CN217004438U - Power plant external supply steam condensate return water waste heat recovery system - Google Patents
Power plant external supply steam condensate return water waste heat recovery system Download PDFInfo
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- CN217004438U CN217004438U CN202120280268.0U CN202120280268U CN217004438U CN 217004438 U CN217004438 U CN 217004438U CN 202120280268 U CN202120280268 U CN 202120280268U CN 217004438 U CN217004438 U CN 217004438U
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Abstract
The utility model provides a power plant supplies outside steam condensate return water waste heat recovery system, includes: the system comprises a raw water heater, a boiler make-up water treatment system and an external steam supply condensed water backwater treatment system; the raw water heater comprises an external steam supply condensed water inlet, an external steam supply condensed water outlet, a boiler make-up water inlet and a boiler make-up water outlet; the external steam supply condensed water inlet is connected with an external steam supply condensed water return pipe, the external steam supply condensed water outlet is connected with an external steam supply condensed water return processing system through an external steam supply condensed water feed pipe, the boiler make-up water inlet is connected with a boiler make-up water feed pipe, and the boiler make-up water outlet is connected with the boiler make-up water processing system through a boiler make-up water feed pipe. The utility model realizes the requirements of raw water heating and chilled water preparation by using the waste heat of the externally supplied steam condensate, fully recycles the waste heat of the externally supplied steam condensate, reduces energy consumption and ensures the safe and efficient operation of equipment.
Description
Technical Field
The utility model belongs to the field of backwater utilization, and particularly relates to a backwater waste heat recovery system and a backwater waste heat recovery method for externally supplied steam condensate of a power plant.
Background
At present, the national attention on energy-saving work is higher and higher, a distributed multi-connected cooling, heating and power energy supply station has wide application prospect and significance, and a centralized refrigeration/heating system is more and more commonly applied to a thermal power plant. A steam type/hot water type lithium bromide absorption type water chilling unit with more concentrated refrigeration applications utilizes steam or hot water to drive a lithium bromide refrigerator to produce air conditioner chilled water with the temperature of 5-7 ℃.
The boiler make-up water treatment system of the thermal power plant generally adopts a full-membrane method-ultrafiltration + reverse osmosis + electric desalting process, and the water temperature can be as low as 0-5 ℃ in winter and spring. The lower water temperature can reduce the filter holes of ultrafiltration and reverse osmosis membranes, reduce the membrane flux, increase the discharge amount of wastewater, cause the pressure rise of equipment and influence the service life of the equipment, so the influence of low-temperature operation must be considered during the system design. In engineering practice, the water inlet temperature of the ultrafiltration device is generally controlled to be 10-40 ℃, and the water inlet temperature of the reverse osmosis device is generally controlled to be 20-25 ℃. Therefore, when the air temperature is low, the incoming water of the boiler makeup water treatment system must be heated, and the raw water is generally heated by steam or electric heating.
The return water temperature of the condensed water of the externally supplied steam of the power plant is higher, generally at 70-95 ℃, the water quality is better, but the condensed water cannot directly return to a thermodynamic system, and the condensed water needs to be comprehensively recycled after water quality treatment. When the water temperature exceeds the tolerance temperature of the treatment facility or the water temperature acceptable by a recycling system, a temperature reduction measure is required. Particularly, when the condensate backwater treatment process adopts an ion exchange method, the backwater temperature cannot exceed the tolerance value of the anion-cation resin. The temperature of the production backwater is generally controlled to be lower than 60 ℃. This requires cooling measures to be taken when the return water temperature exceeds the standard.
Therefore, the water temperature problem of the heat source of the lithium bromide absorption water chilling unit, the raw water heating of the boiler make-up water treatment system and the water temperature problem of the external steam supply condensed water return system is a necessary measure for realizing energy conservation and consumption reduction in the operation of the power plant.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved by the utility model is to provide a power plant external steam supply condensed water return waste heat recovery system which solves the water temperature problems of a heat source of a lithium bromide absorption water chilling unit, a boiler make-up water treatment system raw water heating system and an external steam supply condensed water return system.
The technical means adopted by the utility model are as follows.
