CN210319982U - System for supplying high-pressure washing water of air preheater by utilizing high-pressure continuous drainage of boiler of thermal power plant - Google Patents
System for supplying high-pressure washing water of air preheater by utilizing high-pressure continuous drainage of boiler of thermal power plant Download PDFInfo
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- CN210319982U CN210319982U CN201920922767.8U CN201920922767U CN210319982U CN 210319982 U CN210319982 U CN 210319982U CN 201920922767 U CN201920922767 U CN 201920922767U CN 210319982 U CN210319982 U CN 210319982U
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Abstract
The utility model discloses an utilize system of even drainage supply air preheater high pressure sparge water of thermal power plant boiler high pressure, including boiler drum, main sewage pipes and air heater, the access connection of main sewage pipes is to the blowdown export of boiler drum, air heater includes the air heater body and locates wash the subassembly on the air heater body, the pipeline that washes of washing the subassembly intercommunication to main sewage pipes is used for the guide high pressure water in the main sewage pipes is right treat on the air heater body and wash. The technical scheme of the utility model in, high pressure water process in the boiler steam pocket leading-in extremely behind the main blowdown pipeline in the washing pipeline of air heater's the subassembly that washes, it is direct right this internal piece of washing of treating of air heater washes, make full use of the energy of the interior exhaust high pressure water of boiler steam pocket, reduce the waste of the energy.
Description
Technical Field
The utility model relates to a thermal power generation technical field, in particular to utilize system of even drainage supply air preheater high pressure sparge water of boiler high pressure of thermal power plant.
Background
Continuous blowdown (hereinafter referred to as continuous drainage) of a boiler of a thermal power plant is an important means for ensuring the steam-water quality of the boiler, and at present, a domestic boiler continuous drainage system of the thermal power plant mainly adopts the following modes: high pressure blowdown sewage gets into continuous blowdown flash tank, and the steam that produces after the step-down dilatation is used for heating the hot water of oxygen-eliminating device, and the low pressure saturation drainage of production then discharges into unit water drainage tank after stepping down through periodic blowdown ware, and above processing mode makes the energy of high pressure water not effectively utilized, and the energy waste is showing.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize system of even drainage supply air preheater high pressure sparge water of thermal power plant's boiler high pressure, aim at the energy of the high pressure water of make full use of boiler drum exhaust of being convenient for, reduce the waste of the energy.
In order to achieve the above object, the utility model provides an utilize system of even drainage supply air preheater high pressure sparge water of boiler high pressure of thermal power plant, include:
a boiler drum;
the inlet of the main sewage draining pipeline is connected to the sewage draining outlet of the boiler steam drum; and the number of the first and second groups,
the air preheater comprises an air preheater body and a washing assembly arranged on the air preheater body, wherein a washing pipeline of the washing assembly is communicated to the main sewage discharge pipeline and used for guiding high-pressure water in the main sewage discharge pipeline to wash a piece to be washed on the air preheater body.
Optionally, the flushing device further comprises a first communication pipeline, an inlet of the first communication pipeline is communicated with the main sewage draining pipeline, and an outlet of the first communication pipeline is connected to an inlet of the flushing pipeline of the flushing assembly.
Optionally, a first flow regulating valve is arranged on the first communication pipeline.
Optionally, a first manual stop valve is further arranged on the first communication pipeline, and the first manual stop valve and the first flow regulating valve are arranged in series.
Optionally, the method further comprises:
a continuous blowdown flash tank; and the number of the first and second groups,
and the two branch sewage pipes are arranged in parallel, one end of each branch sewage pipe is communicated with the outlet of the main sewage pipe, and the other end of each branch sewage pipe is communicated with the inlet of the continuous sewage flash tank.
Optionally, at least one of the two branch sewage pipes is provided with a second flow regulating valve.
Optionally, the method further comprises:
a fixed-row flash tank;
the first blowdown pipeline is communicated with the continuous blowdown flash tank and the fixed-discharge flash tank; and the number of the first and second groups,
the electric dust remover comprises an electric dust removing body and a heating pipeline arranged on the electric dust removing body, wherein an inlet of the heating pipeline is communicated to the first sewage discharge pipeline and used for guiding hot water in the first sewage discharge pipeline to heat the electric dust removing body.
Optionally, the heating device further comprises a second communication pipeline, an inlet of the second communication pipeline is communicated with the first sewage draining pipeline, and an outlet of the second communication pipeline is connected to an inlet of the heating pipeline.
Optionally, a third flow regulating valve is arranged on the second communication pipeline.
Optionally, a second manual stop valve is further arranged on the second communicating pipeline, and the second manual stop valve and the third flow regulating valve are arranged in series.
