CN210717486U - Boiler body high-temperature waste water waste heat on-line recycling system - Google Patents
Boiler body high-temperature waste water waste heat on-line recycling system Download PDFInfo
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- CN210717486U CN210717486U CN201921138826.9U CN201921138826U CN210717486U CN 210717486 U CN210717486 U CN 210717486U CN 201921138826 U CN201921138826 U CN 201921138826U CN 210717486 U CN210717486 U CN 210717486U
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Abstract
The utility model discloses an online recycling system for high-temperature waste water and waste heat of a boiler body, which is an online recycling system for high-temperature waste water and waste heat of a natural circulation boiler body of a power station, and realizes the waste water and waste heat utilization function by additionally installing interlocking logics of an electric valve, a pipeline and a manual valve in a DCS control system; the system has a simple structure, realizes the purpose of on-line recycling of the waste heat of the high-temperature waste water of the boiler body by utilizing digital signal logic of a DCS centralized control system, interlocking of an electric mechanism, a water gravity flow principle and the like, and solves the 'white dragon' phenomenon of high-altitude exhaust gas in winter in the north.
Description
Technical Field
The utility model relates to an online utilization system of boiler body high temperature waste water waste heat belongs to power plant boiler technical field.
Background
At present, high-temperature water drainage, water drainage and sewage discharge water of a natural circulation boiler body of a power station are discharged in two ways after passing through a flash tank, one way of high-temperature water forms steam and is directly discharged into the atmosphere through a pipeline, one way of high-temperature water forms a steam-water mixture in the flash tank and is discharged into a water collecting well for discharge treatment, and heat is not utilized. At present, a large number of coal-fired power stations are designed in the mode, a large amount of heat is discharged every year, a large amount of high-temperature steam is directly discharged into the high altitude, energy waste is caused, meanwhile, the environmental protection problem is formed, in cold areas in the north in winter, due to the fact that the heat discharged into the high altitude is scattered along with wind, condensed water drops are hung at high-altitude factory buildings and the like, a large amount of ice is frozen, the ice melts in spring and falls off to damage the factory building, and safety threat is formed.
SUMMERY OF THE UTILITY MODEL
In order to avoid among the prior art long-term a large amount of heats extravagant, solve simultaneously in the north because the high altitude building freezes the safety risk that produces the power plant building in winter, improve energy utilization and solve the high altitude a large amount of accumulated ice and drop the potential safety hazard that brings, the utility model provides a boiler body high temperature waste water waste heat utilizes system on line, this system simple structure has utilized interlocking logic signal in the DCS control system, electric mechanism interlocking, the dilatation principle of flowing automatically of water, develops on the basis of former row of deciding ware, has not only solved the retrieval and utilization problem of high temperature waste water heat recycle and water, has eliminated the high altitude exhaust steam of power plant in the north simultaneously and has frozen the potential safety hazard of falling injury people's destroyer winter.
The utility model aims at realizing the system, which comprises a fixed-row flash tank, a steam pocket, an ash bucket device, a first outdoor water collecting well, an indoor water collecting well and a second outdoor water collecting well, wherein the fixed-row flash tank is connected with the steam pocket, a bypass pipeline is arranged on the fixed-row flash tank, one end of the bypass pipeline is connected with the fixed-row flash tank, the other end of the bypass pipeline is connected with a first electric door, the other end of the first electric door is connected with a direct-exhaust atmosphere pipeline, the direct-exhaust atmosphere pipeline is provided with a second electric door, a waste heat utilization main pipeline is connected between the second electric door and the fixed-row flash tank on the direct-exhaust atmosphere pipeline, the waste heat utilization main pipeline is provided with a third electric door, the fixed-row flash tank is connected with the second outdoor water collecting well through the first pipeline, the second outdoor water collecting well is connected with the indoor water collecting well through the second pipeline, indoor sump pit passes through the first outdoor sump pit of third tube coupling, be connected with the female pipe of waste heat utilization return water on the first outdoor sump pit, four ash bucket devices of parallel connection between the female pipe of waste heat utilization main line and waste heat utilization return water, the ash bucket device comprises steam supply hand door, ash bucket heater, ash bucket main part and return water hand door, wherein steam supply hand door one end is connected from the waste heat utilization main line, and the ash bucket heater is connected to the other end, the ash bucket heater is installed in electrostatic precipitator ash bucket main part outer wall keeps warm, the female pipe of waste heat utilization return water is connected to ash bucket heater, the other end to return water hand door one end.
The utility model has the advantages and the technical effect be:
1. the utility model discloses boiler body high temperature waste water waste heat on-line utilization system mainly is through installing pipeline, valve additional at the flash tank, realizes through DCS control system.
2. The utility model has the advantages of simple structure, utilized DCS control system digital signal logic, the principle of flowing automatically of electric mechanism interlocking, water. The interlocking of the electric mechanism ensures the safety and reliability of the original system by depending on the logic of the thermal control signal.
3. ① through the transmission of synchronous digital signal, the former system mode of recovery when having guaranteed the action of the boiler accident water discharge electrically operated gate, the safe and reliable of flash tank has been guaranteed ② has newly increased the electrically operated gate in the atmosphere pipeline of direct vent and has installed the bypass, safety guarantee measures has been increased ③ get the water level value signal at the boiler drum, the security of system has been improved ④ realizes signal logic control through DCS ⑤ ash bucket steam heater branch loop control, increased steam utilization reliability ⑥ has replaced the former electric heater of ash bucket, the energy has been practiced thrift ⑦ has eliminated the power plant in winter about 50 meters high altitude "white dragon" phenomenon, be favorable to the environmental protection.
Drawings
Fig. 1 is a schematic plan view of the overall structure of the present invention.
Fig. 2 is a control logic diagram of the present invention.
Reference numerals: the system comprises a fixed-discharge flash tank 1, a steam pocket 2, an ash bucket device 3, a first outdoor water collecting well 4, an indoor water collecting well 5, a second outdoor water collecting well 6, a first electric door 7, a second electric door 8, a waste heat utilization main pipeline 9, a third electric door 10, a first pipeline 11, a second pipeline 12, a third pipeline 13, a waste heat utilization water return main pipe 14, a direct-discharge atmosphere pipeline 15, an accident water discharge electric door 16 and a bypass pipeline 17; the device comprises a steam supply manual door 3-1, an ash bucket heater 3-2, an ash bucket main body 3-3 and a water return manual door 3-4.
Detailed Description
The following detailed description of the embodiments of the present invention refers to the accompanying drawings.
Shown in figure 1: the system comprises a fixed-row flash tank 1, a steam pocket 2, an ash bucket device 3, a first outdoor water collecting well 4, an indoor water collecting well 5 and a second outdoor water collecting well 6, wherein the fixed-row flash tank is connected with the steam pocket 2, a bypass pipeline 17 is arranged on the fixed-row flash tank 1, one end of the bypass pipeline 17 is connected to the fixed-row flash tank 1, the other end of the bypass pipeline 17 is connected with a first electric door 7, the other end of the first electric door 7 is connected with a direct-exhaust atmosphere pipeline 15, a second electric door 8 is arranged on the direct-exhaust atmosphere pipeline 15, two ends of the bypass pipeline 17 are respectively connected to the fixed-row flash tank 1, a waste heat utilization main pipeline 9 is connected between the second electric door 8 and the fixed-row flash tank 1 on the direct-exhaust atmosphere pipeline 15, a third electric door 10 is arranged on the waste heat utilization main pipeline 9, the fixed-row flash tank 1 is connected with the second outdoor water collecting well 6 through a first pipeline 11, the second outdoor water collecting well 6 is connected with the indoor water collecting well 5 through a second pipeline 12, the indoor water collecting well 5 is connected with the first outdoor water collecting well 4 through a third pipeline 13, a waste heat utilization backwater main pipe 14 is connected onto the first outdoor water collecting well 4, four ash bucket devices 3 are connected in parallel between a waste heat utilization main pipeline 9 and the waste heat utilization backwater main pipe 14, each ash bucket device 3 comprises a steam supply manual door 3-1, an ash bucket heater 3-2, an ash bucket main body 3-3 and a backwater manual door 3-4, one end of the steam supply manual door 3-1 is connected with the waste heat utilization main pipeline 9, the other end of the steam supply manual door is connected with the ash bucket heater 3-2, the ash bucket heater 3-2 is installed in the heat preservation of the outer wall of the ash bucket main body 3-3 of the electric dust remover, one end of the backwater manual door 3-4 is connected with the ash bucket heater 3-2, The other end is connected with a waste heat utilization water return main pipe 14.
The first electric door 7 is a bypass pipeline electric door of an atmospheric air exhaust electric door;
the second electric door 8 is a fixed-row flash tank direct-exhaust atmosphere electric door;
the third electric door 10 is an electric door for online recycling of the waste heat of the high-temperature wastewater of the boiler body;
the steam supply manual door 3-1 is a steam supply manual door of an ash bucket heater;
the backwater manual door 3-4 is a backwater manual door of an ash bucket heater;
and the second electric door 8 is arranged on the straight-line atmospheric pipeline, and the distance between the position and the flash tank is not less than 2 m.
The working principle is as follows: the boiler body waste water waste heat on-line recycling process comprises the following steps: boiler body waste water → fixed-discharge flash tank 1 → boiler body high-temperature waste water waste heat online recycling pipeline (waste heat utilization main pipeline 9) → ash bucket heater 3-2 → waste heat utilization return water main pipe 14 → first outdoor water collecting well 4.
The utility model discloses boiler body high temperature waste water waste heat on-line recycle system is to improve former boiler fixed row flash tank, passes through the utility model to recycle this part of heat of former straight exhaust atmosphere, reaches energy-conserving, environmental protection, safe purpose; the boiler body wastewater mainly comprises boiler steam drum continuous blowdown, periodic blowdown, partial drainage, accident water drainage and the like, wherein part of high-temperature and high-pressure water forms a steam-water mixture and is discharged to an indoor water collecting well, part of high-temperature steam is directly discharged to the atmosphere,
the utility model relates to an automatic waste heat recycling system, which recycles the heat of the exhaust air; all automatic control is realized by the DCS system. When the water level of the boiler is normal, when the accident water discharge electric door 16 of the steam pocket 2 is in a closed state, the waste heat of high-temperature waste water of the boiler body is in an online recycling state, the second electric door 8 directly discharging to the atmosphere and the bypass first electric door 7 are closed simultaneously, the waste heat is in an open state by online recycling of the third electric door 10, meanwhile, the air inlet valve (the steam supply manual door 3-1) and the water return valve (the water return manual door 3-4) of the ash bucket heater are in an open state, and steam condensed into water through the ash bucket heater 3-2 flows into the first outdoor water collecting well 4 through the waste heat recycling water return main pipe 14 to be recycled; when the water level of the boiler is abnormally raised and the emergency water discharge electric door 16 of the boiler steam drum 2 acts, a DCS internal action signal is fed back to the second electric door 8 of the fixed-row flash tank self-exhaust atmosphere to achieve synchronous linkage opening, so that the fixed-row flash tank 1 is ensured not to be over-pressurized, and the first electric door 7 is quickly opened when the second electric door 8 of the fixed-row flash tank receives an opening signal but does not act actually, so that the fixed-row flash tank 1 is ensured not to be over-pressurized; when the second electric door 8 receives the opening signal, the action signal in the DCS is fed back to the electric door (the third electric door 10) for online recycling of the high-temperature waste water waste heat of the boiler body, synchronous automatic closing is realized, and the ash bucket heating system is guaranteed not to be over-pressurized; in order to ensure the system safety, 95% of the action value of the accident water discharge electric door 16 (the signal value is the action value transmitted by the water level of the boiler drum 2 to the accident water discharge electric door 16, and the accident water discharge electric door 16 is automatically opened when the water level of the drum 2 reaches the action value) is taken as the opening instruction action value of the direct-discharge atmosphere electric door 8 of the fixed-discharge flash tank 1, and 95% of the pressure-bearing design value of the fixed-discharge flash tank 1 is taken as the opening instruction value of the direct-discharge atmosphere electric door 8. The number of the motion signals transmitted to the direct-exhaust atmosphere electric door 8 is three, which is enough to ensure that the flash tank 1 is controlled not to generate overpressure. When the direct-exhaust atmosphere electric door 8 of the fixed-row flash tank 1 does not receive a high water level signal value of the steam pocket 2, an action signal of the accident water-exhaust electric door 16 and a pressure-bearing value signal of the fixed-row flash tank 1, the fixed-row flash tank 1 is in a closed state, and meanwhile, the boiler body waste water waste heat online recycling electric door 10 is opened for waste heat recycling.
Shown in figure 2: the logic relation of the utility model is as follows, the direct vent atmosphere electric door 8 receives 95% signal of 16 action values of the accident water discharge electric door at the same time; an opening action signal of the accident water discharging electric door 16; designing a pressure value signal for the flash tank; the three logic relations are OR. The direct vent atmosphere electrically operated gate 8 receives any one of the three signals, and executes the opening action, when the electrically operated gate 8 fails to open, the failure signal is fed back to the bypass electrically operated gate 7 to execute the opening action, so that the system safety is ensured. When the direct vent atmosphere electric door 8 receives the opening action feedback signal, a closing signal is transmitted to the waste heat utilization electric door 10; the closing of the power door 10 ensures that the hopper heating system is not over-pressurized.
The waste heat on-line utilization is to lead high-temperature steam with the temperature of about 170 ℃ and the pressure of about 0.68MP in the flash tank 1 to the dust remover through a pipeline 9 to heat the ash bucket 3-3 to replace an ash bucket electric heater, thereby saving the part of electric energy.
The water self-flowing principle is that steam heated by an ash bucket is condensed into water, the water automatically flows back to the water collecting well 4 through a height difference of about 4 meters, and the water is periodically sent to a water tower by a pump to be used as circulating water.
Claims (1)
1. The utility model provides an online recycle system of boiler body high temperature waste water waste heat which characterized in that: the system comprises a fixed-row flash tank (1), a steam pocket (2), an ash bucket device (3), a first outdoor water collecting well (4), an indoor water collecting well (5) and a second outdoor water collecting well (6), wherein the fixed-row flash tank is connected with the steam pocket (2), a bypass pipeline (17) is arranged on the fixed-row flash tank (1), one end of the bypass pipeline (17) is connected to the fixed-row flash tank (1), the other end of the bypass pipeline is connected with a first electric door (7), the other end of the first electric door (7) is connected with a direct-exhaust atmosphere pipeline (15), a second electric door (8) is arranged on the direct-exhaust atmosphere pipeline (15), a waste heat utilization main pipeline (9) is connected between the second electric door (8) and the fixed-row flash tank (1) on the direct-exhaust atmosphere pipeline (15), and a third electric door (10) is arranged on the waste heat utilization main pipeline (9), the fixed-row flash tank (1) is connected with a second outdoor water collecting well (6) through a first pipeline (11), the second outdoor water collecting well (6) is connected with an indoor water collecting well (5) through a second pipeline (12), the indoor water collecting well (5) is connected with a first outdoor water collecting well (4) through a third pipeline (13), a waste heat utilization return water main pipe (14) is connected onto the first outdoor water collecting well (4), four ash bucket devices (3) are connected in parallel between the waste heat utilization main pipe (9) and the waste heat utilization return water main pipe (14), each ash bucket device (3) is composed of a steam supply manual door (3-1), an ash bucket heater (3-2), an ash bucket main body (3-3) and a return water manual door (3-4), wherein one end of the steam supply manual door (3-1) is connected with the slave waste heat utilization main pipe (9), the other end of the ash bucket is connected with an ash bucket heater (3-2), the ash bucket heater (3-2) is installed in the outer wall heat preservation of the ash bucket main body (3-3) of the electric dust collector, one end of the backwater manual door (3-4) is connected with the ash bucket heater (3-2), and the other end of the backwater manual door is connected with a waste heat utilization backwater main pipe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138826.9U CN210717486U (en) | 2019-07-19 | 2019-07-19 | Boiler body high-temperature waste water waste heat on-line recycling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138826.9U CN210717486U (en) | 2019-07-19 | 2019-07-19 | Boiler body high-temperature waste water waste heat on-line recycling system |
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| CN210717486U true CN210717486U (en) | 2020-06-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260294A (en) * | 2019-07-19 | 2019-09-20 | 辛亮 | Boiler body hot waste water waste heat online recycling utilizes system |
| RU2799897C1 (en) * | 2022-12-26 | 2023-07-13 | Общество с ограниченной ответственностью "Газпром добыча Уренгой" | Device for thermal neutralization of industrial waste water |
-
2019
- 2019-07-19 CN CN201921138826.9U patent/CN210717486U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110260294A (en) * | 2019-07-19 | 2019-09-20 | 辛亮 | Boiler body hot waste water waste heat online recycling utilizes system |
| CN110260294B (en) * | 2019-07-19 | 2024-06-11 | 吉林电力股份有限公司四平第一热电公司 | Online recycling system for waste heat of high-temperature waste water of boiler body |
| RU2799897C1 (en) * | 2022-12-26 | 2023-07-13 | Общество с ограниченной ответственностью "Газпром добыча Уренгой" | Device for thermal neutralization of industrial waste water |
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