CN111457344A - Reheating power generation system combining combustion boiler and waste heat boiler - Google Patents
Reheating power generation system combining combustion boiler and waste heat boiler Download PDFInfo
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- CN111457344A CN111457344A CN202010223592.9A CN202010223592A CN111457344A CN 111457344 A CN111457344 A CN 111457344A CN 202010223592 A CN202010223592 A CN 202010223592A CN 111457344 A CN111457344 A CN 111457344A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/36—Water and air preheating systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
- F23J1/06—Mechanically-operated devices, e.g. clinker pushers
Abstract
The invention provides a combined reheating power generation system of a combustion boiler and a waste heat boiler, which comprises a steam turbine and the combustion boiler, wherein the steam turbine is connected with a power generator, the steam turbine comprises a steam turbine high-pressure cylinder and a steam turbine low-pressure cylinder, an evaporation water-cooling wall, a steam drum, a high-temperature superheater, a low-temperature superheater, a reheater, an economizer and an air preheater are sequentially arranged in the combustion boiler, the air preheater is connected with a primary fan and a secondary fan, a dust remover, an induced draft fan and a chimney are sequentially connected with an outlet of a tail flue of the combustion boiler, a water outlet of the economizer is connected with a water inlet of the steam drum, a water outlet of the steam drum is connected with an inlet of the evaporation water-cooling wall in the combustion boiler, an outlet of the evaporation water-cooling wall is connected with. The invention greatly reduces the consumption of the fuel for the operation of the combustion power station; and the waste heat boiler does not need to be separately provided with a special steam turbine generator set and a matched electric and automatic instrument system thereof.
Description
Technical Field
The invention belongs to the technical field of thermal power generation, and particularly relates to a combined reheating power generation system of a combustion boiler and a waste heat boiler.
Background
The waste heat power generation technology is based on the principle of waste heat gradient utilization, a large amount of waste gas discharged in industrial production is subjected to heat exchange recovery by a waste heat boiler, and superheated steam is generated to push a steam turbine to realize conversion of heat energy to mechanical energy, so that a generator is driven to generate power. Taking the waste heat power generation of a cement factory as an example, the waste heat power generation technology of the cement kiln is the waste heat recovery of waste gas which is not used in the production process in the novel dry-method cement clinker sintering system.
However, the generated energy of the pure low-temperature waste heat power station is not enough to meet the power required by the production of enterprises, and a combustion-type thermal power generation self-contained power station needs to be built at the same time, so that two power stations are built in the enterprises, two sets of steam turbine generator units, two sets of electrical systems and the like are arranged, and huge pressure is brought to the enterprises from project investment, plant area occupation and construction period, so that the economic benefit of the enterprises is reduced.
Therefore, there is a need in the art for a solution that can improve the overall thermal efficiency of the power plant and reduce the fuel consumption, investment and operating costs.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the combined reheating power generation system of the combustion boiler and the waste heat boiler, which combines the waste heat boiler of the industrial production line and the reheating unit of the combustion boiler of the self-contained power station and effectively reduces the coal consumption of the thermal power plant.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a reheat power generation system is united with exhaust-heat boiler to combustion boiler, includes steam turbine and combustion boiler, the steam turbine is connected with the generator, the steam turbine includes steam turbine high pressure cylinder and steam turbine low pressure cylinder.
The boiler is characterized in that an evaporation water-cooling wall, a steam pocket, a high-temperature superheater, a low-temperature superheater, a reheater, an economizer and an air preheater are sequentially arranged in the boiler, the air preheater is connected with a primary fan and a secondary fan, a dust remover, an induced draft fan and a chimney are sequentially connected with the outlet of a tail flue of the boiler, the water outlet of the economizer is connected with the water inlet of the steam pocket, the water outlet of the steam pocket is connected with the inlet of the evaporation water-cooling wall in the boiler, the outlet of the evaporation water-cooling wall is connected with the steam inlet of the steam pocket, and the steam outlet of the steam pocket is connected with the inlet of the low-temperature superheater.
And the steam outlet of the high-pressure turbine cylinder is connected with the steam inlets of the reheater and the high-pressure heater, and the steam outlet of the reheater is connected with the steam inlet of the low-pressure turbine cylinder. And a steam outlet of the steam turbine low-pressure cylinder is respectively connected with steam inlets of the condensing equipment, the low-pressure heater and the thermal deaerator, and a water outlet of the condensing equipment is connected with a water inlet of the condensate pump.
