CN210485682U - Continuous blowdown system of gas turbine exhaust-heat boiler - Google Patents
Continuous blowdown system of gas turbine exhaust-heat boiler Download PDFInfo
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- CN210485682U CN210485682U CN201921404192.7U CN201921404192U CN210485682U CN 210485682 U CN210485682 U CN 210485682U CN 201921404192 U CN201921404192 U CN 201921404192U CN 210485682 U CN210485682 U CN 210485682U
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Abstract
The utility model relates to a continuous blowdown system of a waste heat boiler of a gas turbine, which comprises a low-pressure superheater, a low-pressure boiler barrel, a deoxidizing boiler barrel, a first blowdown pipe, a deaerator, a water storage tank, a second blowdown pipe, a periodic blowdown flash tank and a third blowdown pipe; the outlet of the low-pressure superheater is connected with the inlet of the low-pressure boiler barrel; one end of the first drain pipe is connected with the outlet of the low-pressure boiler barrel, and the other end of the first drain pipe is connected with the inlet of the oxygen-removing boiler barrel; the deoxidizing drum is connected with the deaerator; one end of the second sewage discharge pipe is connected with the outlet of the deoxidizing boiler barrel, and the other end of the second sewage discharge pipe is connected with the water storage tank; one end of the third sewage discharge pipe is connected with the water storage tank, and the other end of the third sewage discharge pipe is connected with the inlet of the periodical sewage discharge flash tank; also comprises a flue gas pipeline. The utility model discloses can be used for the continuous blowdown of gas turbine exhaust-heat boiler, novel structure is reasonable, and the blowdown is convenient, practices thrift the energy consumption, and is with low costs.
Description
Technical Field
The utility model relates to a continuous blowdown system especially relates to a continuous blowdown system of gas turbine exhaust-heat boiler.
Background
The exhaust heat boiler is a boiler using sensible heat in exhaust gas, waste material or waste liquid in various industrial processes or heat generated after combustion of combustible materials thereof, or a boiler using heat of high-temperature flue gas discharged from a gas turbine in a combined cycle unit of fuel oil. The waste heat boiler generally comprises a boiler barrel, a movable smoke hood, a furnace mouth section flue, an inclined section flue, a tail section flue, a feeding pipe groove, an oxygen gun mouth, a nitrogen sealing device, a manhole, a micro-differential pressure taking device, a hanger and the like, and the working principle is as follows: the high-temperature flue gas generated by burning fuel oil, fuel gas and fire coal releases heat, enters the hearth, then enters the waste heat recovery device of the front smoke box, then enters the smoke and fire tube, and finally enters the waste heat recovery device in the flue of the rear smoke box, and the high-temperature flue gas is changed into low-temperature flue gas which is discharged into the atmosphere through the chimney.
At present, a gas turbine waste heat boiler is generally provided with a periodic blowdown flash tank and a continuous blowdown flash tank, the flash tank is used for reducing the pressure and cooling the discharged furnace water and sewage, the discharged furnace water and sewage are discharged into a sewage tank and added with new production water to be regulated and cooled and then discharged outside, part of furnace water generates steam in a normal pressure state, the steam generated by the continuous blowdown flash tank is used for heating a deaerator, the steam generated by the periodic blowdown flash tank is exhausted, the temperature of part of furnace water is reduced to be lower than 100 ℃, and the furnace water is cooled again in the blowdown tank and discharged into a trench to be discharged outside. However, the blowdown system of the gas turbine waste heat boiler generally occupies a large area, is expensive and high in use cost, and increases the operation cost of enterprises. Therefore, a continuous blowdown system of a gas turbine exhaust-heat boiler is needed, which can omit a continuous blowdown flash tank, save energy consumption, reduce use cost and improve economic benefits of enterprises.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a continuous blowdown system of gas turbine exhaust-heat boiler novel in structure reasonable, blowdown convenience, saving energy consumption, with low costs.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a continuous blowdown system of a gas turbine waste heat boiler comprises a low-pressure superheater, a low-pressure boiler barrel, a deaerating boiler barrel, a first blowdown pipe, a deaerator, a water storage tank, a second blowdown pipe, a periodic blowdown flash tank and a third blowdown pipe; the outlet of the low-pressure superheater is connected with the inlet of the low-pressure boiler barrel; one end of the first drain pipe is connected with the outlet of the low-pressure boiler barrel, and the other end of the first drain pipe is connected with the inlet of the oxygen-removing boiler barrel; the deoxidizing drum is connected with the deaerator; one end of the second sewage discharge pipe is connected with the outlet of the deoxidizing boiler barrel, and the other end of the second sewage discharge pipe is connected with the water storage tank; one end of the third blow-off pipe is connected with the water storage tank, and the other end of the third blow-off pipe is connected with the inlet of the periodic blow-off flash tank.
