CN214887536U

CN214887536U - Condensate pump degree of depth frequency conversion adjustment oxygen-eliminating device of thermal power plant

Info

Publication number: CN214887536U
Application number: CN202121074201.8U
Authority: CN
Inventors: 文壮选; 李盛平; 王兴武; 冯登贵
Original assignee: Qinghai Huanghe Hydropower Development Co ltd Xining Power Generation Branch; Qinghai Huanghe Hydropower Development Co Ltd; Huanghe Hydropower Development Co Ltd
Current assignee: Qinghai Huanghe Hydropower Development Co ltd Xining Power Generation Branch; Qinghai Huanghe Hydropower Development Co Ltd; Huanghe Hydropower Development Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2021-11-26
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses a condensate pump degree of depth variable frequency adjustment oxygen-eliminating device of thermal power plant relates to the oxygen-eliminating device field, including the device main part, the inside of device main part is provided with the reposition of redundant personnel subassembly, and the subassembly that draws water is installed at the top of device main part, and the blast pipe is all installed to the top both sides of device main part. The utility model discloses a drop condensate pump frequency conversion adjustment minimum frequency value to 27.5HZ by 35HZ, through with the condensate water bus pressure low interlock tripping operation chemistry finish treatment pressure definite value revision for 0.8MPa, through revising reserve condensate pump interlock starting pressure definite value for 0.8MPa, adjustment to condensate pump frequency conversion optimization more than through, condensate pump converter frequency can carry out the free regulation more than 27.5HZ, the deaerator water level can realize completely that the condensate pump converter is adjusted more than 45% rated load to corresponding unit, need not to adjust the throttle through condensate water to deaerator upper water supply regulation door throttle, through optimizing the adjustment, condensate pump power consumption can drop to about 0.13%, reach domestic leading level, and energy saving and consumption reduction effect is obvious.

Description

Condensate pump degree of depth frequency conversion adjustment oxygen-eliminating device of thermal power plant

Technical Field

The utility model relates to a deaerator field specifically is a condensate pump degree of depth variable frequency adjustment deaerator of thermal power plant.

Background

In domestic thermal power unit, some unit oxygen-eliminating device water levels are adjusted to oxygen-eliminating device water level regulating gate through condensate pump export, some units have realized condensate pump frequency conversion adjustment oxygen-eliminating device water level through technical transformation, but the unit that has realized condensate pump frequency conversion transformation considers the resonance problem of condensate pump when low rotational speed moves and condensate water pressure hangs down and leads to chemical finishing tripping operation problem, condensate pump frequency conversion adjustment oxygen-eliminating device water level only can exert the energy-conserving effect of frequency conversion at high frequency stage (35 HZ-50 HZ), when condensate pump frequency is less than 35HZ, still adjust the oxygen-eliminating device water level through condensate water to oxygen-eliminating device upper water regulating gate, this kind of operational mode is unfavorable to condensate pump energy-conserving operation.

The existing deaerator for thermal power plants is characterized in that when a thermal power unit generally carries out deep peak regulation, the load of the unit runs at 50% of rated load even below the rated load for a long time, under the working condition, the frequency of a frequency converter of a corresponding condensate pump needs to be reduced to 27.5HZ, but the frequency of the frequency converter of the domestic condensate pump can only be reduced to more than 35HZ to play an energy-saving effect, so that the maximum energy-saving potential cannot be played by frequency-conversion regulation of the condensate pump in a 27.5-35 HZ interval, the power consumption of the condensate pump is high and about 0.22% of the power consumption of the condensate pump is generally achieved in China, and the operating economy of the condensate pump is poor; simultaneously water enters into the inside back of oxygen-eliminating device, and the oxygen of aquatic can be by the inside high temperature steam oxidation of oxygen-eliminating device, nevertheless because a large amount of water stews in the oxygen-eliminating device for the water that is close to high temperature steam pipe contacts and is changeed the oxidation with high temperature air more easily, and the water of keeping away from high temperature steam pipe then is more difficult to contact with high temperature air, leads to this part of water to be difficult to by quick oxidation, and then has reduced the deoxidization effect of oxygen-eliminating device.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model aims at providing a condensate pump degree of depth variable frequency adjustment oxygen-eliminating device of thermal power plant to energy-conserving effect when the condensate pump operation in solving the oxygen-eliminating device is relatively poor with the lower technical problem of deoxidization effect of oxygen-eliminating device.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a condensate pump degree of depth variable frequency adjustment oxygen-eliminating device of thermal power plant, includes the device main part, the inside of device main part is provided with the reposition of redundant personnel subassembly, the subassembly that draws water is installed at the top of device main part, the blast pipe is all installed to the top both sides of device main part.

By adopting the technical scheme, partial heat generated by the work of the electric heating rod can be discharged through the exhaust pipe, and all heat is prevented from being accumulated in the device main body, so that the air pressure in the device main body can be stable, and the running safety of the device is improved.

Further, the reposition of redundant personnel subassembly is including deoxidization board and flow distribution plate, a plurality of limbers have been seted up to the inside of deoxidization board, the internally mounted of limbers has the electrical heating stick, the top of deoxidization board is fixed with a plurality of baffles, the top of flow distribution plate runs through there are a plurality of diffluence holes, the quantity of diffluence hole is the same with the quantity of limbers, diffluence hole and limbers one-to-one, the diameter of diffluence hole is less than the diameter of limbers.

Through adopting above-mentioned technical scheme, water gets into can flow into to the flow distribution plate after the inside of device main part on, water flows into to the inside of limbers through the reposition of redundant personnel hole again, and electric heating rod work production of heat can carry out the deoxidization to the water through the limbers, and because reposition of redundant personnel hole and limbers hole one-to-one, and then can make the smooth inside of flowing into to the limbers of water, thereby can improve the deoxidization effect of oxygen-eliminating device.

Further, it is a plurality of the baffle equidistance distributes in the top of deoxidization board, the top of deoxidization board is connected with the flow distribution plate, the both sides of baffle are all smooth.

Through adopting above-mentioned technical scheme, the existence of baffle can make rivers flow into to corresponding limbers inside, avoids rivers to other department, and the both sides of baffle are smooth simultaneously can avoid water to accumulate on the baffle, can make the water that spatters on the baffle still can flow into the inside of limbers.

Furthermore, the subassembly of drawing water is including first condensate pump and second condensate pump, the play water end of first condensate pump is connected with and extends to the inside female pipe of first condensate pump of device main part, the play water end of second condensate pump is connected with the female pipe of second condensate pump, the female pipe of second condensate pump is linked together with the female pipe of first condensate pump, the surface mounting of the female pipe of second condensate pump has the solenoid valve, the bottom of the female pipe of first condensate pump is located the flow distribution plate directly over.

Through adopting above-mentioned technical scheme, can make water flow in to the flow distribution plate through the female pipe of first condensate water on to the flow distribution plate shunts water, when needs use second condensate pump, water also can flow in to the device main part through the female pipe of second condensate water simultaneously, and the solenoid valve can prevent that the rivers in the female pipe of first condensate water from flowing into the inside of the female pipe of second condensate water.

Furthermore, the bases are welded on two sides of the bottom of the device main body, and a water outlet pipe is connected to the middle position of the bottom of the device main body.

Through adopting above-mentioned technical scheme, the base can improve the stability of device main part simultaneously, and the water accessible outlet pipe discharge after the deoxidization.

Furthermore, two guide plates are installed below the interior of the device main body, one side of each guide plate inclines downwards along the direction of the water outlet pipe, and the top of each guide plate is smooth.

Through adopting above-mentioned technical scheme, by the water after the deoxidization can flow into to the guide plate on, water can flow to the inside of outlet pipe through the guide plate to discharge through the outlet pipe, simultaneously because the smooth and direction downward sloping along the outlet pipe in guide plate top, and then can accelerate the speed that rivers flow, and improved water efficiency.