The water outlet of the condensate pump is divided into two paths, and is connected with the water inlet of the vacuum deaerator, the water outlet of the vacuum deaerator is connected with the water inlet of the waste heat boiler water supply pump, the water outlet of the waste heat boiler water supply pump is connected with the coal economizer inlet of the waste heat boiler, and the superheater outlet of the waste heat boiler is connected with the water inlet of the reheater.
Another way with low pressure feed water heater connects, low pressure feed water heater's delivery port with the water inlet of heating power oxygen-eliminating device is connected, the delivery port of heating power oxygen-eliminating device is connected with the water inlet of combustion boiler feed water pump, the delivery port of combustion boiler feed water pump is connected with high pressure feed water heater's water inlet, high pressure feed water heater's delivery port and the water inlet of economizer are connected.
The high pressure heater includes one-level high pressure heater and second grade high pressure heater, the steam outlet of steam turbine high pressure jar includes high pressure extraction steam port and low pressure steam extraction mouth, one-level high pressure heater's steam inlet with the low pressure steam extraction mouth of steam turbine high pressure jar is connected, second grade high pressure heater's steam outlet with the high pressure extraction steam port of steam turbine high pressure jar links to each other.
The low pressure heater includes one-level low pressure heater, second grade low pressure heater and tertiary low pressure heater, the steam outlet of steam turbine low pressure jar includes first extraction steam port, second extraction steam port, third extraction steam port, fourth extraction steam port and low pressure steam extraction mouth, first extraction steam port, second extraction steam port, third extraction steam port, fourth extraction steam port and low pressure steam extraction mouth in proper order respectively with the steam inlet of heating power oxygen-eliminating device, one-level low pressure heater, second grade low pressure heater, tertiary low pressure heater and condensing equipment is connected, one-level low pressure heater's water inlet with condensate pump's delivery port is connected, and tertiary low pressure heater's delivery port is connected with the water inlet of heating power oxygen-eliminating device.
The bottom of the combustion boiler is sequentially provided with a slag cooler, slag conveying equipment and a slag bin.
Compared with the prior art, the invention has the beneficial effects that: the method comprises the following steps of combining a combustion boiler with a waste heat boiler, introducing low-pressure steam of the waste heat boiler and exhaust steam of a high-pressure cylinder of a steam turbine into a reheater in the combustion boiler, further increasing the temperature of the steam, improving the quality of the steam, and then enabling the steam to enter a low-pressure cylinder of the steam turbine; and the waste heat boiler does not need to be separately provided with a special steam turbine generator set and a matched electric system, so that one steam turbine generator set is omitted, the occupied area of a factory building and the construction cost are saved, the project investment is reduced, and the project construction period is shortened.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Reference numerals: 1-combustion boiler, 2-high temperature superheater, 3-low temperature superheater, 4-reheater, 5-economizer, 6-air preheater, 7-primary air fan, 8-secondary air fan, 9-dust remover, 10-induced draft fan, 11-chimney, 12-waste heat boiler, 13-waste heat boiler water-feeding pump, 14-combustion boiler water-feeding pump, 15-vacuum deaerator, 16-condensate pump, 17-condensing equipment, 18-low pressure heater, 19-secondary high pressure heater, 20-thermal deaerator, 21-turbine high pressure cylinder, 22-turbine low pressure cylinder, 23-generator, 24-slag bin, 25-slag conveying equipment, 26-slag cooler, 27-primary high pressure heater, 28-evaporation water wall, 29-steam drum, 30-high pressure heater, 31-first low pressure heater, 32-second low pressure heater and 33-third low pressure heater.
Detailed Description
The combustion boiler and exhaust-heat boiler combined reheating power generation system shown in fig. 1 comprises a steam turbine and the combustion boiler 1, wherein the steam turbine is connected with a power generator 23, the steam turbine comprises a steam turbine high-pressure cylinder 21 and a steam turbine low-pressure cylinder 22, and steam in the steam turbine high-pressure cylinder 21 and the steam turbine low-pressure cylinder 22 pushes the steam turbine to do work to drive the power generator 23 to generate power.