The technical scheme of the utility model in, high pressure water process in the boiler steam pocket leading-in extremely behind the main blowdown pipeline in the washing pipeline of air heater's the subassembly that washes, it is direct right this internal piece of washing of treating of air heater washes, make full use of the energy of the interior exhaust high pressure water of boiler steam pocket, reduce the waste of the energy.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is the structural schematic diagram of an embodiment of the system for supplying high-pressure washing water to the air preheater by using high-pressure continuous drainage of the boiler of the thermal power plant.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Continuous blowdown (hereinafter referred to as continuous drainage) of a boiler of a thermal power plant is an important means for ensuring the steam-water quality of the boiler, and at present, a domestic boiler continuous drainage system of the thermal power plant mainly adopts the following modes: high pressure blowdown sewage gets into continuous blowdown flash tank, and the steam that produces after the step-down dilatation is used for heating the hot water of oxygen-eliminating device, and the low pressure saturation drainage of production then discharges into unit water drainage tank after stepping down through periodic blowdown ware, and above processing mode makes the energy of high pressure water not effectively utilized, and the energy waste is showing.
To the above defect, the utility model provides an utilize system of heat-engine plant boiler high pressure even drainage supply air preheater high pressure sparge water, figure 1 does the utility model provides an utilize system of heat-engine plant boiler high pressure even drainage supply air preheater high pressure sparge water's an embodiment's schematic diagram.
Referring to fig. 1, the system 100 for supplying high-pressure flushing water to an air preheater by using high-pressure continuous drainage of a boiler in a thermal power plant comprises a boiler drum 1, a main drainage pipeline 2 and an air preheater 3, wherein an inlet of the main drainage pipeline 2 is connected to a drainage outlet of the boiler drum 1, the air preheater 3 comprises an air preheater body and a flushing assembly arranged on the air preheater body, and a flushing pipeline of the flushing assembly is communicated to the main drainage pipeline 2 and is used for guiding high-pressure water in the main drainage pipeline 2 to flush a piece to be flushed on the air preheater body.
The technical scheme of the utility model in, high pressure water process in the boiler drum 1 leading-in extremely behind the main sewage pipes 2 in the washing pipeline of the washing subassembly of air heater 3, it is direct right this internal piece of washing of treating of air heater washes, make full use of the energy of the interior exhaust high pressure water of boiler drum 1, reduce the waste of the energy.
It should be noted that the boiler drum 1 is a cylindrical pressure vessel for performing steam-water separation and steam purification, forming a water circulation loop and storing boiler water, and water and/or steam in the boiler drum 1 has a higher pressure; air heater 3 is also called air preheater for short, improve boiler heat exchange performance, reduce the preheating apparatus of calorific loss, air heater 3 is the heating surface of preheating the air that gets into before the boiler to the uniform temperature through inside fin, be used for improving the heat exchange performance of boiler, reduce energy consumption, the condition of serious stifled ash can appear usually in air heater 3's heat transfer element, after stifled ash takes place, air heater 3's the flue gas side and the pressure differential of air side are too big, can make the air leak to the flue gas side from sealed clearance, influence the heat transfer effect, and system resistance increases, the power consumptive time of wind cigarette system will rise by a wide margin, consequently, adopt high-pressure squirt to wash air heater 3's heat transfer element.
In the technical scheme of the utility model, mainly leading the high pressure water in the main sewage pipeline 2 into the high pressure water gun of the air preheater 3 to wash the heat transfer element, in the embodiment of the utility model, the air preheater body can be a combination of other structures except the high pressure water gun, in addition, in the embodiment of the utility model, the connection is realized through the first communication pipeline 4, specifically, the system 100 for supplying the high pressure washing water of the air preheater by utilizing the high pressure continuous drainage of the boiler of the thermal power plant also comprises the first communication pipeline 4, the inlet of the first communication pipeline 4 is communicated with the main sewage pipeline 2, the outlet of the first communication pipeline 4 is connected with the inlet of the washing pipeline of the washing component, the communication between the washing pipeline of the washing component and the main sewage pipeline 2 can be realized through the external pipeline, the first communication line 4 may be provided in the form of a hose or a rigid pipe (e.g., a steel pipe).
In addition, the flow rate of the first communication line 4 needs to be controlled, specifically, a first flow rate adjusting valve 41 is provided on the first communication line 4, and at the same time, during maintenance or testing, the flow of water and/or steam supplied to the first communication line 4 needs to be blocked, at this time, a first manual stop valve 42 is further provided on the first communication line 4, and the first manual stop valve 42 and the first flow rate adjusting valve 41 are provided in series, and in a normal state, the first manual stop valve 42 is in an open state, and during maintenance, the first communication line 4 is closed by the first manual stop valve 42.
In this embodiment, the system 100 for supplying high-pressure flushing water to the air preheater by using high-pressure continuous drainage of the boiler in the thermal power plant further includes a continuous drainage flash tank 5 and two branch drainage pipelines 6, wherein the two branch drainage pipelines 6 are arranged in parallel, one end of each branch drainage pipeline 6 is communicated with the outlet of the main drainage pipeline 2, and the other end of each branch drainage pipeline is communicated with the inlet of the continuous drainage flash tank 5, so that the water in the boiler drum 1 is conveniently drained into the continuous drainage flash tank for pressure reduction and flash expansion.
It should be noted that the continuous blowdown flash tank 5 is also called a continuous blowdown expander, is connected with a continuous blowdown port of a boiler, and is used for reducing pressure and expanding volume of continuous blowdown of the boiler, blowdown water is adiabatically expanded and separated into secondary steam and waste hot water in the continuous blowdown expander, and is subjected to expansion, pressure reduction, heat exchange and then discharge in the expander, the secondary steam is led out by a special pipeline, and the continuous blowdown flash tank 5 belongs to the prior art, and is not described in detail herein.
In addition, the flow rate of the branch sewage pipes 6 needs to be controlled, specifically, at least one of the two branch sewage pipes 6 is provided with a second flow regulating valve 61, one of the two branch sewage pipes 6 may be provided with the second flow regulating valve 61, or the two branch sewage pipes 6 are respectively provided with one second flow regulating valve 61, which is not particularly limited, so that the flow rate of the two branch sewage pipes 6 can be conveniently controlled.
In further consideration of the heat of the continuous drainage, in the embodiment of the present invention, the system 100 for supplying the high-pressure flushing water to the air preheater by utilizing the high-pressure continuous drainage of the boiler of the thermal power plant further comprises a fixed-row flash tank 7, a first drainage pipeline 8 and an electric dust collector 9, wherein the fixed-row flash tank 7 is communicated with the continuous drainage flash tank 5 and the fixed-row flash tank 7, the electric dust collector 9 comprises an electric dust collector body and a heating pipeline arranged on the electric dust collector body, an inlet of the heating pipeline is communicated with the first drainage pipeline 8 for guiding the hot water in the first drainage pipeline 8 to heat the electric dust collector body, the high-pressure water in the boiler steam pocket 1 passes through the continuous drainage flash tank 5 and then becomes low-pressure saturated drain, flows through the first drainage pipeline 8 and is guided into the heating pipeline of the electric dust collector body to heat the electric dust collector body, the heat energy discharged by the boiler steam drum 1 is fully utilized, and the waste of energy is reduced.
It should be noted that, the periodic blowdown flash tank is also called as a fixed-discharge flash tank 7, the fixed-discharge flash tank 7 is used for draining the periodic blowdown water of the boiler, and the waste hot water is generally discharged into a drainage system through a blowdown cooling tank; the electrostatic precipitator 9 is the granule smoke and dust in discharging the flue gas with coal fired boiler and clears away to reduce the smoke and dust volume of discharging into the atmosphere by a wide margin, this is the important environmental protection equipment who improves environmental pollution, improves air quality, the ash that the ash bucket of electrostatic precipitator 9 smoothly exported the storage is the assurance of dust remover normal operating, and defeated ash is not smooth will lead to the stifled ash of dust remover, dust discharge accident such as exceeding standard, and when the ash bucket temperature was higher than the flue gas dew point, can avoid adhesion, compression or the caking of dust and lead to stifled ash, spout the ash phenomenon, the higher the temperature of ash is, the mobility of ash is just stronger, and it is just easy just also to carry, consequently, need right the ash bucket of electrostatic precipitator 9 heats, adopts the steam heating mode to be current comparatively general heating mode.
Steam heating mode adopts coil heater to carry out the local heating to the ash bucket, coil heater includes the disc heating pipe leading-in hot water and/or steam in the heating pipe are right the electric precipitation body heats, make full use of the heat energy of 1 continuous rows of boiler drum has reduced the waste of the energy.
The embodiment of the utility model provides an in, the heating pipeline with first blowdown pipeline 8 is linked together through second intercommunication pipeline 10, specifically, utilize system 100 of thermal power plant's boiler high pressure even drainage supply air preheater high pressure sparge water still includes second intercommunication pipeline 10, the entry of second intercommunication pipeline 10 communicate in first blowdown pipeline 8, the exit linkage of second intercommunication pipeline 10 in the entry of heating pipeline can realize through external pipeline the heating pipeline with the intercommunication of first blowdown pipeline 8 can set up to the form of hose, also can set up to the form (for example steel pipe) of rigid pipe.
In addition, the flow rate of the second communication pipeline 10 needs to be controlled, specifically, a third flow rate adjusting valve 101 is provided on the second communication pipeline 10, and at the same time, during maintenance or testing, the flow of water and/or steam supplied to the second communication pipeline 10 needs to be blocked, at this time, a second manual stop valve 102 is further provided on the second communication pipeline 10, the second manual stop valve 102 and the third flow rate adjusting valve 101 are arranged in series, in a normal state, the second manual stop valve 102 is in an open state, and during maintenance, the second communication pipeline 10 is closed by the second manual stop valve 102.
The above is only the optional embodiment of the present invention, and not therefore the limit to the patent scope of the present invention, all the concepts of the present invention utilize the equivalent structure transformation of the content of the specification and the attached drawings, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (10)
1. A system for supplying air preheater high pressure flush water using a thermal power plant boiler high pressure continuous drain, comprising:
a boiler drum;
the inlet of the main sewage draining pipeline is connected to the sewage draining outlet of the boiler steam drum; and the number of the first and second groups,
the air preheater comprises an air preheater body and a washing assembly arranged on the air preheater body, wherein a washing pipeline of the washing assembly is communicated to the main sewage discharge pipeline and used for guiding high-pressure water in the main sewage discharge pipeline to wash a piece to be washed on the air preheater body.
2. The system for supplying air preheater high pressure washing water using boiler high pressure sewer piping of a thermal power plant according to claim 1, further comprising a first communication line, an inlet of said first communication line being communicated with said main sewage line, and an outlet of said first communication line being connected to an inlet of a washing line of said washing unit.
3. The system for supplying air preheater high pressure washing water using heat-engine plant boiler high pressure sewer piping according to claim 2, wherein a first flow rate adjusting valve is provided on said first communication line.
4. The system for supplying air preheater high pressure washing water using boiler high pressure connecting drain of thermal power plant according to claim 3, wherein a first manual cut-off valve is further provided on said first communication line, and said first manual cut-off valve is provided in series with said first flow rate adjusting valve.
5. The system for supplying air preheater high pressure flush water using a thermal power plant boiler high pressure continuous drain as set forth in claim 1, further comprising:
a continuous blowdown flash tank; and the number of the first and second groups,
and the two branch sewage pipes are arranged in parallel, one end of each branch sewage pipe is communicated with the outlet of the main sewage pipe, and the other end of each branch sewage pipe is communicated with the inlet of the continuous sewage flash tank.
6. The system for supplying air preheater high pressure flush water using a thermal power plant boiler high pressure sewer according to claim 5, wherein at least one of said two branch sewage pipes is provided with a second flow rate adjusting valve.
7. The system for supplying air preheater high pressure washing water using a thermal power plant boiler high pressure continuous drainage as set forth in claim 5, further comprising:
a fixed-row flash tank;
the first blowdown pipeline is communicated with the continuous blowdown flash tank and the fixed-discharge flash tank; and the number of the first and second groups,
the electric dust remover comprises an electric dust removing body and a heating pipeline arranged on the electric dust removing body, wherein an inlet of the heating pipeline is communicated to the first sewage discharge pipeline and used for guiding hot water in the first sewage discharge pipeline to heat the electric dust removing body.
8. The system for supplying air preheater high pressure washing water using boiler high pressure sewer piping of a thermal power plant according to claim 7, further comprising a second communication line, an inlet of said second communication line being communicated with said first sewerage line, and an outlet of said second communication line being connected to an inlet of said heating line.
9. The system for supplying air preheater high pressure washing water using boiler high pressure continuous drainage of a thermal power plant according to claim 8, wherein a third flow rate adjusting valve is provided on said second communication line.
10. The system for supplying air preheater high pressure flush water using a thermal power plant boiler high pressure connecting drain as set forth in claim 9, wherein a second manual cut-off valve is further provided on said second communicating pipe, and said second manual cut-off valve is provided in series with said third flow rate adjusting valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922767.8U CN210319982U (en) | 2019-06-18 | 2019-06-18 | System for supplying high-pressure washing water of air preheater by utilizing high-pressure continuous drainage of boiler of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920922767.8U CN210319982U (en) | 2019-06-18 | 2019-06-18 | System for supplying high-pressure washing water of air preheater by utilizing high-pressure continuous drainage of boiler of thermal power plant |
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| CN210319982U true CN210319982U (en) | 2020-04-14 |
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| CN201920922767.8U Active CN210319982U (en) | 2019-06-18 | 2019-06-18 | System for supplying high-pressure washing water of air preheater by utilizing high-pressure continuous drainage of boiler of thermal power plant |
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