CN212719686U - Water supply system of dry quenching boiler - Google Patents
Water supply system of dry quenching boiler Download PDFInfo
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- CN212719686U CN212719686U CN202020915870.2U CN202020915870U CN212719686U CN 212719686 U CN212719686 U CN 212719686U CN 202020915870 U CN202020915870 U CN 202020915870U CN 212719686 U CN212719686 U CN 212719686U
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Abstract
The utility model discloses a dry quenching boiler water supply system, including the boiler, for the water tank of boiler water supply, the trunk line of connecting boiler and water tank, the trunk line is provided with carries the water in the water tank to the boiler feed pump of boiler, still including the auxiliary line of connecting boiler and water tank, the auxiliary line is provided with carries the water in the water tank to the diesel boiler feed pump of boiler. The utility model has the advantages that: the water supply system for the coke dry quenching boiler can supply water for the boiler in time when a serious power failure accident happens.
Description
Technical Field
The utility model relates to a boiler water supply system, in particular to dry quenching boiler water supply system.
Background
During the coke dry quenching process, red coke is charged from the top of the coke dry quenching furnace. And blowing low-temperature inert gas into a red coke layer of a cooling section of the dry quenching furnace by a circulating fan to absorb sensible heat of the red coke, and discharging the cooled coke from the bottom of the dry quenching furnace. High-temperature inert gas from the annular flue of the coke dry quenching furnace flows through a coke dry quenching process boiler for heat exchange, and the boiler generates steam. And blowing the cooled inert gas into the dry quenching furnace again by a circulating fan, and recycling the inert gas in a closed system.
The boiler needs to be supplied with water by a boiler feed pump. The boiler feed pump is generally driven by electric power, and once a serious power failure accident occurs, the boiler feed pump cannot be started and cannot supply water to the boiler. The boiler can only be used for heat preservation and pressure maintaining operation, and steam supply is stopped. If no power is supplied for a long time or the valve leaks inwards, the boiler is lack of water and is dried, the boiler tube is damaged, and the long-time production stop is caused. Meanwhile, as the steam seal of the steam turbine provides steam for the boiler, the steam turbine loses a steam source after the boiler stops supplying steam, and the steam turbine is damaged to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dry quenching boiler water supply system. The water supply system for the coke dry quenching boiler can supply water for the boiler in time when a serious power failure accident happens.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides a dry quenching boiler water supply system, includes the boiler, for the water tank of boiler water supply, the trunk line of connecting boiler and water tank, the trunk line is provided with carries the water in the water tank to the boiler feed pump of boiler, still including the auxiliary line of connecting boiler and water tank, the auxiliary line is provided with carries the diesel boiler feed pump to the boiler with the water in the water tank.
Through adopting above-mentioned technical scheme, when normal operating, the boiler feed water pump carries the water in the water tank to the boiler in, realizes supplying water for the boiler. When a serious power failure accident happens, the boiler water-feeding pump cannot continue to operate, when the boiler is in a water shortage condition, the diesel oil boiler water-feeding pump starts to operate, water is conveyed to the boiler through the auxiliary pipeline, the conditions that the boiler is in a water shortage condition and the boiler tube is damaged are avoided, meanwhile, the time for supplying steam to the steam turbine can be prolonged, and the steam seal of the steam turbine is prevented from being interrupted to cause damage.
The utility model discloses further set up to: the diesel boiler water-feeding pump comprises an inlet end and an outlet end, and a return pipeline for connecting the outlet ends of the water tank and the diesel boiler water-feeding pump is arranged between the outlet ends of the water tank and the diesel boiler water-feeding pump.
By adopting the technical scheme, when the water level of the boiler drum is kept stable and the water supply flow is small, the return pipeline is started, and the pump body cavitation and further pump burning caused by small outlet flow of the water supply pump of the diesel boiler are avoided.
The utility model discloses further set up to: the auxiliary pipeline is provided with a water supply automatic control valve between the water supply pump of the diesel boiler and the boiler, the return pipeline is provided with a return automatic control valve, and the return pipeline is connected between the water supply automatic control valve and the water supply automatic control valve.