According to the continuous blowdown system of the waste heat boiler of the gas turbine, the low-pressure boiler barrel is connected with the low-pressure evaporator and the low-pressure economizer, so that the heat exchange effect is better, the energy consumption is lower, and the economic benefit is more remarkable.
As the continuous blowdown system of the waste heat boiler of the gas turbine, the deoxidizing boiler barrel is connected with the deoxidizing evaporator, the deoxidizing effect is convenient to achieve, the working efficiency is high, and the energy consumption is low.
According to the continuous blowdown system of the gas turbine waste heat boiler, the heat exchanger is arranged in the water storage tank, the second blowdown pipe is connected with the inlet of the heat exchanger, the third blowdown pipe is connected with the outlet of the heat exchanger, so that flue gas can enter the water storage tank through the second blowdown pipe after being subjected to heat exchange through the deoxidizing boiler barrel, and can be discharged into the periodic blowdown flash tank through the third blowdown pipe after being subjected to heat exchange through the heat exchanger, the heat is recycled, the feed water temperature of the boiler is increased, the risk of dewing at the tail part of the boiler is reduced, the corrosion risk at the tail part of the boiler is reduced, and the service life of the boiler is prolonged; and the continuous sewage after heat exchange can be directly discharged to the periodical sewage discharge flash tank, so that the continuous sewage discharge flash tank is omitted, the engineering investment is reduced, the use cost is reduced, and the economic benefit is more remarkable.
The continuous blowdown system of the gas turbine waste heat boiler further comprises a flue gas pipeline, the flue gas pipeline is connected with the low-pressure superheater, the tail end of the flue gas pipeline is connected with a chimney, high-temperature flue gas conveniently enters the low-pressure superheater through the flue gas pipeline, enters the low-pressure boiler barrel after being overheated, enters the deoxygenation boiler barrel through a first blowdown pipe after heat exchange, further deoxygenates and exchanges heat, enters the water storage tank through a second blowdown pipe, directly enters the periodic blowdown flash tank through a third blowdown pipe after further heat exchange through the heat exchanger, sewage is discharged through the periodic blowdown flash tank, and tail gas is discharged through the chimney; because the temperature in the low-pressure boiler barrel is high, the deaerating boiler barrel can be heated by the heat of sewage discharged by the low-pressure boiler barrel, the heat is recycled, and the energy consumption is saved; when the boiler is started, high-temperature steam in the low-pressure boiler barrel directly enters the deoxidizing boiler barrel through the first blow-off pipe, so that the heat exchange of the deoxidizing boiler barrel is accelerated, the time for starting the boiler is shortened, and the working efficiency is higher.
The utility model has the advantages that: the outlet of the low-pressure superheater of the utility model is connected with the inlet of the low-pressure boiler barrel; one end of the first sewage discharge pipe is connected with an outlet of the low-pressure boiler barrel, and the other end of the first sewage discharge pipe is connected with an inlet of the oxygen-removing boiler barrel; the deoxidizing drum is connected with a deaerator; one end of the second sewage discharge pipe is connected with the outlet of the deoxidizing boiler barrel, and the other end of the second sewage discharge pipe is connected with the water storage tank; one end of the third sewage discharge pipe is connected with the water storage tank, and the other end of the third sewage discharge pipe is connected with the inlet of the periodic sewage discharge flash tank; the low-pressure boiler barrel is connected with a low-pressure evaporator and a low-pressure economizer; the deoxygenation boiler barrel is connected with a deoxygenation evaporator; a heat exchanger is arranged in the water storage tank, a second sewage discharge pipe is connected with an inlet of the heat exchanger, and a third sewage discharge pipe is connected with an outlet of the heat exchanger; still include flue gas pipeline, flue gas pipeline connects the low pressure over heater, and flue gas pipeline's end-to-end connection has the chimney, the utility model discloses can be used for the continuous blowdown of gas turbine exhaust-heat boiler, novel structure is reasonable, and the blowdown is convenient, practices thrift the energy consumption, and is with low costs.
Drawings
FIG. 1 is a schematic structural diagram of a continuous blowdown system of a gas turbine waste heat boiler in the embodiment.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1, a continuous blowdown system of a gas turbine exhaust-heat boiler comprises a low-pressure superheater 1, a low-pressure drum 2, a deaerating drum 3, a first blowdown pipe 4, a deaerator 5, a water storage tank 6, a second blowdown pipe 7, a periodic blowdown flash tank 8 and a third blowdown pipe 9; the outlet of the low-pressure superheater 1 is connected with the inlet of the low-pressure boiler barrel 2; one end of the first drain pipe 4 is connected with the outlet of the low-pressure boiler barrel 2, and the other end of the first drain pipe 4 is connected with the inlet of the oxygen-removing boiler barrel 3; the deoxidizing drum 3 is connected with the deaerator 5; one end of the second sewage discharge pipe 7 is connected with the outlet of the deoxidizing boiler barrel 3, and the other end of the second sewage discharge pipe 7 is connected with the water storage tank 6; one end of the third sewage draining pipe 9 is connected with the water storage tank 6, and the other end of the third sewage draining pipe 9 is connected with the inlet of the periodical sewage draining expansion tank 8.
According to the continuous blowdown system of the waste heat boiler of the gas turbine, the low-pressure boiler barrel 2 is connected with the low-pressure evaporator 10 and the low-pressure economizer 11, so that the heat exchange effect is better, the energy consumption is lower, and the economic benefit is more remarkable.
As the continuous blowdown system of the gas turbine waste heat boiler, the deoxidizing boiler barrel 3 is connected with the deoxidizing evaporator 12, so that the deoxidizing effect is better, the working efficiency is higher, and the energy consumption is lower.
According to the continuous blowdown system of the gas turbine waste heat boiler, the heat exchanger 13 is arranged in the water storage tank 6, the second blowdown pipe 7 is connected with the inlet of the heat exchanger 13, the third blowdown pipe 9 is connected with the outlet of the heat exchanger 13, so that flue gas can conveniently enter the water storage tank 6 through the second blowdown pipe 7 after being subjected to heat exchange through the deoxygenation drum 3, and can be discharged into the periodic blowdown flash tank 8 through the third blowdown pipe 9 after being subjected to heat exchange through the heat exchanger 13, the heat is recycled, the feed water temperature of the boiler is improved, the risk of dewing at the tail part of the boiler is reduced, the corrosion risk at the tail part of the boiler is reduced, and the service life of the boiler is prolonged; and the continuous sewage after heat exchange can be directly discharged to the periodic sewage flash tank 8, so that the continuous sewage flash tank is omitted, the engineering investment is reduced, the use cost is reduced, and the economic benefit is more remarkable.
The continuous blowdown system of the gas turbine waste heat boiler further comprises a flue gas pipeline 14, the flue gas pipeline 14 is connected with the low-pressure superheater 1, the tail end of the flue gas pipeline 14 is connected with a chimney 15, high-temperature flue gas conveniently enters the low-pressure superheater 1 through the flue gas pipeline 14, enters the low-pressure boiler barrel 2 after overheating, enters the deoxygenation boiler barrel 3 through the first blowdown pipe 4 after heat exchange, further enters the water storage tank 6 through the second blowdown pipe 7 after further deoxygenation and heat exchange, directly enters the periodic blowdown flash tank 8 through the third blowdown pipe 9 after further heat exchange through the heat exchanger 13, sewage is discharged through the periodic blowdown flash tank 8, and tail gas is discharged through the chimney 15; because the temperature in the low-pressure boiler barrel 2 is high, the heat of the sewage discharged by the low-pressure boiler barrel 2 can heat the deoxidizing boiler barrel 3, so that the heat is recycled, and the energy consumption is saved; and when the boiler started, high-temperature steam in the low-pressure boiler barrel 2 directly enters the deoxidizing boiler barrel 3 through the first exhaust pipe 4, so that the heat exchange of the deoxidizing boiler barrel 3 is accelerated, the time for starting the boiler is shortened, and the working efficiency is higher.