The combustion boiler 1 can adopt various combustion type boilers such as a pulverized coal furnace, a circulating fluidized bed boiler, a grate furnace and the like, in the embodiment, the combustion boiler 1 adopts the pulverized coal furnace, a high-temperature superheater 2, a low-temperature superheater 3, a reheater 4, an economizer 5 and an air preheater 6 are sequentially arranged in the combustion boiler 1, the air preheater 6 is connected with a primary air fan 7 and a secondary air fan 8, a bottom flue of the combustion boiler 1 is sequentially connected with a dust remover 9, an induced draft fan 10 and a chimney 11, a water outlet of the economizer 5 is connected with a water inlet of a steam pocket 29, a water outlet of the steam pocket 29 is connected with an inlet of an evaporation water cooling wall 28 in the combustion boiler 1, an outlet of the evaporation water cooling wall 28 is connected with a steam inlet of the steam pocket 29, and a steam outlet of the steam pocket 29 is connected with an inlet of.
The steam inlet of the high-temperature steam turbine cylinder 21 is connected with the steam outlet of the high-temperature superheater 2, the steam outlet of the high-temperature steam turbine cylinder 21 is connected with the reheater 4 and the steam inlet of the high-pressure heater 30, and the steam outlet of the reheater 4 is connected with the steam inlet of the low-temperature steam turbine cylinder 22.
The high pressure heater 30 is used for heating boiler feed water, and high temperature and high pressure steam extraction and exhaust steam from the high pressure cylinder 21 of the steam turbine enters the high pressure heater 30 to heat the boiler feed water from the thermal deaerator 20. In this embodiment, the high pressure heater 30 is a two-stage heater, and includes a first-stage high pressure heater 27 and a second-stage high pressure heater 19, the first-stage high pressure heater 27 and the second-stage high pressure heater 19 are connected end to end, a water outlet of the first-stage high pressure heater 27 is connected to a water inlet of the second-stage high pressure heater 19, a steam inlet of the first-stage high pressure heater 27 is connected to a low-pressure steam outlet of the turbine high pressure cylinder 21, and a steam inlet of the second-stage high pressure heater 19 is connected to a high-pressure steam extraction. The high-temperature high-pressure extraction steam which does work in the steam turbine high-pressure cylinder 21 respectively enters the two-stage heaters to heat boiler feed water of the combustion boiler 1, the boiler feed water sequentially passes through the first-stage high-pressure heater 27 and the second-stage high-pressure heater 19, is further heated by high-temperature exhaust steam, and finally enters the economizer 5 of the combustion boiler 1.
The steam inlet of the high-temperature steam turbine cylinder 21 is connected with the steam outlet of the high-temperature superheater 2, the steam outlet of the high-temperature steam turbine cylinder 21 is connected with the reheater 4 and the steam inlet of the high-pressure heater 30, and the steam outlet of the reheater 4 is connected with the steam inlet of the low-temperature steam turbine cylinder 22. The steam outlet of the steam turbine low-pressure cylinder 22 is respectively connected with the steam inlets of the condensing equipment 17, the low-pressure heater 18 and the thermal deaerator 20, and the water outlet of the condensing equipment 17 is connected with the water inlet of the condensate pump 16.
The low pressure heater 18 is used for preheating the condensed water, and the high temperature and low pressure steam extracted from the low pressure cylinder 22 of the steam turbine enters the low pressure heater 18 to heat the condensed water. In this embodiment, the low pressure heater 18 is a three-stage heater, that is, it includes a first-stage low pressure heater 31, a second-stage low pressure heater 32 and a third-stage low pressure heater 33 connected end to end, the steam outlet of the turbine low pressure cylinder 22 is a first steam extraction port, a second steam extraction port, a third steam extraction port, a fourth steam extraction port and a low pressure steam exhaust port which are sequentially arranged, the first steam extraction port, the second steam extraction port, the third steam extraction port, the fourth steam extraction port and the low pressure steam exhaust port are sequentially connected with the thermal deaerator 20, the first-stage low pressure heater 31, the second-stage low pressure heater 32, the third-stage low pressure heater 33 and the steam inlet of the condensing device 17, respectively, the water inlet of the first-stage low pressure heater 31 is connected with the water outlet of the condensate pump 16, the water outlet of the third-stage low pressure heater 33 is connected with the water inlet of the thermal deaerator 20, the high temperature low pressure steam, heating the condensed water in the condensed water pipeline. The condensed water is heated step by step and then enters the thermal deaerator 20 as boiler feed water for the combustion boiler 1.
