CN219809886U - Main steam and reheat steam bypass system - Google Patents
Main steam and reheat steam bypass system Download PDFInfo
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- CN219809886U CN219809886U CN202321136026.XU CN202321136026U CN219809886U CN 219809886 U CN219809886 U CN 219809886U CN 202321136026 U CN202321136026 U CN 202321136026U CN 219809886 U CN219809886 U CN 219809886U
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- steam
- reheat
- heat boiler
- main
- waste heat
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- 239000002918 waste heat Substances 0.000 claims abstract description 79
- 239000000571 coke Substances 0.000 claims abstract description 68
- 238000010791 quenching Methods 0.000 claims abstract description 42
- 230000000171 quenching effect Effects 0.000 claims abstract description 42
- 238000001704 evaporation Methods 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 7
- 238000011084 recovery Methods 0.000 abstract description 2
- 238000003303 reheating Methods 0.000 description 24
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 239000003546 flue gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Coke Industry (AREA)
Abstract
The utility model discloses a main steam and reheat steam bypass system, which relates to the technical field of heat recovery coke ovens and comprises a dry quenching waste heat boiler, a coke oven waste heat boiler, a turbine set, a main steam main pipe and a reheat steam main pipe, wherein one end of the main steam main pipe is respectively communicated with the dry quenching waste heat boiler and the coke oven waste heat boiler, the other end of the main steam main pipe is communicated with the turbine set, one end of the reheat steam main pipe is communicated with the turbine set, the other end of the reheat steam main pipe is communicated with the coke oven waste heat boiler, the main steam and reheat steam bypass system also comprises a branch structure, and one end of the branch structure is connected with the turbine set, and the other end of the branch structure is connected with the dry quenching waste heat boiler or the reheat steam main pipe. The bypass system for the main steam and the reheat steam provided by the utility model enables the unit to normally operate under the accident condition of the coke oven waste heat boiler.
Description
Technical Field
The utility model relates to the technical field of heat recovery coke ovens, in particular to a main steam and reheat steam bypass system of a coke oven flue gas waste heat and red coke waste heat power plant.
Background
With the technical progress, the coke oven flue gas waste heat and red coke waste heat power plant is developed to an ultrahigh temperature and ultrahigh pressure reheating unit at present, and a unit configuration combination of a dry quenching waste heat boiler and a plurality of coke oven waste heat boilers matched with an ultrahigh temperature and ultrahigh pressure reheating steam turbine is mostly adopted; because the dry quenching waste heat boiler has no reheating system, the reheating system of the coke oven waste heat boiler needs to bear the main steam quantity of the dry quenching waste heat boiler, when one coke oven waste heat boiler is in accident, the reheating steam quantity of other coke oven waste heat boilers can be large, the pipeline pressure loss and the reheater pressure loss are increased, and the pressure of the front steam of the reheating main steam valve of the steam turbine does not meet the requirement of the steam turbine, so that the normal operation of the unit is affected. The main steam and reheat steam bypass system of the coke oven flue gas waste heat and red coke waste heat power plant is provided, so that a unit can normally operate under the accident condition of a coke oven waste heat boiler.
Disclosure of Invention
In view of the defects existing at present, the utility model provides a main steam and reheat steam bypass system, so that a unit can normally operate under the accident condition of a coke oven waste heat boiler.
In order to achieve the above purpose, the embodiment of the present utility model adopts the following technical scheme:
the utility model provides a main steam and reheat steam bypass system, includes dry quenching exhaust-heat boiler, coke oven exhaust-heat boiler, turbine group, main steam main pipe, reheat steam main pipe, main steam main pipe one end respectively with dry quenching exhaust-heat boiler, coke oven exhaust-heat boiler intercommunication, main steam main pipe other end and turbine group intercommunication, reheat steam main pipe one end and turbine group intercommunication, the other end and coke oven exhaust-heat boiler intercommunication, main steam and reheat steam bypass system still include the branch road structure, branch road structure one end links to each other with turbine group, the other end links to each other with dry quenching exhaust-heat boiler or reheat steam main pipe.