The outlet of the low-pressure superheater 1 of the utility model is connected with the inlet of the low-pressure boiler barrel 2; one end of the first sewage discharge pipe 4 is connected with the outlet of the low-pressure boiler barrel 2, and the other end of the first sewage discharge pipe 4 is connected with the inlet of the deoxidizing boiler barrel 3; the deoxidizing drum 3 is connected with a deaerator 5; one end of a second sewage discharge pipe 7 is connected with the outlet of the deoxidizing boiler barrel 3, and the other end of the second sewage discharge pipe 7 is connected with the water storage tank 6; one end of a third sewage discharge pipe 9 is connected with the water storage tank 6, and the other end of the third sewage discharge pipe 9 is connected with an inlet of the periodic sewage discharge flash tank 8; the low-pressure boiler barrel 2 is connected with a low-pressure evaporator 10 and a low-pressure economizer 11; the deoxygenation boiler barrel 3 is connected with a deoxygenation evaporator 12; a heat exchanger 13 is arranged in the water storage tank 6, a second sewage discharge pipe 7 is connected with an inlet of the heat exchanger 13, and a third sewage discharge pipe 9 is connected with an outlet of the heat exchanger 13; still include flue gas pipeline 14, flue gas pipeline 14 connects low pressure superheater 1, flue gas pipeline 14's end-to-end connection has chimney 15, during the use, high temperature flue gas gets into low pressure superheater 1 through flue gas pipeline 14, overheated back gets into low pressure boiler section of thick bamboo 2, get into deoxidization boiler section of thick bamboo 3 through first blow off pipe 4 after the heat transfer, further deoxidization and heat transfer back, get into storage water tank 6 through second blow off pipe 7, after further heat transfer through heat exchanger 13, directly get into periodic blowdown flash vessel 8 through third dilatation blow off pipe 9, sewage is discharged through periodic blowdown flash vessel 8, tail gas passes through chimney 15 and discharges. The utility model discloses can be used for the continuous blowdown of gas turbine exhaust-heat boiler, novel structure is reasonable, and the blowdown is convenient, practices thrift the energy consumption, and is with low costs.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (5)
1. The utility model provides a continuous blowdown system of gas turbine exhaust-heat boiler which characterized in that: the device comprises a low-pressure superheater (1), a low-pressure boiler barrel (2), a deaerating boiler barrel (3), a first drain pipe (4), a deaerator (5), a water storage tank (6), a second drain pipe (7), a periodic sewage flash tank (8) and a third drain pipe (9); the outlet of the low-pressure superheater (1) is connected with the inlet of the low-pressure boiler barrel (2); one end of the first sewage discharge pipe (4) is connected with the outlet of the low-pressure boiler barrel (2), and the other end of the first sewage discharge pipe (4) is connected with the inlet of the oxygen removal boiler barrel (3); the deoxidizing drum (3) is connected with the deaerator (5); one end of the second sewage discharge pipe (7) is connected with the outlet of the deoxidizing drum (3), and the other end of the second sewage discharge pipe (7) is connected with the water storage tank (6); one end of the third sewage draining pipe (9) is connected with the water storage tank (6), and the other end of the third sewage draining pipe (9) is connected with the inlet of the periodic sewage draining expansion tank (8).
2. The gas turbine waste heat boiler continuous blowdown system of claim 1, wherein: the low-pressure boiler barrel (2) is connected with a low-pressure evaporator (10) and a low-pressure economizer (11).
3. The gas turbine waste heat boiler continuous blowdown system of claim 1, wherein: the deoxygenation boiler barrel (3) is connected with a deoxygenation evaporator (12).
4. The gas turbine waste heat boiler continuous blowdown system of claim 1, wherein: the water storage tank (6) is internally provided with a heat exchanger (13), the second sewage discharge pipe (7) is connected with an inlet of the heat exchanger (13), and the third sewage discharge pipe (9) is connected with an outlet of the heat exchanger (13).
5. The gas turbine waste heat boiler continuous blowdown system of claim 1, wherein: the device is characterized by further comprising a flue gas pipeline (14), wherein the flue gas pipeline (14) is connected with the low-pressure superheater (1), and the tail end of the flue gas pipeline (14) is connected with a chimney (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921404192.7U CN210485682U (en) | 2019-08-27 | 2019-08-27 | Continuous blowdown system of gas turbine exhaust-heat boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921404192.7U CN210485682U (en) | 2019-08-27 | 2019-08-27 | Continuous blowdown system of gas turbine exhaust-heat boiler |
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| Publication Number | Publication Date |
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| CN210485682U true CN210485682U (en) | 2020-05-08 |
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| CN201921404192.7U Active CN210485682U (en) | 2019-08-27 | 2019-08-27 | Continuous blowdown system of gas turbine exhaust-heat boiler |
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- 2019-08-27 CN CN201921404192.7U patent/CN210485682U/en active Active
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