The utility model provides a power plant supplies outside steam condensate return water waste heat recovery system, includes at least: the system comprises a raw water heater, a boiler make-up water treatment system and an external steam supply condensed water backwater treatment system; the raw water heater comprises an external steam supply condensed water inlet, an external steam supply condensed water outlet, a boiler make-up water inlet and a boiler make-up water outlet; the external steam supply condensed water inlet is connected with an external steam supply condensed water return pipe, the external steam supply condensed water outlet is connected with an external steam supply condensed water return water treatment system through an external steam supply condensed water feed pipe, the boiler makeup water inlet is connected with a boiler makeup water feed pipe, and the boiler makeup water outlet is connected with the boiler makeup water treatment system through a boiler makeup water feed pipe.
The lithium bromide absorption type water chilling unit comprises a high-temperature return water inlet and a low-temperature return water outlet; the high-temperature backwater water inlet is connected with an external steam supply condensed water backwater pipe, and the low-temperature backwater water outlet is connected with an external steam supply condensed water backwater treatment system through an external steam supply condensed water delivery pipe; the lithium bromide absorption type water chilling unit is connected with the raw water heater in parallel.
Furthermore, the external steam condensed water return pipe is provided with a heater water inlet valve and a water chilling unit water inlet valve; the external steam supply condensed water delivery pipe is provided with a heater water outlet valve and a water outlet valve of a water chilling unit.
Furthermore, the raw water heater is a shell-and-tube heat exchanger or a plate heat exchanger.
The technical effects produced by the present invention are as follows.
1. When the temperature is low, the return water of the externally supplied steam condensate is used as the heat source of the raw water heater, and the raw water of the boiler feedwater treatment system is heated while the return water of the externally supplied steam condensate is cooled.
2. When the temperature is high, the externally supplied steam condensate backwater is used as a heat source of the lithium bromide absorption type water chilling unit, and the chilled water of the air conditioning system is prepared while the externally supplied steam condensate backwater is cooled.
3. When the temperature is low, the return water of the externally supplied steam condensate water with relatively high temperature is utilized to heat the raw water, so that the raw water heater is prevented from consuming electric energy or steam, and the energy is saved.
4. When the temperature is high, the externally supplied steam condensate water with relatively high temperature is used as the heat source of the lithium bromide absorption type water chilling unit, so that the lithium bromide absorption type water chilling unit is prevented from consuming hot water or steam, and the energy is saved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Description of the figure numbers: the system comprises a raw water heater 1, a lithium bromide absorption water chilling unit 2, a boiler make-up water treatment system 3, an external steam supply condensed water backwater treatment system 4, a boiler make-up water inlet pipe 5, a boiler make-up water and water supply pipe 6, an external steam supply condensed water backwater pipe 7, an external steam supply condensed water and water supply pipe 8, an external steam supply condensed water inlet 11, an external steam supply condensed water outlet 12, a boiler make-up water inlet 13, a boiler make-up water outlet 14, a high-temperature backwater water inlet 21, a low-temperature backwater water outlet 22, a heater water inlet valve 110, a water chilling unit water inlet valve 210, a heater water outlet valve 120 and a water chilling unit water outlet valve 220.
Detailed Description
As shown in figure 1, the utility model relates to a power plant external steam supply condensed water backwater waste heat recovery system, which comprises a raw water heater 1, a lithium bromide absorption water chilling unit 2, a boiler make-up water treatment system 3 and an external steam supply condensed water backwater treatment system 4.
The raw water heater 1 is a shell-and-tube heat exchanger or a plate heat exchanger. The raw water heater 1 comprises an external steam supply condensed water inlet 11, an external steam supply condensed water outlet 12, a boiler make-up water inlet 13 and a boiler make-up water outlet 14; the external steam supply condensed water inlet 11 is connected with an external steam supply condensed water return pipe 7, the external steam supply condensed water outlet 12 is connected with an external steam supply condensed water return processing system 4 through an external steam supply condensed water feed pipe 8, the boiler makeup water inlet 13 is connected with a boiler makeup water feed pipe 5, and the boiler makeup water outlet 14 is connected with a boiler makeup water processing system 3 through a boiler makeup water feed pipe 6.
The lithium bromide absorption type water chilling unit 2 comprises a high-temperature return water inlet 21 and a low-temperature return water outlet 22; the high-temperature backwater water inlet 21 is connected with an external steam condensate water return pipe 7, and the low-temperature backwater water outlet 22 is connected with an external steam condensate water return processing system 4 through an external steam condensate water supply pipe 8; the lithium bromide absorption type water chilling unit 2 is connected with the raw water heater 1 in parallel.
The external steam supply condensed water return pipe 7 is provided with a heater water inlet valve 110 and a water chilling unit water inlet valve 210; the water supply pipe 8 for the condensed water of the external steam supply is provided with a water outlet valve 120 of the heater and a water outlet valve 220 of the water chilling unit.
The boiler make-up water treatment system 3 mainly comprises an ultrafiltration device, a reverse osmosis device, an electrodeionization device or an ion exchanger. The external steam supply condensed water backwater treatment system 4 mainly comprises an iron removal filter and an ion exchanger, and the inside of the system is filled with cation resin or mixed resin of the cation resin and anion resin.
When the temperature is low, the heater water inlet valve 110 and the heater water outlet valve 120 are opened, the water cooling unit water inlet valve 210 and the water cooling unit water outlet valve 220 are closed, the high-temperature externally-supplied steam condensate backwater exchanges heat with the raw water heater 1, the raw water is heated to 25 ℃ by the raw water heater 1 and then enters the boiler feedwater treatment system 3 for treatment, and the externally-supplied steam condensate backwater enters the externally-supplied steam condensate backwater treatment system after being cooled to below 60 ℃.
When the temperature is high, the water inlet valve 210 of the water chilling unit and the water outlet valve 220 of the water chilling unit are opened, the water inlet valve 110 of the heater and the water outlet valve 120 of the heater are closed, the high-temperature externally supplied steam condensate backwater enters the lithium bromide absorption water chilling unit 2, the externally supplied steam condensate backwater is used as a heat source of the lithium bromide absorption water chilling unit 2, and the externally supplied steam condensate backwater enters the externally supplied steam condensate backwater treatment system 4 for treatment after being cooled to below 60 ℃.
Claims (4)
1. The utility model provides a power plant supplies steam condensate return water waste heat recovery system outward which characterized in that includes at least: a raw water heater (1), a boiler make-up water treatment system (3) and an external steam supply condensed water backwater treatment system (4); the raw water heater (1) comprises an external steam supply condensed water inlet (11), an external steam supply condensed water outlet (12), a boiler make-up water inlet (13) and a boiler make-up water outlet (14); the external steam supply condensed water inlet (11) is connected with an external steam supply condensed water return pipe (7), the external steam supply condensed water outlet (12) is connected with an external steam supply condensed water return processing system (4) through an external steam supply condensed water feed pipe (8), the boiler make-up water inlet (13) is connected with a boiler make-up water feed water pipe (5), and the boiler make-up water outlet (14) is connected with the boiler make-up water processing system (3) through a boiler make-up water feed water pipe (6).
2. The system for recovering the waste heat of the returned condensed water of the steam supply outside the power plant according to claim 1, further comprising a lithium bromide absorption chiller (2), wherein the lithium bromide absorption chiller (2) comprises a high-temperature returned water inlet (21) and a low-temperature returned water outlet (22); the high-temperature backwater water inlet (21) is connected with an external steam supply condensed water backwater pipe (7), and the low-temperature backwater water outlet (22) is connected with an external steam supply condensed water backwater treatment system (4) through an external steam supply condensed water supply pipe (8); the lithium bromide absorption type water chilling unit (2) is connected with the raw water heater (1) in parallel.
3. The power plant external steam condensate return waste heat recovery system according to claim 2, wherein the external steam condensate return pipe (7) is provided with a heater inlet valve (110) and a chiller inlet valve (210); the water supply pipe (8) for the condensed water of the external steam supply is provided with a water outlet valve (120) of the heater and a water outlet valve (220) of the water chilling unit.
4. The system for recovering the waste heat of the condensed water returned from the steam supply outside the power plant according to claim 1, wherein the raw water heater (1) is a shell-and-tube heat exchanger or a plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120280268.0U CN217004438U (en) | 2021-02-01 | 2021-02-01 | Power plant external supply steam condensate return water waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120280268.0U CN217004438U (en) | 2021-02-01 | 2021-02-01 | Power plant external supply steam condensate return water waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217004438U true CN217004438U (en) | 2022-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120280268.0U Active CN217004438U (en) | 2021-02-01 | 2021-02-01 | Power plant external supply steam condensate return water waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217004438U (en) |
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2021
- 2021-02-01 CN CN202120280268.0U patent/CN217004438U/en active Active
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