet desulfurization slurry supply system for two thermal power generating units of the same type according to claim 1, wherein: a plurality of flushing ports are arranged on the primary slurry supply pipe (12) and the secondary slurry supply pipe (13), and each flushing port is externally connected with process water.
3. The wet desulfurization slurry supply system for two thermal power generating units of the same type according to claim 1, wherein: the pipe diameter of the first return pipeline (11) is smaller than that of the first slurry supply main pipe (12), and the pipe diameter of the second return pipeline (17) is smaller than that of the second slurry supply main pipe (13).
4. The wet desulfurization slurry supply system for two thermal power generating units of the same type according to claim 1, wherein: the connection points of the first slurry supply main pipe (12) and the second slurry supply main pipe (13) and the absorption tower are arranged at the lower end of the running liquid level height in the absorption tower.
5. The wet desulfurization slurry supply system for two thermal power generating units of the same type according to claim 1, wherein: the highest point of the first return pipeline (11) is higher than the connecting point of the first slurry supply main pipeline (12) and the absorption tower by more than three meters; the highest point of the second return pipeline (17) is higher than the connecting point of the second slurry supply main pipeline (13) and the absorption tower by more than three meters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320386541.7U CN219355842U (en) | 2023-03-03 | 2023-03-03 | Wet desulfurization slurry supply system for two same type thermal power generating units |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320386541.7U CN219355842U (en) | 2023-03-03 | 2023-03-03 | Wet desulfurization slurry supply system for two same type thermal power generating units |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219355842U true CN219355842U (en) | 2023-07-18 |
Family
ID=87151421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320386541.7U Active CN219355842U (en) | 2023-03-03 | 2023-03-03 | Wet desulfurization slurry supply system for two same type thermal power generating units |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219355842U (en) |
-
2023
- 2023-03-03 CN CN202320386541.7U patent/CN219355842U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111375302A (en) | Wet desulphurization energy-saving control method and system | |
| CN219355842U (en) | Wet desulfurization slurry supply system for two same type thermal power generating units | |
| CN208923286U (en) | A kind of hydrogen supply protective device for fuel cell system | |
| CN114150728B (en) | Circulation water supply system | |
| CN207279600U (en) | High-pressure heater draining system | |
| CN206199002U (en) | A kind of desulfuration absorbing tower serum recycle system | |
| CN210261140U (en) | Ammonia water preparation system capable of simultaneously preparing ammonia water with two concentrations | |
| CN220345469U (en) | Limestone slurry supply system | |
| CN220432531U (en) | Floating water level seawater recovery system for seawater desulfurization | |
| CN209101379U (en) | Drainage recovering device | |
| CN113217443A (en) | Main pipe energy-saving device and method of centrifugal desulfurization oxidation fan | |
| CN214088131U (en) | Anti-scaling device for water outlet pipeline of anaerobic tower | |
| CN215233282U (en) | Wet flue gas desulfurization major diameter single tower whirl system of thermal power plant | |
| CN219450898U (en) | Water supply system | |
| CN206199764U (en) | A kind of mist separator of desulfurization rinses water system | |
| CN214486374U (en) | Thermal power station oxidation air system | |
| CN217725177U (en) | Deoxygenated water preparation device based on series connection of deoxygenation towers | |
| CN216518452U (en) | Anti-blocking device for sulfur foam pump | |
| CN215908873U (en) | Outer drainage intercommunication system of tower pond circulating water | |
| CN219002574U (en) | Absorption tower | |
| CN116025035B (en) | Control method of same-pressure quantity-keeping multi-unit water supply system | |
| CN212452872U (en) | Water supply equipment with full frequency conversion operation ability | |
| CN217449596U (en) | Control device for adding synergist of desulfurizing tower | |
| CN217379084U (en) | Self-starting pump station | |
| CN210303155U (en) | One-to-two slurry circulating system of frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |