CN111879169A - Online air compression purging method and online air compression purging system for power plant condenser - Google Patents
Online air compression purging method and online air compression purging system for power plant condenser Download PDFInfo
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- CN111879169A CN111879169A CN202010777178.2A CN202010777178A CN111879169A CN 111879169 A CN111879169 A CN 111879169A CN 202010777178 A CN202010777178 A CN 202010777178A CN 111879169 A CN111879169 A CN 111879169A
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- condenser
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G1/00—Non-rotary, e.g. reciprocated, appliances
- F28G1/16—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris
- F28G1/163—Non-rotary, e.g. reciprocated, appliances using jets of fluid for removing debris from internal surfaces of heat exchange conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G15/00—Details
- F28G15/003—Control arrangements
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- Combustion & Propulsion (AREA)
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Abstract
The invention discloses an on-line compressed air purging method and a purging system for a power plant condenser, wherein a gas storage tank in the purging system is arranged outside the condenser and used for storing a certain amount of compressed air and ensuring continuous purging of a heat exchange tube in the condenser; the air inlet purging device is arranged in a front water chamber in the condenser, is connected with the vertical positioning device through a propelling device, is communicated with the air storage tank and is used for injecting high-pressure air in the air storage tank into a group of heat exchange tubes of the condenser; the exhaust receiving device is arranged in a rear water chamber in the condenser, is connected with the vertical positioning device through a propelling device and is used for collecting gas-liquid mixture from the heat exchange tube; the liquid return separation tank is arranged outside the condenser, is communicated with the recovery device and is used for collecting gas, liquid and substances, performing gas-liquid separation, recovering circulating water and discharging exhaust gas. The invention adopts a pure physical cleaning method, does not corrode condenser tubes and has no chemical pollution.
Description
Technical Field
The invention relates to the field of power plant condenser cleaning, in particular to a method and a system for online air compression and blow washing of a power plant condenser.
Background
The main cleaning method of the existing power plant is a combined cleaning method of rubber balls, circulating water dosing and off-line high-pressure water cleaning.
1) The method for cleaning the existing condenser rubber ball comprises the following steps: a large amount of rubber balls are put into the water side of the condenser, flow along with circulating water, and pass through a heat exchange tube of the condenser to randomly clean the heat exchange tube, so that the condenser can play a certain descaling role, but has the following main problems: the rubber ball cannot be too large and too hard, otherwise, the rubber ball cannot pass through a heat exchange tube of the condenser, but is too small and too soft, so that the descaling effect is influenced, and the recovery rate of the rubber ball is reduced. In addition, the rubber ball cleaning method also depends on the flow velocity of circulating water, the temperature of the circulating water in winter is low, the flow cannot be large, otherwise, condensed water is generated to be overcooled, so that the running economy of a unit is reduced, the flow rate is reduced due to the reduction of the flow, the rubber ball cleaning effect is reduced, the cleaning rate of a condenser is reduced, and the minimum cleaning rate can reach 0.4 (the design value is 0.85). For a system adopting reclaimed water as circulating water, the effect is worse, so that how to use the rubber balls is a difficult problem which always troubles a power plant. Above CNK, a large number of articles about rubber ball improvement can be found to prove the rubber ball improvement, but the same problems can occur after the rubber ball is operated for a period of time after the rubber ball is improved, which indicates that the rubber ball cleaning has the major defects that the rubber ball cleaning depends on the flow rate of circulating water, and the ball receiving rate and the cleaning effect are difficult to achieve.
2) The on-line chemical cleaning method of the condenser comprises the following steps: at present, almost all power plants are added with a large amount of chemical cleaning agents (mainly acid, corrosion inhibitor and algaecide which are also added with a large amount of alkali for neutralizing and discharging) in a circulating water pool of a condenser on the basis of putting into rubber ball cleaning so as to prevent the scaling of a heat exchange pipe and the growth of algae. Along with the increase of the unit capacity, the quantity of circulating cooling water is larger and larger, the 300MW unit is about 40000t/h, the evaporation capacity of the circulating cooling water of the cooling tower is about 850t/h, more units of 600MW and 1000MW are provided, in order to ensure the scale inhibition and sterilization effects and maintain the low PH value of the circulating cooling water, the dosing quantity is conceivable, taking the 300MW unit as an example, the dosing cost in one year is about 200 ten thousand yuan. Nevertheless, the effect is not obvious for the unit that adopts reclaimed water (the state has a regulation that the circulating water of the power plant must adopt reclaimed water to avoid adopting underground water) as the circulating cooling water of the power plant, and the unit has to be temporarily stopped and cleaned during the operation period due to serious scaling so as to ensure the operation safety of the unit.
Disclosure of Invention
According to the defects of the prior art, the invention provides an on-line air compressing and purging method and a purging system for a power plant condenser, which are used for solving the defects in the prior art.
The invention is realized according to the following technical scheme:
the utility model provides a power plant's condenser heat exchange tube compressed air blasts system on line, includes:
the air storage tank is arranged outside the condenser and used for storing a certain amount of compressed air and ensuring continuous purging of the heat exchange tube in the condenser;
the air inlet purging device is arranged in a front water chamber in the condenser, and the air storage tank is communicated and used for injecting high-pressure air in the air storage tank into a group of heat exchange tubes of the condenser;
the exhaust system is arranged in a rear water chamber in the condenser and is used for collecting gas-liquid mixture from the heat exchange tube;
the liquid return separation tank is arranged outside the condenser, is communicated with the exhaust system, and is used for collecting gas-liquid mixture, performing gas-liquid separation, recovering circulating water and discharging exhaust gas;
and the liquid return separation tank is connected with the condenser through a liquid discharge pump and is used for conveying the liquid in the liquid return separation tank to the condenser again.
Further, the air inlet purging device comprises a plurality of control valves, wherein one group of heat exchange tubes corresponds to one control valve; the control valves are electrically connected through a wiring bar, the wiring bar is electrically connected with a control cabinet arranged outside the condenser through a cable, and the control cabinet is used for controlling the on-off of the control valves; the inlet of the control valve is provided with an air inlet joint, and a plurality of air inlet joints are communicated with an air storage tank through a guide pipe and then communicated with the air storage tank through an air inlet main pipe; and a self-sealing spray head is installed at the outlet of the control valve and used for purging the heat exchange pipe.
Further, an air inlet control valve group and a pressure gauge are connected in series in the cable; the air inlet control valve group consists of two manual valves and an electric valve; an exhaust port and a liquid level meter are arranged on the liquid return separation tank; an air return hand valve and an air return electric valve bank are connected in series in a guide pipe between the exhaust receiving device and the liquid return separation tank; and a drain pump manual valve is connected in series in a conduit between the liquid return separation tank and the drain pump, and a check valve, a drain electric valve bank and a drain hand valve are connected in series in a conduit between the drain pump and the condenser.
Furthermore, the exhaust system adopts a closed circulating cooling mode and consists of a semi-cylinder, sealing silica gel is arranged at an opening, the height of the sealing silica gel is greater than the distance of the rows of the heat exchange tubes, and the length of the sealing silica gel is required to cover the whole row of the tubes; the exhaust system is connected with the positioning robot and is used for collecting gas-liquid mixture from the heat exchange tube.
Furthermore, the exhaust system adopts an open type circulating cooling mode, an exhaust duct is arranged above a rear water chamber in the condenser, and a steam-water separation device is arranged in the exhaust duct and used for collecting gas-liquid mixture from the heat exchange tube.
An online purging method for compressed air of a heat exchange tube of a condenser of a power plant comprises the following steps:
storing the plant compressed air through an air storage tank;
positioning an air inlet purging device positioned at a front water chamber of the condenser to a row of heat exchange tubes by a positioning robot;
the control cabinet outside the condenser is used for controlling and conducting the air inlet purging device, so that compressed air in the air storage tank purges the heat exchange pipe;
collecting gas and liquid in the heat exchange tube through an exhaust system positioned at a rear water chamber of the condenser;
the exhaust system discharges the collected gas and liquid into a liquid return separation tank positioned outside the condenser;
the liquid return separation tank conveys the liquid into the condenser again through a liquid discharge pump;
after the air inlet purging device finishes purging one row of heat exchange tubes, the air inlet purging device is positioned to the next row of heat exchange tubes through the positioning robot to perform a new purging process.
Further, the air inlet purging device comprises a plurality of control valves, wherein one group of heat exchange tubes corresponds to one control valve; the control valves are electrically connected through a wiring bar, the wiring bar is electrically connected with a control cabinet arranged outside the condenser through a cable, and the control cabinet is used for controlling the on-off of the control valves; the inlet of the control valve is provided with an air inlet joint, and a plurality of air inlet joints are communicated with an air storage tank through a guide pipe and then communicated with the air storage tank through an air inlet main pipe; and a self-sealing spray head is installed at the outlet of the control valve and used for purging the heat exchange tube.
Further, gas in the liquid return separation tank is exhausted to the atmosphere through an exhaust port arranged on the liquid return separation tank; the liquid level in the liquid return separation tank is checked in real time through a liquid level meter arranged on the liquid return separation tank, and after the liquid level exceeds a preset height, liquid in the liquid return separation tank is conveyed to a condenser through starting a liquid discharge pump.
Further, an air inlet valve group and a pressure gauge are connected in series in the wire and the pipe; the air inlet valve group consists of two manual valves and an electric valve; an air return hand valve and an air return electric valve bank are connected in series in a guide pipe between the exhaust receiving device and the liquid return separation tank; and a drain pump manual valve is connected in series in a conduit between the liquid return separation tank and the drain pump, and a check valve, a drain electric valve bank and a drain hand valve are connected in series in a conduit between the drain pump and the condenser.
Furthermore, the exhaust system adopts a closed circulating cooling mode and consists of a semi-cylinder, sealing silica gel is arranged at an opening, the height of the sealing silica gel is greater than the distance of the rows of the heat exchange tubes, and the length of the sealing silica gel is required to cover the whole row of the tubes; the exhaust system is connected with the positioning device through a propelling device and is used for collecting gas-liquid mixture from the heat exchange tube; or the exhaust system adopts an open type circulating cooling mode, an exhaust duct is arranged above a rear water chamber in the condenser, and a steam-water separation device is arranged in the exhaust duct and used for collecting gas-liquid mixture from the heat exchange tube.
The invention has the beneficial effects that:
1. the pure physical cleaning method is adopted, so that the corrosion to the condenser tube is avoided, and the chemical pollution is avoided;
2. the method for cleaning the pipeline by adopting compressed air is a commonly used method in industry, and the effect is ensured;
3. each power plant is provided with an air compressor room and a pipeline which is arranged, so that the air source is sufficient and the use is convenient;
4. the chemical cleaning dosing equipment, the investment of large auxiliary equipment such as a high-pressure water pump and the like are reduced, and the cost is reduced;
5. the invention adopts the exhaust system, avoids the trouble caused by the compressed air for cleaning entering the circulating water system, and better solves the overpressure problem of the compressed air in the process of cleaning the heat exchange tube of the condenser; aiming at the working characteristics of the condenser of the wet-cold open type unit, the invention adopts the direct discharge receiving device, thereby reducing the equipment investment;
6. provides a new method and a new way for cleaning the condenser of the power plant on line.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In the drawings:
FIG. 1 is a preferred embodiment of a compressed air online purging system for a heat exchange tube of a power plant condenser.
FIG. 2 is another preferred embodiment of the compressed air online purging system for the heat exchange tubes of the power plant condenser.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in FIGS. 1 and 2, the on-line purging system for compressed air of the heat exchange tube of the condenser in the power plant comprises an air storage tank 1, an inlet air purging device 24, an exhaust system 16 and a return liquid separation tank 7.
The gas storage tank 1 is arranged outside the condenser and used for blowing stored gas to a heat exchange tube in the condenser; the air inlet purging device 24 is arranged at a front water chamber 27 in the condenser, and the air storage tank 1 is communicated and used for inputting the air in the air storage tank 1 into one or more rows of heat exchange tubes of the condenser; the exhaust system 16 is arranged at a rear water chamber 17 in the condenser, is connected with the vertical positioning device through a propelling device and is used for collecting gas in a heat exchange tube of a rear tube plate 18; the liquid return separation tank 7 is arranged outside the condenser, is communicated with the exhaust receiving device 16 and is used for collecting liquid of the exhaust receiving device 16; the liquid return separation tank 7 is connected with the condenser through a liquid discharge pump 10 and is used for conveying the liquid in the liquid return separation tank 7 to the condenser again.
A preferred embodiment of the above embodiment is given below with respect to the intake purge device:
with continued reference to FIG. 1, the inlet purge means 24 comprises a plurality of control valves 22, wherein one heat exchange tube corresponds to each control valve 22; the control valves 22 are electrically connected through a wiring bar 26, the wiring bar 26 is electrically connected with a control cabinet 5 arranged outside the condenser through a cable 4, and the control cabinet 5 controls the on-off of the control valves 22; an air inlet joint 23 is arranged at the inlet of the control valve 22, and the air inlet joints 23 are communicated with the air storage tank 1 through a guide pipe and then communicated with the air storage tank through an air inlet main pipe 25; the outlet of the control valve 22 is provided with a self-sealing nozzle 21 for inserting into the heat exchange tube positioned in the front tube plate 20.
A preferred embodiment of the above embodiment is given below with respect to the exhaust system:
continuing to refer to fig. 1, the exhaust system 16 is in a closed circulation cooling form, and is composed of a semi-cylinder, and the opening is provided with sealing silica gel, the height of the sealing silica gel is larger than the distance of the heat exchange tube rows, and the length of the sealing silica gel is required to cover the whole row of tubes; the exhaust system is connected with the positioning robot and is used for collecting gas-liquid mixture from the heat exchange tube.
Another preferred embodiment of the above embodiment with respect to the exhaust system is given below:
continuing to refer to fig. 2, the exhaust system adopts an open cycle cooling mode, an exhaust duct is arranged above a rear water chamber in the condenser, and a steam-water separation device is arranged in the exhaust duct and used for collecting gas-liquid mixture from the heat exchange tube.
Further scheme: an air inlet control valve group and a pressure gauge 28 are connected in series in the cable 4; the air inlet control valve group consists of two manual valves 2 and an electric valve 3.
Further scheme: and the liquid return separation tank 7 is provided with an exhaust port 8 and a liquid level meter 6. The gas in the liquid return separation tank 7 is discharged to the atmosphere through an exhaust port 8; the liquid level meter 6 is used for checking the liquid level in the liquid return separation tank 7 in real time, and after the liquid level exceeds a preset height, the liquid in the liquid return separation tank 7 is conveyed to the condenser by starting the liquid discharge pump 10.
Further scheme: an air return hand valve 15 and an air return electric valve group 13 are connected in series in a conduit between the exhaust receiving device 16 and the liquid return separation tank 7.
Further, a drain pump manual valve 9 is connected in series to a conduit between the return liquid separation tank 7 and a drain pump 10, and a check valve 11, a drain electric valve block 12, and a drain manual valve 14 are connected in series to a conduit between the drain pump 10 and a condenser.
The invention also discloses an on-line compressed air purging method for the power plant condenser, which comprises the following steps: storing the plant compressed air through an air storage tank; positioning an air inlet purging device positioned at a front water chamber of the condenser to a row of heat exchange tubes through a lifting robot; the control cabinet outside the condenser is used for controlling and conducting the air inlet purging device, so that compressed air in the air storage tank purges the heat exchange pipe; collecting gas and liquid in the heat exchange tube through an exhaust receiving device positioned at the rear water chamber of the condenser; the exhaust receiving device discharges the collected gas and liquid into a liquid return separation tank positioned outside the condenser; the liquid return separation tank conveys the liquid into the condenser again through a liquid discharge pump; after the air inlet purging device finishes purging one row of heat exchange tubes, the air inlet purging device is positioned to the next row of heat exchange tubes through the positioning robot to perform a new purging process.