In the thermal deaerator 20, the amount of gas dissolved in the water is proportional to the partial pressure of the gas above the water surface. The water supply is heated by steam to raise the temperature of water, so that the partial pressure of steam on the water surface is gradually increased, the partial pressure of dissolved gas is gradually reduced, the gas dissolved in water can continuously escape, when the water is heated to the boiling temperature under the corresponding pressure, all the water surface is the steam, the partial pressure of the dissolved gas is zero, and the water no longer has the capacity of dissolving gas, namely, the gas dissolved in the water, including oxygen, can be removed.
A vacuum deaerator 15 is a device for boiling water at low temperature under vacuum to remove oxygen, nitrogen, carbon dioxide and other gases in water, and comprises a deaerating water tank deaerator and a vacuum unit, wherein the vacuum unit adopts a water jet pump which takes circulating water as a working medium. The working principle of vacuum deoxygenation is to apply henry's law and dalton's law, from which it is known that in a closed container, any gas is present on the water surface at the same time, and the solubility of the gas is directly proportional to its own partial pressure, and the solubility of the gas is only related to its own partial pressure. Under a certain pressure, the partial pressure of the water vapor is increased along with the rising of the water temperature, the partial pressure of the air and the oxygen is smaller and smaller, and the oxygen in the water continuously escapes, so that the effect of removing oxygen is achieved. The deoxygenation method is carried out at the temperature of 30-60 ℃, and deoxygenation can be realized at the low-temperature state of the water surface.
The water outlet of the condensate pump 17 is divided into two paths, one path is connected with the water inlet of the vacuum deaerator 15, the water outlet of the vacuum deaerator 15 is connected with the water inlet of the waste heat boiler water feed pump 13, the water outlet of the waste heat boiler water feed pump 13 is connected with the economizer inlet of the waste heat boiler 12, and the superheater outlet of the waste heat boiler 12 is also connected with the steam inlet of the reheater 4; the other path is connected with a low-pressure heater 18, a steam outlet of the low-pressure heater 18 is connected with a water inlet of a thermal deaerator 20, a water outlet of the thermal deaerator 20 is connected with a water inlet of a combustion boiler feed pump 14, a water outlet of the combustion boiler feed pump 14 is connected with a water inlet of a high-pressure heater 30, a water outlet of the high-pressure heater 30 is connected with a water inlet of an economizer 5, in the embodiment, a water outlet of the combustion boiler feed pump 14 is connected with a water inlet of a primary high-pressure heater 27, a water outlet of the primary high-pressure heater 27 is connected with a water inlet of a secondary high-pressure heater 19, and a water outlet of the secondary.
In the present embodiment, the condensation is performed by air cooling, and the condensation device 17 is an air cooling island. In other embodiments of the present invention, the condensation may be performed by a water cooling method, and the condensing device 17 is a condenser.
This power generation system is at the during operation, fuel burning produces high temperature flue gas and slag in the combustion boiler 1, the slag falls into the sediment storehouse of combustion boiler 1 bottom, after the cooling of slag cooler 26, fall into on defeated sediment equipment 25, send to and save in the sediment storehouse 24, the high temperature flue gas that fuel and air burning produced in the combustion boiler 1 furnace is under the effect of draught fan 10, in proper order through high temperature over heater 2, low temperature over heater 3, re-heater 4, economizer 5, air heater 6 is exothermic after, again through dust remover 9 and draught fan 10, discharge to the atmosphere through chimney 11 at last. The air preheater 6 comprises a primary air preheater and a secondary air preheater, the primary air 7 is connected with the primary air preheater and provides primary hot air, the secondary air 8 is connected with the secondary air preheater and provides secondary hot air, and the primary hot air and the secondary hot air are preheated by high-temperature flue gas when passing through the air preheater 6 and then enter the hearth for fuel combustion.
Boiler feed water is heated in the economizer 5 and then enters the steam pocket 29, hot water in the lower half part of the steam pocket 29 enters an inlet of the evaporation water cooling wall 28, a steam-water mixture heated in the evaporation water cooling wall 28 enters the steam pocket 29, saturated steam in the upper half part of the steam pocket 29 enters an inlet of the low-temperature superheater 3, the heated steam enters an inlet of the high-temperature superheater 2, and superheated steam heated by the high-temperature superheater 2 enters the high-pressure steam turbine cylinder 21. The steam pressure in the turbine high-pressure cylinder 21 after work expansion is reduced, a part of the steam enters the secondary high-pressure heater 19, and the rest of the exhaust steam enters the reheater 4.
Steam expanded by the low-pressure turbine cylinder 22 enters the condensing device 17, condensed water discharged from the condensing device 17 is divided into two paths under the action of the condensed water pump 16, the two paths of condensed water are respectively sent to the low-pressure heater 18 and the vacuum deaerator 15, and the condensed water entering the low-pressure heater 18 is heated and then enters the thermal deaerator 20.
The condensed water passing through the thermal deaerator 20 is used as boiler feed water, and is sent to the primary high-pressure heater 27 under the action of the combustion boiler feed water pump 14, and then enters the secondary high-pressure heater 19 from the primary high-pressure heater 27, and finally enters the economizer 5 of the combustion boiler 1.
The condensed water after being deoxidized by the vacuum deaerator 15 enters the waste heat boiler 12 under the action of the waste heat boiler water feeding pump 13 to absorb the waste heat of the high-temperature waste gas in the waste heat boiler 12, the superheated steam at the superheater outlet of the waste heat boiler 12 is converged with the high-temperature steam discharged from the high-pressure steam extraction port of the high-pressure steam extraction cylinder 21 of the steam turbine at the inlet of the reheater 4 to enter the reheater 4 to be superheated and heat-absorbed, and the heated superheated steam is sent to the low-pressure steam turbine cylinder 22 from the outlet of the reheater 4 to continuously push the steam turbine to rotate so as to push the.
The invention skillfully utilizes the reheating energy supply of the combustion boiler 1, combines the waste heat boiler 12 with the combustion boiler 1, and the condensed water absorbs the waste heat of the waste heat boiler 12 and then enters the reheater 4 together with the exhaust steam of the high pressure cylinder 21 of the steam turbine, thereby further improving the steam temperature and the steam quality and then enters the low pressure cylinder 22 of the steam turbine to do work. The invention not only recovers the low-temperature waste heat, but also utilizes the function of the reheater of the combustion boiler to further increase the temperature of the superheated steam of the waste heat boiler, thereby improving the steam quality, reducing the power generation steam consumption of the steam turbine, improving the overall efficiency of the power station and greatly reducing the consumption of the operating fuel of the combustion power station. Meanwhile, a steam turbine generator set is omitted, and a special steam turbine generator set and a matched electric system are not configured in the waste heat boiler, so that the occupied area of a factory building and the construction cost can be greatly saved, and the construction period of a project is shortened.
The above is only a preferred embodiment of the present invention, but the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make several variations and modifications without departing from the inventive concept of the present invention, which fall into the protection scope of the present invention.
Claims (4)
1. A reheating power generation system combining a combustion boiler and a waste heat boiler comprises a steam turbine and the combustion boiler (1), wherein the steam turbine is connected with a power generator (23), the steam turbine comprises a steam turbine high-pressure cylinder (21) and a steam turbine low-pressure cylinder (22), and the reheating power generation system is characterized in that,
an evaporation water-cooling wall (28), a steam pocket (29), a high-temperature superheater (2), a low-temperature superheater (3), a reheater (4), an economizer (5) and an air preheater (6) are sequentially arranged in the combustion boiler (1), the air preheater (6) is connected with a primary fan (7) and a secondary fan (8), a tail flue outlet of the combustion boiler (1) is sequentially connected with a dust remover (9), an induced draft fan (10) and a chimney (11), a water outlet of the economizer (5) is connected with a water inlet of the steam pocket (29), a water outlet of the steam pocket (29) is connected with an inlet of the evaporation water-cooling wall (28), an outlet of the evaporation water-cooling wall (28) is connected with a steam inlet of the steam pocket (29), and a steam outlet of the steam pocket (29) is connected with an inlet of the low-temperature superheater (3);