According to one aspect of the utility model, the steam turbine unit comprises a steam turbine and a condenser.
According to one aspect of the utility model, the branch structure is a primary large bypass device, one end of the primary large bypass device is connected with the dry quenching waste heat boiler, and the other end of the primary large bypass device is connected with the condenser.
According to one aspect of the utility model, the bypass structure is a bypass device, one end of which is communicated with the reheat steam main pipe, and the other end of which is communicated with the steam turbine.
According to one aspect of the utility model, half of the normal evaporation capacity of the dry quenching waste heat boiler enters the primary large bypass device.
According to one aspect of the utility model, the turbine comprises a low pressure cylinder, and one end of the bypass device is communicated with the reheat steam main pipe, and the other end of the bypass device is communicated with the low pressure cylinder.
According to one aspect of the utility model, the reheat steam header comprises a reheat cold section steam header and a reheat hot section steam header, wherein one end of the reheat cold section steam header is communicated with a steam turbine, the other end of the reheat cold section steam header is communicated with a coke oven waste heat boiler, and one end of the reheat hot section steam header is communicated with the steam turbine, and the other end of the reheat hot section steam header is communicated with the coke oven waste heat boiler.
According to one aspect of the utility model, the bypass device is in communication with the reheat cold section steam header at one end and the low pressure cylinder at the other end.
According to one aspect of the utility model, the dry quenching waste heat boiler is provided with one coke oven waste heat boiler, and the number of the coke oven waste heat boilers is a plurality.
According to one aspect of the utility model, the coke oven waste heat boiler has two.
The implementation of the utility model has the advantages that: the utility model provides a main steam and reheat steam bypass system, includes dry quenching exhaust-heat boiler, coke oven exhaust-heat boiler, turbine group, main steam main pipe, reheat steam main pipe, main steam main pipe one end respectively with dry quenching exhaust-heat boiler, coke oven exhaust-heat boiler intercommunication, main steam main pipe other end and turbine group intercommunication, reheat steam main pipe one end and turbine group intercommunication, the other end and coke oven exhaust-heat boiler intercommunication, main steam and reheat steam bypass system still include the branch road structure, branch road structure one end links to each other with turbine group, the other end links to each other with dry quenching exhaust-heat boiler or reheat steam main pipe. Through setting up the branch structure, set up one-level big bypass device or side branch device promptly, make the unit can continue normal operating under coke oven exhaust-heat boiler accident condition, simple structure has practiced thrift cost such as maintenance time, and is more economical, has improved production efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first embodiment of the present utility model;
fig. 2 is a schematic structural diagram of a second embodiment of the present utility model.
The names corresponding to the serial numbers in the figures are as follows:
1. a dry quenching waste heat boiler; 2. a coke oven waste heat boiler; 3. a steam turbine; 4. a condenser; 5. a main steam main pipe; 51. a first main steam header; 52. a second main steam header; 6. a primary large bypass device; 7. a bypass device; 8. reheat the cold-section steam main pipe; 9. reheat hot section steam header.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. 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.
Example 1
As shown in fig. 1, the main steam and reheat steam bypass system comprises a dry quenching waste heat boiler 1, a coke oven waste heat boiler 2, a turbine set, a main steam main pipe 5 and a reheat steam main pipe, wherein the turbine set comprises a turbine 3 and a condenser 4; one end of the main steam main pipe 5 is respectively communicated with the dry quenching waste heat boiler 1 and the coke oven waste heat boiler 2, and the other end of the main steam main pipe 5 is communicated with the steam turbine 3; the main steam main pipe 5 can be obviously split into a first main steam main pipe 51 and a second main steam main pipe 52, wherein one end of the first main steam main pipe 51 is communicated with the dry quenching waste heat boiler 1, the other end of the first main steam main pipe is communicated with the steam turbine 3, and one end of the second main steam main pipe 52 is communicated with the coke oven waste heat boiler 2, and the other end of the second main steam main pipe is communicated with the steam turbine 3; the steam turbine 3 is connected with the condenser 4; the reheating steam main pipe comprises a reheating cold section steam main pipe 8 and a reheating hot section steam main pipe 9, one end of the reheating cold section steam main pipe 8 is communicated with the steam turbine 3, the other end of the reheating cold section steam main pipe is communicated with the coke oven waste heat boiler 2, one end of the reheating hot section steam main pipe 9 is communicated with the steam turbine 3, and the other end of the reheating hot section steam main pipe is communicated with the coke oven waste heat boiler 2; the number of the coke oven waste heat boilers 2 is a plurality, preferably two in the embodiment, of the dry quenching waste heat boilers 1, and the number of the second main steam main pipes 52 is consistent with the number of the coke oven waste heat boilers 2. The main steam and reheat steam bypass system further comprises a bypass structure, the bypass structure is a primary large bypass device 6, one end of the primary large bypass device 6 is connected with the dry quenching waste heat boiler 1, the other end of the primary large bypass device is connected with the condenser 4, or one end of the primary large bypass device 6 is connected with the first main steam main pipe 51, and the other end of the primary large bypass device is connected with the condenser 4.
In the embodiment, half of the normal evaporation capacity of the dry quenching waste heat boiler 1 enters the primary large bypass device 6.
In this embodiment, the primary large bypass device 6 may be a pipeline, and the pipeline is correspondingly connected, and a control valve may be disposed on the pipeline for controlling the circulation and flow rate of steam in the pipeline; the dry quenching waste heat boiler 1 or the first main steam main pipe 51 is communicated with the condenser 4 by adopting one branch pipe, so that the main steam inlet amount of the steam turbine 3 is reduced, 50% of the normal evaporation amount of the dry quenching waste heat boiler 1 is directly introduced into the primary large bypass device 6 and the condenser 4, and does not participate in the work of the steam turbine 3, so that the whole unit can normally run under the accident working condition of the coke oven waste heat boiler 2. So set up, simple structure practices thrift the cost.
The principle of this embodiment is explained as follows:
when the existing system consists of one dry quenching waste heat boiler 1 and two coke oven waste heat boilers 2, when the evaporation capacity of the dry quenching waste heat boiler 1 is A0 and the evaporation capacity of the coke oven waste heat boiler 2 is A1, the steam inlet capacity of the steam turbine 3 is A0+2A1, the steam utilization rate is 92%, the reheat steam capacity is 0.92 (A0+2A1) at the moment, and because the dry quenching waste heat boiler 1 has no reheating system, the reheat steam capacity entering the one coke oven waste heat boiler 2 at the moment is 0.46 (A0+2A1), namely, when the whole unit works normally, the reheat steam capacity entering the one coke oven waste heat boiler 2 is 0.46 (A0+2A1). If an accident occurs in one coke oven waste heat boiler 2, the actual steam inlet amount of the steam turbine 3 is A0+A1 at this moment, the steam utilization rate is 92% as well, and the reheat steam amount is 0.92 x (A0+A1) at this moment, namely, the reheat steam amount entering the remaining one intact coke oven waste heat boiler 2 is 0.92 x (A0+A1), which obviously exceeds the reheat steam amount entering the two coke oven waste heat boilers 2 singly during normal operation, namely, the reheat steam amount is too large, the pipeline pressure loss and the pressure loss of the reheater in the boiler are increased, so that the reheat main valve forward steam pressure of the steam turbine 3 does not meet the requirement of the steam turbine 3; namely, in the prior art, after an accident occurs in one coke oven waste heat boiler 2, the whole unit cannot continue to normally operate.
By setting the first-stage large bypass device 6 with 50% of the normal evaporation capacity of the dry quenching waste heat boiler 1 in the embodiment, when an accident occurs in one coke oven waste heat boiler 2, the first-stage large bypass device with 50% of the dry quenching waste heat boiler 1 is put into operation, the steam inlet of the steam turbine 3 is 0.5A0+A1, the steam utilization rate is 92%, and the reheat steam quantity is 0.92 (0.5A0+A1)
The system is=0.46 (A0+2A1), meets the requirement of reheat steam quantity entering one coke oven waste heat boiler 2 when the whole unit works normally, and can realize continuous normal operation of the unit without worrying about pipeline pressure loss, reheater pressure loss and other problems.
Example two
As shown in fig. 2, the main steam and reheat steam bypass system comprises a dry quenching waste heat boiler 1, a coke oven waste heat boiler 2, a turbine set, a main steam main pipe 5 and a reheat steam main pipe, wherein the turbine set comprises a turbine 3 and a condenser 4; one end of the main steam main pipe 5 is respectively communicated with the dry quenching waste heat boiler 1 and the coke oven waste heat boiler 2, and the other end of the main steam main pipe 5 is communicated with the steam turbine 3; the main steam main pipe 5 can be obviously split into a first main steam main pipe 51 and a second main steam main pipe 52, wherein one end of the first main steam main pipe 51 is communicated with the dry quenching waste heat boiler 1, the other end of the first main steam main pipe is communicated with the steam turbine 3, and one end of the second main steam main pipe 52 is communicated with the coke oven waste heat boiler 2, and the other end of the second main steam main pipe is communicated with the steam turbine 3; the steam turbine 3 is connected with the condenser 4; the reheating steam main pipe comprises a reheating cold section steam main pipe 8 and a reheating hot section steam main pipe 9, one end of the reheating cold section steam main pipe 8 is communicated with the steam turbine 3, the other end of the reheating cold section steam main pipe is communicated with the coke oven waste heat boiler 2, one end of the reheating hot section steam main pipe 9 is communicated with the steam turbine 3, and the other end of the reheating hot section steam main pipe is communicated with the coke oven waste heat boiler 2; the number of the coke oven waste heat boilers 2 is a plurality, preferably two in the embodiment, of the dry quenching waste heat boilers 1, and the number of the second main steam main pipes 52 is consistent with the number of the coke oven waste heat boilers 2. The main steam and reheat steam bypass system further comprises a bypass structure, the bypass structure is a bypass device 7, one end of the bypass device 7 is communicated with the reheat steam main pipe, and the other end of the bypass device is communicated with the steam turbine 3.
In the present embodiment, the low pressure cylinder portion of the steam turbine 3 is perforated, and one end of the bypass device 7 is connected to the reheat cold section steam header 8, and the other end is connected to the low pressure cylinder.
In this embodiment, the bypass device 7 may be a pipeline, and the pipeline is correspondingly connected, and a control valve may be arranged on the pipeline to control the circulation and flow rate of steam in the pipeline; the reheating cold section steam main pipe 8 is communicated with the low-pressure cylinder by adopting a branch pipe, so that part of steam on the reheating cold section steam main pipe 8 is directly introduced into the low-pressure cylinder of the steam turbine 3 to do work, the reheating of the boiler is not participated, and the unit can be ensured to normally operate under the accident working condition of the coke oven waste heat boiler 2. So set up, whole structural arrangement is simpler, and the dismouting of being convenient for, the cost is lower.
