阅读说明：本技术 一种直流冷却水火电机组的循环水泵冷却水节水工艺 (A kind of water circulating pump cooling water water saving art of once-through cooling water fired power generating unit ) 是由 唐国瑞 衡世权 王丰吉 李晶 晋银佳 王仁雷 喻江 于 2019-07-10 设计创作，主要内容包括：本发明公开了一种直流冷却水火电机组的循环水泵冷却水节水工艺,将循环水泵的循环水作为自身的冷却水使用,达到减少工业水用量、节约用水的目的；从循环水泵的循环水出口引一路循环水,通过两级自清洗过滤器将循环水处理合格后作为循环水泵的冷却水使用,冷却水换热后直接随循环水外排,自清洗过滤器的反洗排水直接排至循环水排水沟或前池。本发明适用于直流冷却水火电机组,除循环水泵启停时段外,可以不采用工业水作为循环水泵冷却水,减少循环水泵工业冷却水用量99%以上,大大降低了单位发电取水量。本发明并未切断工业冷却水水源,当自清洗过滤器故障或产水不合格时,可以实现自动切换回工业冷却水功能,以保证循环水泵的安全稳定运行。(The invention discloses a kind of water circulating pump cooling water water saving arts of once-through cooling water fired power generating unit, use the recirculated water of water circulating pump as the cooling water of itself, achieve the purpose that reduce industrial water consumption, water conservation；Draw recirculated water all the way from the circulating water outlet of water circulating pump, cooling water of the circulating water treatment after qualified as water circulating pump is used by two-stage self-cleaning filter, directly with recirculated water outlet after cooling water heat exchange, the backwash draining of self-cleaning filter is immediately discharged to circulation water gutter or forebay.The present invention is suitable for once-through cooling water fired power generating unit, in addition to the water circulating pump start and stop period, industry water can not be used as water circulating pump cooling water, reduce 99% or more water circulating pump industry cooling water consumption, greatly reduces unit power generation water withdrawal.The present invention does not cut off industrial colling water source, when self-cleaning filter failure or unqualified production water, may be implemented to automatically switch back into industrial colling function, to guarantee the safe and stable operation of water circulating pump.)

1. a kind of water circulating pump cooling water water saving art of once-through cooling water fired power generating unit, characterized in that by water circulating pump (7) Recirculated water is used as the cooling water of itself, achievees the purpose that reduce industrial water consumption, water conservation；Technique is as follows: from circulation The circulating water outlet of water pump (7) draws recirculated water all the way, passes through level-one self-cleaning filter (3) and second level self-cleaning filter (4) Cooling water of the circulating water treatment after qualified as water circulating pump (7) is used, cooling water exchange heat after directly with recirculated water outlet, one It is water gutter (9) or preceding that the backwash draining of grade self-cleaning filter (3) and second level self-cleaning filter (4) is immediately discharged to circulation Pond.

2. the water circulating pump cooling water water saving art of once-through cooling water fired power generating unit according to claim 1, characterized in that This technique is suitable for once-through cooling water fired power generating unit, in addition to water circulating pump (7) the start and stop period, industry water can not be used to be used as and followed The cooling water of ring water pump (7) reduces 99% or more water circulating pump (7) industry cooling water consumption, substantially reduces unit power generation water intaking Amount.

3. the water circulating pump cooling water water saving art of once-through cooling water fired power generating unit according to claim 1, characterized in that Industrial colling is used in water circulating pump (7) initial start stage, does not use industrial colling after water pump (7) to be recycled is stable.

4. the water circulating pump cooling water water saving art of once-through cooling water fired power generating unit according to claim 1, characterized in that The cooling water inlet of the water circulating pump (7) carrys out waterpipe (10) with industry and connect, and comes on waterpipe (10) to install in industry There is automatic valve two (5), the cooling water outlet of the water circulating pump (7) is connected to circulation water gutter (9)；The water circulating pump (7) circulating water outlet is connect by No.1 recirculated water conveyance conduit (11) with level-one self-cleaning filter (3), and is followed in No.1 Automatic valve three (6) is installed, the level-one self-cleaning filter (3) is defeated by No. two recirculated waters on ring water conveyance conduit (11) Pipeline (12) is sent to connect with second level self-cleaning filter (4)；The water production pipeline of the second level self-cleaning filter (4) is divided into two Road, water production pipeline is connect with the cooling water inlet of water circulating pump (7) all the way, and is equipped with turbidity in the water production pipeline all the way Table (2) and automatic valve one (1), another way water production pipeline are connect with circulation water gutter (9), and in the another way water producing pipe Automatic valve four (8) is installed on road.

5. the water circulating pump cooling water water saving art of once-through cooling water fired power generating unit according to claim 4, characterized in that The backwash drainage pipeline of the backwash drainage pipeline of the level-one self-cleaning filter (3) and second level self-cleaning filter (4) with Recycle water gutter (9) connection.

6. the water circulating pump cooling water water saving art of once-through cooling water fired power generating unit according to claim 4, characterized in that The turbidimeter (2) is mounted on the production water out of second level self-cleaning filter (4), and the automatic valve one (1) is mounted on circulation The cooling water inlet of water pump (7).

7. the water-saving work of water circulating pump cooling water of once-through cooling water fired power generating unit according to claim 1 to 6 Skill, characterized in that process flow is as follows:

1) in water circulating pump (7) initial start stage, automatic valve two (5) is opened, and automatic valve one (1) and automatic valve three (6) close It closes, the cooling water of water circulating pump (7) uses industry water；

2) after water pump (7) to be recycled is stable, automatic valve three (6) and automatic valve four (8) are opened, level-one self-cleaning filtering Device (3) and second level self-cleaning filter (4) put into operation, by level-one self-cleaning filter (3) and second level self-cleaning filter (4) The initial stage of operation produces water and drains into circulation water gutter (9)；

3) turbidimeter (2) is monitored the producing water water quality of second level self-cleaning filter (4), turbidimeter (2) and automatic valve three (6) and automatic valve four (8) is chain, and to second level self-cleaning filter (4) stable water production, and turbidity meets industry water water quality and wants It after asking, opens automatic valve one (1), closes automatic valve four (8) and automatic valve two (5)；The cooling of water circulating pump (7) at this time Water is all using the recirculated water of processing qualification；

4) cooling water draining, the backwash of level-one self-cleaning filter (3) and second level self-cleaning filter (4) of water circulating pump (7) The unqualified production water of draining, level-one self-cleaning filter (3) and second level self-cleaning filter (4) drains into circulation water gutter (9)；

It 5), need to be by cooling water water source switching because water circulating pump (7) rate of discharge is unstable before water circulating pump (7) prepare termination of pumping Return industry water；Automatic valve two (5) and automatic valve four (8) are opened, automatic valve one (1) and automatic valve three (6) are closed, Complete the step sequence that cooling water switches back into industry water；

6) when the circulating water outlet variation water quality of water circulating pump (7) is larger, the production water turbidity of second level self-cleaning filter (4) does not conform to When lattice, cooling water water source switching need to be returned industry water；Automatic valve two (5) and automatic valve four (8) are opened, automatic valve is closed One (1) of door and automatic valve three (6) complete the step sequence that cooling water switches back into industry water.

Technical field

The present invention relates to a kind of water circulating pump cooling water water saving arts of once-through cooling water fired power generating unit.

Background technique

The fired power generating unit of once-through cooling water is used at present, and because circulating water quality is poor, sediment content is higher, water circulating pump Itself cooling water is all made of industry water, and such as application No. is 201420281317.2 Chinese patents.It, should by taking the power plant of Hubei as an example There are 2 350MW and 2 660MW units in factory, water circulating pump itself cooling water about 96 m per hour³/ h is straight after cooling water heat exchange Run in circulation water gutter, with recirculated water outlet.

The present invention devises a kind of water-saving new process, draws recirculated water all the way from water circulating pump outlet, passes through self-cleaning Filter will use after circulating water treatment qualification as water circulating pump cooling water, and cooling water is directly with recirculated water outlet, self-cleaning The backwash of filter drains direct outlet.

Summary of the invention

It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of reasonable direct current of design The water circulating pump cooling water water saving art of cooling water fired power generating unit, draws recirculated water all the way from water circulating pump outlet, by from clearly Washing filter will use after circulating water treatment qualification as water circulating pump cooling water, to achieve the purpose that save industrial water consumption.

Technical solution used by the present invention solves the above problems is: a kind of water circulating pump of once-through cooling water fired power generating unit Cooling water water saving art, characterized in that used the recirculated water of water circulating pump as the cooling water of itself, reach reduction industry water Dosage, the purpose of water conservation；Technique is as follows: drawing recirculated water all the way from the circulating water outlet of water circulating pump, by level-one from clear It washes filter and second level self-cleaning filter to use cooling water of the circulating water treatment after qualified as water circulating pump, cooling water changes Directly with recirculated water outlet after heat, the backwash draining of level-one self-cleaning filter and second level self-cleaning filter is immediately discharged to recycle Water gutter or forebay.

Further, level-one self-cleaning filter carries out recirculated water for removing biggish particulate matter in recirculated water Primary filtration.Second level self-cleaning filter precision is higher, for further removing suspended matter tiny in recirculated water, makes to be discharged turbid Degree meets industry water water quality requirement, and second level self-cleaning filter produces water and uses to water circulating pump as cooling water.

Further, this technique is suitable for once-through cooling water fired power generating unit can not adopt in addition to the water circulating pump start and stop period It uses industry water as the cooling water of water circulating pump, reduces 99% or more water circulating pump industry cooling water consumption, substantially reduce unit hair Electric water withdrawal.

Further, after the cooling water heat exchange of water circulating pump, directly with recirculated water outlet, do not have to recirculated water draining water quality It influences.

Further, level-one self-cleaning filter and second level self-cleaning filter backwash draining directly with recirculated water outside Row does not influence recirculated water draining water quality.Filter device uses self-cleaning filter, does not stop, not dosing, and operation is simple.

Further, it is not used after water circulating pump initial start stage uses industrial colling, water pump operation to be recycled to stablize Industrial colling.

Further, the cooling water inlet of the water circulating pump carrys out waterpipe with industry and connect, and carrys out waterpipe in industry On automatic valve two is installed, the cooling water outlet of the water circulating pump is connected to circulation water gutter；The water circulating pump Circulating water outlet is connect by No.1 recirculated water conveyance conduit with level-one self-cleaning filter, and in No.1 recirculated water conveyance conduit On automatic valve three is installed, the level-one self-cleaning filter passes through No. two recirculated water conveyance conduits and second level self-cleaning filtering Device connection；The water production pipeline of the second level self-cleaning filter is divided into two-way, all the way the cooling water of water production pipeline and water circulating pump Import connection, and turbidimeter and automatic valve one are installed in the water production pipeline all the way, another way water production pipeline and circulation Water gutter connection, and automatic valve four is installed in the another way water production pipeline.

Further, the backwash row of the backwash drainage pipeline of the level-one self-cleaning filter and second level self-cleaning filter Waterpipe is connected to circulation water gutter.

Further, the turbidimeter is mounted on the production water out of second level self-cleaning filter, and the automatic valve one is pacified Mounted in the cooling water inlet of water circulating pump.

Process flow is as follows:

1) in water circulating pump initial start stage, automatic valve two is opened, and automatic valve one and automatic valve three are closed, water circulating pump Cooling water uses industry water；

2) after water pump operation to be recycled is stablized, automatic valve three and automatic valve four are opened, level-one self-cleaning filter and second level Self-cleaning filter puts into operation, and the initial stage production water that level-one self-cleaning filter and second level self-cleaning filter are run is drained into and is followed Ring water gutter；

3) turbidimeter is monitored the producing water water quality of second level self-cleaning filter, turbidimeter and automatic valve three and automatic valve Door is four chain, to second level self-cleaning filter stable water production, and after turbidity meets industry water water quality requirement, opens automatic valve One, close automatic valve four and automatic valve two；The cooling water of water circulating pump is all using the recirculated water of processing qualification at this time；

4) the cooling water draining of water circulating pump, level-one self-cleaning filter and the backwash draining of second level self-cleaning filter, level-one The unqualified production water of self-cleaning filter and second level self-cleaning filter drains into circulation water gutter；

5) before water circulating pump prepares termination of pumping, because water circulating pump rate of discharge is unstable, cooling water water source switching need to be returned industry Water；Automatic valve two and automatic valve four are opened, automatic valve one and automatic valve three are closed, cooling water is completed and switches back into work The step sequence of industry water；

6) when the circulating water outlet variation water quality of water circulating pump is larger, when the production water turbidity of second level self-cleaning filter is unqualified, Cooling water water source switching need to be returned industry water；Automatic valve two and automatic valve four are opened, automatic valve one and automatic is closed Valve three completes the step sequence that cooling water switches back into industry water.

The present invention does not cut off industrial colling water source, when self-cleaning filter failure or self-cleaning filter produce water and do not conform to It when lattice, may be implemented to automatically switch back into industrial colling function, to guarantee the safe and stable operation of water circulating pump.

Compared with prior art, the present invention having the following advantages that and effect:

(1) present invention can effectively save industrial water consumption, Ke Yi great using the recirculated water of water circulating pump itself as cooling water It is big to reduce unit generated energy, water withdrawal.

(2) water outlet of second level self-cleaning filter is directly connected to the cooling water pipe import of water circulating pump, simultaneously because for the treatment of process Non- dosing, thus cooling water complete heat exchange after can directly with recirculated water drain outlet, self-cleaning filter backwash draining directly with Recirculated water drains outlet, reaches the closed loop procedure that cooling water is derived from recirculated water, is discharged into recirculated water after use, which does not change Become the water quality of recirculated water.

(3) on the circulating water pipeline extracted, on the industrial waterpipe of water circulating pump cooling water inlet, second level self-cleaning An automatic valve is respectively set in the water production pipeline of filter, to realize the automatic switching function of industry water and recirculated water.

(4) turbidimeter is set in second level self-cleaning filter water production pipeline, turbidimeter and each automatic valve are chain, When realizing that second level self-cleaning filter production water is unqualified, cooling water automatically switches to the function of industry water.

Detailed description of the invention

Fig. 1 is existing water circulating pump cooling water working principle flow chart.

Fig. 2 is the working principle flow chart of the embodiment of the present invention.

In figure: automatic valve 1, turbidimeter 2, level-one self-cleaning filter 3, second level self-cleaning filter 4, automatic valve 25, automatic valve 36, water circulating pump 7, automatic valve 48, circulation water gutter 9, industry come waterpipe 10, No.1 recirculated water 11, No. two recirculated water conveyance conduits 12 of conveyance conduit.

Specific embodiment

The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair Bright explanation and the invention is not limited to following embodiments.