the steam inlet of the high-temperature steam turbine cylinder (21) is connected with the steam outlet of the high-temperature superheater (2), the steam outlet of the high-temperature steam turbine cylinder (21) is respectively connected with the reheater (4) and the steam inlet of the high-pressure heater (30), and the steam outlet of the reheater (4) is connected with the steam inlet of the low-temperature steam turbine cylinder (22); a steam outlet of the steam turbine low-pressure cylinder (22) is respectively connected with a steam inlet of a condensing device (17), a low-pressure heater (18) and a thermal deaerator (20), and a water outlet of the condensing device (17) is connected with a water inlet of a condensate pump (16);
the water outlet of the condensate pump (17) is divided into two paths, one path of water outlet is connected with the water inlet of a vacuum deaerator (15), the water outlet of the vacuum deaerator (15) is connected with the water inlet of a waste heat boiler water feed pump (13), the water outlet of the waste heat boiler water feed pump (13) is connected with the economizer inlet of a waste heat boiler (12), and the superheater outlet of the waste heat boiler (12) is also connected with the steam inlet of the reheater (4); another way with low pressure feed water heater (18) are connected, the delivery port of low pressure feed water heater (18) with the water inlet of heating power oxygen-eliminating device (20) is connected, the delivery port of heating power oxygen-eliminating device (20) is connected with the water inlet of combustion boiler feed water pump (14), the delivery port of combustion boiler feed water pump (14) is connected with the water inlet of high pressure feed water heater (30), the delivery port of high pressure feed water heater (30) is connected with the water inlet of economizer (5).
2. The combustion boiler and waste heat boiler combined reheating power generation system as claimed in claim 1, wherein the high-pressure heater (30) comprises a primary high-pressure heater (27) and a secondary high-pressure heater (19), the steam outlet of the turbine high-pressure cylinder (21) comprises a high-pressure steam extraction port and a low-pressure steam extraction port, the steam inlet of the primary high-pressure heater (27) is connected with the low-pressure steam extraction port of the turbine high-pressure cylinder (21), and the steam inlet of the secondary high-pressure heater (19) is connected with the high-pressure steam extraction port of the turbine high-pressure cylinder (21).
3. The combined reheating power generation system of a combustion boiler and a waste heat boiler as recited in claim 1, the low-pressure heater (18) comprises a primary low-pressure heater (31), a secondary low-pressure heater (32) and a tertiary low-pressure heater (33), the steam outlet of steam turbine low pressure jar (22) includes first extraction steam port, second extraction steam port, third extraction steam port, fourth extraction steam port and low pressure steam extraction mouth, first extraction steam port, second extraction steam port, third extraction steam port, fourth extraction steam port and low pressure steam extraction mouth in proper order respectively with the steam inlet of heating power oxygen-eliminating device (20), one-level low pressure feed water heater (31), second grade low pressure feed water heater (32), tertiary low pressure feed water heater (33) and condensing equipment (17) is connected, the water inlet of one-level low pressure feed water heater (31) with the delivery port of condensate pump (16) is connected, and the delivery port of tertiary low pressure feed water heater (33) is connected with the water inlet of heating power oxygen-eliminating device (20).
4. The combined reheating power generation system of the combustion boiler and the waste heat boiler as claimed in claim 1, wherein a slag cooler (26), a slag conveying device (25) and a slag bin (24) are sequentially arranged at the bottom of the combustion boiler (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223592.9A CN111457344A (en) | 2020-03-26 | 2020-03-26 | Reheating power generation system combining combustion boiler and waste heat boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010223592.9A CN111457344A (en) | 2020-03-26 | 2020-03-26 | Reheating power generation system combining combustion boiler and waste heat boiler |
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| CN111457344A true CN111457344A (en) | 2020-07-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032700A (en) * | 2020-07-29 | 2020-12-04 | 国电泉州热电有限公司 | Heating system and cogeneration system |
| CN114459011A (en) * | 2021-12-31 | 2022-05-10 | 东方电气集团东方锅炉股份有限公司 | Steam-water system with safe heating surface for circulating fluidized bed boiler after power failure and operation method |
-
2020
- 2020-03-26 CN CN202010223592.9A patent/CN111457344A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032700A (en) * | 2020-07-29 | 2020-12-04 | 国电泉州热电有限公司 | Heating system and cogeneration system |
| CN114459011A (en) * | 2021-12-31 | 2022-05-10 | 东方电气集团东方锅炉股份有限公司 | Steam-water system with safe heating surface for circulating fluidized bed boiler after power failure and operation method |
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