In conclusion, the invention adopts a pure physical cleaning method, does not corrode the condenser tube and has no chemical pollution; the method for cleaning the pipeline by adopting compressed air is a commonly used method in industry, and the effect is ensured; each power plant is provided with an air compressor room and a pipeline which is arranged, so that the air source is sufficient and the use is convenient; the chemical cleaning dosing equipment, the investment of large auxiliary equipment such as a high-pressure water pump and the like are reduced, and the cost is reduced; the invention adopts the exhaust system, avoids the trouble caused by the compressed air for cleaning entering the circulating water system, and better solves the overpressure problem of the compressed air in the process of cleaning the heat exchange tube of the condenser; aiming at the working characteristics of the condenser of the wet-cold open type unit, the invention adopts the direct discharge receiving device, thereby reducing the equipment investment; provides a new method and a new way for cleaning the condenser of the power plant on line.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than others, combinations of features of different embodiments are also meant to be within the scope of the invention and form different embodiments. For example, in the above embodiments, those skilled in the art can use the combination according to the known technical solutions and technical problems to be solved by the present application.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a power plant's condenser heat exchange tube compressed air blasts system on line which characterized in that includes:
the air storage tank is arranged outside the condenser and used for storing a certain amount of compressed air and ensuring continuous purging of the heat exchange tube in the condenser;
the air inlet purging device is arranged in a front water chamber in the condenser, and the air storage tank is communicated and used for injecting high-pressure air in the air storage tank into a group of heat exchange tubes of the condenser;
the exhaust system is arranged in a rear water chamber in the condenser and is used for collecting gas-liquid mixture from the heat exchange tube;
the liquid return separation tank is arranged outside the condenser, is communicated with the exhaust system, and is used for collecting gas-liquid mixture, performing gas-liquid separation, recovering circulating water and discharging exhaust gas;
and the liquid return separation tank is connected with the condenser through a liquid discharge pump and is used for conveying the liquid in the liquid return separation tank to the condenser again.
2. The on-line purging system for compressed air of the heat exchange tubes of the power plant condensers according to claim 1, characterized in that:
the air inlet purging device comprises a plurality of control valves, wherein one group of heat exchange tubes corresponds to one control valve;
the control valves are electrically connected through a wiring bar, the wiring bar is electrically connected with a control cabinet arranged outside the condenser through a cable, and the control cabinet is used for controlling the on-off of the control valves;
the inlet of the control valve is provided with an air inlet joint, and a plurality of air inlet joints are communicated with an air storage tank through a guide pipe and then communicated with the air storage tank through an air inlet main pipe;
and a self-sealing spray head is installed at the outlet of the control valve and used for purging the heat exchange pipe.
3. The on-line purging system for compressed air of the heat exchange tubes of the power plant condensers according to claim 2, characterized in that:
an air inlet control valve group and a pressure gauge are connected in series in the cable; the air inlet control valve group consists of two manual valves and an electric valve;
an exhaust port and a liquid level meter are arranged on the liquid return separation tank; an air return hand valve and an air return electric valve bank are connected in series in a guide pipe between the exhaust receiving device and the liquid return separation tank;
and a drain pump manual valve is connected in series in a conduit between the liquid return separation tank and the drain pump, and a check valve, a drain electric valve bank and a drain hand valve are connected in series in a conduit between the drain pump and the condenser.
4. The on-line purging system for compressed air of the heat exchange tubes of the power plant condensers according to claim 1, characterized in that:
the exhaust system adopts a closed circulating cooling mode and consists of a semi-cylinder, sealing silica gel is arranged at an opening, the height of the sealing silica gel is greater than the distance of a heat exchange tube row, and the length of the sealing silica gel is required to cover the whole row of tubes;
the exhaust system is connected with the positioning robot and is used for collecting gas-liquid mixture from the heat exchange tube.
5. The on-line purging system for compressed air of the heat exchange tubes of the power plant condensers according to claim 1, characterized in that:
the exhaust system adopts an open type circulating cooling mode, an exhaust duct is arranged above a rear water chamber in the condenser, and a steam-water separation device is arranged in the exhaust duct and used for collecting gas-liquid mixture from the heat exchange tube.
6. An online purging method for compressed air of a heat exchange tube of a condenser of a power plant is characterized by comprising the following steps:
storing the plant compressed air through an air storage tank;
positioning an air inlet purging device positioned at a front water chamber of the condenser to a row of heat exchange tubes by a positioning robot;
the control cabinet outside the condenser is used for controlling and conducting the air inlet purging device, so that compressed air in the air storage tank purges the heat exchange pipe;
collecting gas and liquid in the heat exchange tube through an exhaust system positioned at a rear water chamber of the condenser;
the exhaust system discharges the collected gas and liquid into a liquid return separation tank positioned outside the condenser;
the liquid return separation tank conveys the liquid into the condenser again through a liquid discharge pump;
after the air inlet purging device finishes purging one row of heat exchange tubes, the air inlet purging device is positioned to the next row of heat exchange tubes through the positioning robot to perform a new purging process.
7. The on-line purging method for the compressed air of the heat exchange tube of the power plant condenser as recited in claim 6 is characterized in that:
the air inlet purging device comprises a plurality of control valves, wherein one group of heat exchange tubes corresponds to one control valve;
the control valves are electrically connected through a wiring bar, the wiring bar is electrically connected with a control cabinet arranged outside the condenser through a cable, and the control cabinet is used for controlling the on-off of the control valves;
the inlet of the control valve is provided with an air inlet joint, and a plurality of air inlet joints are communicated with an air storage tank through a guide pipe and then communicated with the air storage tank through an air inlet main pipe;
and a self-sealing spray head is installed at the outlet of the control valve and used for purging the heat exchange tube.
8. The on-line purging method for the compressed air of the heat exchange tube of the power plant condenser as recited in claim 6 is characterized in that:
discharging the gas in the liquid-returning separation tank to the atmosphere through an exhaust port arranged on the liquid-returning separation tank; the liquid level in the liquid return separation tank is checked in real time through a liquid level meter arranged on the liquid return separation tank, and after the liquid level exceeds a preset height, liquid in the liquid return separation tank is conveyed to a condenser through starting a liquid discharge pump.
9. The on-line purging method for the compressed air of the heat exchange tube of the power plant condenser as recited in claim 6 is characterized in that:
an air inlet valve group and a pressure gauge are connected in series in the wire and the pipe; the air inlet valve group consists of two manual valves and an electric valve;
an air return hand valve and an air return electric valve bank are connected in series in a guide pipe between the exhaust receiving device and the liquid return separation tank;
and a drain pump manual valve is connected in series in a conduit between the liquid return separation tank and the drain pump, and a check valve, a drain electric valve bank and a drain hand valve are connected in series in a conduit between the drain pump and the condenser.
10. The on-line purging method for the compressed air of the heat exchange tube of the power plant condenser as recited in claim 6 is characterized in that:
the exhaust system adopts a closed circulating cooling mode and consists of a semi-cylinder, sealing silica gel is arranged at an opening, the height of the sealing silica gel is greater than the distance of a heat exchange tube row, and the length of the sealing silica gel is required to cover the whole row of tubes;
the exhaust system is connected with the positioning device through a propelling device and is used for collecting gas-liquid mixture from the heat exchange tube;
or the exhaust system adopts an open type circulating cooling mode, an exhaust duct is arranged above a rear water chamber in the condenser, and a steam-water separation device is arranged in the exhaust duct and used for collecting gas-liquid mixture from the heat exchange tube.
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| CN202010777178.2A CN111879169A (en) | 2020-08-05 | 2020-08-05 | Online air compression purging method and online air compression purging system for power plant condenser |
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| CN202010777178.2A CN111879169A (en) | 2020-08-05 | 2020-08-05 | Online air compression purging method and online air compression purging system for power plant condenser |
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| CN111151512A (en) * | 2020-02-18 | 2020-05-15 | 长江南京航道工程局 | Purging device and automatic filter cleaning equipment with purging device |
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2020
- 2020-08-05 CN CN202010777178.2A patent/CN111879169A/en active Pending
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|---|---|---|---|---|
| GB841951A (en) * | 1957-02-11 | 1960-07-20 | Xflo Heat Exchangers Ltd | Improvements in or relating to heat-exchangers |
| CN207991360U (en) * | 2018-03-22 | 2018-10-19 | 广东千里环保科技有限公司 | Condenser on-line auto-cleaning system |
| CN109307447A (en) * | 2018-09-14 | 2019-02-05 | 江苏常丰节能科技有限公司 | A kind of climbing robot climbs wall method and condenser cleaning equipment |
| CN109237991A (en) * | 2018-09-17 | 2019-01-18 | 中国矿业大学 | A kind of circulating plant condenser in-site chemical cleaning method and system |
| CN111151512A (en) * | 2020-02-18 | 2020-05-15 | 长江南京航道工程局 | Purging device and automatic filter cleaning equipment with purging device |
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