The implementation of the utility model has the advantages that: the utility model provides a main steam and reheat steam bypass system, includes dry quenching exhaust-heat boiler 1, coke oven exhaust-heat boiler 2, turbo unit, main steam main pipe 5, reheat steam main pipe, main steam main pipe 5 one end communicates with dry quenching exhaust-heat boiler 1, coke oven exhaust-heat boiler 2 respectively, and main steam main pipe 5 other end and turbo unit intercommunication, reheat steam main pipe one end and turbo unit intercommunication, the other end and coke oven exhaust-heat boiler 2 intercommunication, main steam and reheat steam bypass system still includes the branch road structure, branch road structure one end links to each other with turbo unit, and the other end links to each other with dry quenching exhaust-heat boiler 1 or reheat steam main pipe. Through setting up the branch structure, set up the big bypass device 6 of one-level or bypass device 7 promptly, make the unit can continue normal operating under coke oven exhaust-heat boiler 2 accident condition, simple structure has practiced thrift cost such as maintenance time, and is more economical, has improved production efficiency.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a main steam and reheat steam bypass system, includes dry quenching exhaust-heat boiler (1), coke oven exhaust-heat boiler (2), turbine unit, main steam main pipe (5), reheat steam main pipe, main steam main pipe (5) one end respectively with dry quenching exhaust-heat boiler (1), coke oven exhaust-heat boiler (2) intercommunication, main steam main pipe (5) other end and turbine unit intercommunication, reheat steam main pipe one end and turbine unit intercommunication, other end and coke oven exhaust-heat boiler (2) intercommunication, a serial communication port, main steam and reheat steam bypass system still includes the branch road structure, branch road structure one end links to each other with turbine unit, the other end links to each other with dry quenching exhaust-heat boiler (1) or reheat steam main pipe.
2. The main steam and reheat steam bypass system as defined in claim 1, wherein the steam turbine unit includes a steam turbine (3), a condenser (4).
3. The main steam and reheat steam bypass system as claimed in claim 2, wherein the bypass structure is a primary large bypass device (6), one end of the primary large bypass device (6) is connected with the dry quenching waste heat boiler (1), and the other end is connected with the condenser (4).
4. A main steam and reheat steam bypass system as defined in claim 2, wherein the bypass structure is a bypass device (7), one end of the bypass device (7) being in communication with the reheat steam header, and the other end being in communication with the steam turbine (3).
5. A main steam and reheat steam bypass system as claimed in claim 3, wherein half of the normal evaporation capacity of the dry quenching waste heat boiler (1) enters the primary large bypass device (6).
6. The main steam and reheat steam bypass system as defined in claim 4, wherein the steam turbine (3) includes a low pressure cylinder, and the bypass device (7) has one end connected to the reheat steam header and the other end connected to the low pressure cylinder.
7. The main steam and reheat steam bypass system as set forth in claim 6, wherein the reheat steam header includes a reheat cold section steam header (8) and a reheat hot section steam header (9), one end of the reheat cold section steam header (8) is communicated with the steam turbine (3) and the other end is communicated with the coke oven waste heat boiler (2), and one end of the reheat hot section steam header (9) is communicated with the steam turbine (3) and the other end is communicated with the coke oven waste heat boiler (2).
8. A main steam and reheat steam bypass system as defined in claim 7, wherein the bypass means (7) communicates at one end with the reheat cold leg steam header (8) and at the other end with the low pressure cylinder.
9. The main steam and reheat steam bypass system as defined in claim 1, wherein the number of coke oven exhaust heat boilers (2) is several, and one dry quenching exhaust heat boiler (1) is provided.
10. The main steam and reheat steam bypass system as defined in claim 9, wherein there are two coke oven exhaust heat boilers (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136026.XU CN219809886U (en) | 2023-05-11 | 2023-05-11 | Main steam and reheat steam bypass system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321136026.XU CN219809886U (en) | 2023-05-11 | 2023-05-11 | Main steam and reheat steam bypass system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219809886U true CN219809886U (en) | 2023-10-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321136026.XU Active CN219809886U (en) | 2023-05-11 | 2023-05-11 | Main steam and reheat steam bypass system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219809886U (en) |
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2023
- 2023-05-11 CN CN202321136026.XU patent/CN219809886U/en active Active
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