By adopting the technical scheme, when the water supply automatic control valve is in an opening state, if the flow of the diesel boiler feed water pump is greater than a set value, the backflow automatic control valve is closed, and water in the water tank enters the boiler from the auxiliary pipeline under the action of the diesel boiler feed water pump. When the water level of the boiler drum is kept stable, the opening of the water supply automatic control valve is reduced, the water supply flow is reduced to a set value, the backflow automatic control valve is opened, circulation is carried out from the backflow pipeline under the action of the diesel boiler water supply pump, and the situation that the pump body is subjected to cavitation erosion and then the pump is burnt due to the fact that the flow of the outlet of the diesel boiler water supply pump is small is avoided.
The utility model discloses further set up to: the pipe diameter of return line is D, the pipe diameter of vice pipeline is D, and D/D = 0.64.
The utility model discloses further set up to: the auxiliary pipeline is provided with a water supply automatic control valve positioned between a water supply pump of the diesel boiler and the boiler.
The utility model discloses further set up to: the auxiliary pipeline is provided with a water inlet manual control valve positioned between the water tank and a feed pump of the diesel boiler.
The utility model discloses further set up to: the trunk line is provided with and is located the oxygen-eliminating device that is used for carrying out the deoxidization to water between water tank and the boiler feed-water pump, the trunk line is provided with and is located the deoxidization feed-water pump between water tank and the oxygen-eliminating device.
Through adopting above-mentioned technical scheme, the oxygen-eliminating device plays the effect of getting rid of aquatic dissolved oxygen, reduces the corruption of dissolved oxygen to boiler equipment. Accordingly, the deaerator feed pump is used to power the deaerator feed.
The utility model discloses further set up to: and an auxiliary economizer is arranged between the main pipeline and the deaerating water feeding pump and the deaerator.
By adopting the technical scheme, the auxiliary economizer can fully utilize the waste heat exhausted by the lower part of the tail flue of the boiler to heat the water in the main pipeline to low-pressure water supply at about 85 ℃, and the energy consumption is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Reference numerals: 1. a boiler; 2. a water tank; 3. a main pipeline; 4. a deoxygenated water supply pump; 5. a secondary economizer; 6. a deaerator; 7. a boiler feed pump; 8. a secondary pipe; 9. a water inlet manual control valve; 10. a diesel boiler feed pump; 11. a water supply automatic control valve; 12. an inlet end; 13. an outlet end; 14. a return line; 15. a reflux automatic control valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a water supply system for a coke dry quenching boiler includes a boiler 1, a water tank 2 for supplying water to the boiler 1, and a main pipe 3 for connecting the boiler 1 and the water tank 2. In an actual production process, two water tanks 2 will be provided. The water in the water tank 2 is demineralized water or condensed water so as to prevent the heating surface of the furnace tube wall of the boiler 1 from forming scale in the heating and vaporizing process, thereby reducing the efficiency of the boiler 1 and even causing the overheating of the furnace tube. The main pipeline 3 is provided with a deoxidizing water-feeding pump 4, an auxiliary economizer 5, a deoxidizing device 6 and a boiler water-feeding pump 7 in sequence along the water flowing direction. The deaerator 6 plays a role in removing dissolved oxygen in water and reduces corrosion of the dissolved oxygen to the boiler 1 equipment. Accordingly, the deaerator feed pump 4 is used to power the deaerator 6. The boiler feed water pump 7 is used for supplying power to the boiler 1. The deoxygenated feed pump 4 and the boiler feed pump 7 are electrically driven. The auxiliary economizer 5 can fully utilize the waste heat exhausted from the lower part of the tail flue of the boiler 1 to heat the water in the main pipeline 3 to low-pressure feed water at about 85 ℃, and then the water enters the deaerator 6 to deaerate, so that the energy consumption is reduced.
Besides being connected by the main pipeline 3, the water tank 2 and the boiler 1 are also provided with an auxiliary pipeline 8 with the pipe diameter D for connection. One end of the secondary pipe 8 is connected to a portion of the main pipe 3 between the water tank 2 and the deaerating feed pump 4, and the other end is connected to a portion of the main pipe 3 between the boiler feed pump 7 and the boiler 1. The auxiliary pipeline 8 is provided with a water inlet manual control valve 9, a diesel boiler water feeding pump 10 and a water supply automatic control valve 11 in sequence along the water flow direction. In normal operation, the boiler feed pump 7 delivers water from the water tank 2 to the boiler 1, thereby supplying water to the boiler 1. When a serious power failure accident happens, the deoxidizing water-feeding pump 4 and the boiler water-feeding pump 7 cannot continue to operate, when the boiler 1 is in a water shortage condition, the water inlet manual valve 9 is opened, the diesel boiler water-feeding pump 10 starts to operate, water is conveyed to the boiler 1 through the auxiliary pipeline 8, the water shortage of the boiler 1 is avoided, the condition that a boiler tube is damaged is avoided, meanwhile, the time for supplying steam to a steam turbine can be prolonged, and the damage caused by the interruption of steam supply of the steam turbine steam seal is avoided.
The diesel boiler feedwater pump 10 includes an inlet end 12 and an outlet end 13. The water tank 2 is connected with a return pipeline 14 with the pipe diameter d, and one end of the return pipeline 14 far away from the water tank 2 is connected with a part of the auxiliary pipeline 8 between the outlet end 13 of the water supply pump 10 of the diesel boiler and the water supply automatic control valve 11. The return pipe 14 is provided with a return self-control valve 15. The ratio D/D of the pipe diameters of the return pipe 14 and the secondary pipe 8 = 0.64. When a serious power failure accident occurs, the water inlet manual control valve 9 is opened, the backflow automatic control valve 15 is closed, the water supply automatic control valve 11 is opened, and water in the water tank 2 enters the boiler 1 from the auxiliary pipeline 8 under the action of the diesel boiler water supply pump 10. When the water level of the steam drum of the boiler 1 is kept stable, the opening of the water supply automatic control valve 11 is reduced, the water supply flow is reduced to a specified value, the backflow automatic control valve 15 is opened, circulation is carried out from a backflow pipeline under the action of a water supply pump of the diesel boiler, and the situation that the pump body is subjected to cavitation erosion and then the pump is burnt due to the fact that the flow of the outlet of the water supply pump of the diesel boiler is small is avoided.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. The utility model provides a dry coke quenching boiler water supply system, includes the boiler, for the water tank of boiler water supply, the trunk line of connecting boiler and water tank, the trunk line is provided with the boiler feed pump of carrying the water in the water tank to the boiler, characterized by: the system also comprises an auxiliary pipeline for connecting the boiler and the water tank, wherein the auxiliary pipeline is provided with a diesel boiler feed pump for conveying water in the water tank to the boiler.
2. The dry quenching boiler water supply system of claim 1, wherein: the diesel boiler water-feeding pump comprises an inlet end and an outlet end, and a return pipeline for connecting the outlet ends of the water tank and the diesel boiler water-feeding pump is arranged between the outlet ends of the water tank and the diesel boiler water-feeding pump.
3. The dry quenching boiler water supply system of claim 2, wherein: the auxiliary pipeline is provided with a water supply automatic control valve between the water supply pump of the diesel boiler and the boiler, the return pipeline is provided with a return automatic control valve, and the return pipeline is connected between the water supply automatic control valve and the water supply automatic control valve.
4. The dry quenching boiler water supply system of claim 2, wherein: the pipe diameter of return line is D, the pipe diameter of vice pipeline is D, and D/D = 0.64.
5. The dry quenching boiler water supply system of claim 1, wherein: the auxiliary pipeline is provided with a water supply automatic control valve positioned between a water supply pump of the diesel boiler and the boiler.
6. The dry quenching boiler water supply system of claim 1, wherein: the auxiliary pipeline is provided with a water inlet manual control valve positioned between the water tank and a feed pump of the diesel boiler.
7. The dry quenching boiler water supply system of claim 1, wherein: the trunk line is provided with and is located the oxygen-eliminating device that is used for carrying out the deoxidization to water between water tank and the boiler feed-water pump, the trunk line is provided with and is located the deoxidization feed-water pump between water tank and the oxygen-eliminating device.
8. The dry quenching boiler water supply system of claim 7, wherein: and an auxiliary economizer is arranged between the main pipeline and the deaerating water feeding pump and the deaerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020915870.2U CN212719686U (en) | 2020-05-26 | 2020-05-26 | Water supply system of dry quenching boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020915870.2U CN212719686U (en) | 2020-05-26 | 2020-05-26 | Water supply system of dry quenching boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212719686U true CN212719686U (en) | 2021-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020915870.2U Active CN212719686U (en) | 2020-05-26 | 2020-05-26 | Water supply system of dry quenching boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212719686U (en) |
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2020
- 2020-05-26 CN CN202020915870.2U patent/CN212719686U/en active Active
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