Furthermore, the flow distribution plate is in a reverse V shape, the top of the flow distribution plate is rough, and the flow distribution plate is positioned right above the oxygen removing plate

Through adopting above-mentioned technical scheme to the rivers can flow to its both sides after on the flow distribution plate, then inside that water accessible flow splitting hole flows into the limbers, and the top of flow distribution plate is crude simultaneously can slow down the speed that water flows, makes the hydroenergy flow into inside all limbers.

To sum up, the utility model discloses mainly have following beneficial effect:

1. the utility model discloses a be provided with second condensate pump and the female pipe of second condensate, through reducing the minimum frequency value of condensate pump frequency conversion adjustment to 27.5HZ by 35HZ, through with the low interlocking trip chemistry finishing pressure definite value revision of condensate pipe pressure 0.8MPa, through revising reserve condensate pump interlock starting pressure definite value to 0.8MPa, through the adjustment of above optimizing condensate pump frequency conversion, condensate pump converter frequency can freely be adjusted above 27.5HZ, it can realize the condensate pump converter completely to correspond the unit deaerator water level more than 45% rated load and adjust the condensate pump converter, need not to adjust the throttle through condensate water to deaerator upper water regulating gate throttle. Through optimization and adjustment, the power consumption of the condensate pump can be reduced to about 0.13 percent, the domestic advanced level is reached, the coal consumption of the unit is reduced by 0.288g/kWh, and the energy-saving and consumption-reducing effects are obvious.

2. The utility model discloses a be provided with flow distribution plate, reposition of redundant personnel hole, limbers hole and baffle, after rivers flowed into on the flow distribution plate, rivers can flow to everywhere in the reposition of redundant personnel hole, and flow into the flow distribution plate inside through the reposition of redundant personnel hole, thereby can shunt water, and the water after the reposition of redundant personnel can flow to the limbers hole inside, and contact with high temperature air, and because water is shunted after, can make flowing hydroenergy contact with high temperature air comparatively thoroughly, thereby can make the oxygen in the water and other gas thoroughly removed, and then improved the deoxidization effect to water; meanwhile, due to the action of the baffle, water can flow into the corresponding water through holes through the diversion holes, and the water is prevented from flowing to the other parts.

Drawings

FIG. 1 is a schematic perspective view of the main body of the device of the present invention;

FIG. 2 is a schematic view of the front cross-section structure of the device body of the present invention;

fig. 3 is a schematic view of the three-dimensional structure of the oxygen removing plate of the present invention.

In the figure: 1. a device main body; 2. an exhaust pipe; 3. a water pumping assembly; 301. a first condensate pump; 302. a first condensate header; 303. an electromagnetic valve; 304. a second condensate header; 305. a second condensate pump; 4. a water outlet pipe; 5. a baffle; 6. a flow diversion assembly; 601. a flow distribution plate; 602. a shunt hole; 603. a baffle plate; 604. an oxygen scavenging plate; 605. a water through hole; 7. the rod is electrically heated.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

The following describes an embodiment of the present invention according to its overall structure.

A thermal power plant condensate pump depth variable frequency adjustment deaerator is shown in figures 1-2 and comprises a device main body 1, wherein a flow dividing assembly 6 is arranged inside the device main body 1, a water pumping assembly 3 is arranged at the top of the device main body 1, and exhaust pipes 2 are arranged on two sides of the top of the device main body 1; part of heat generated by the operation of the electric heating rod 7 can be discharged through the exhaust pipe 2, so that all heat is prevented from being accumulated in the device main body 1; the bases are welded on two sides of the bottom of the device main body, and meanwhile, the bases can improve the stability of the device main body 1; a water outlet pipe 4 is connected to the middle position of the bottom of the device main body; the deaerated water can be discharged through a water outlet pipe 4, two guide plates 5 are arranged below the inner part of the device main body 1, one side of each guide plate 5 inclines downwards along the direction of the water outlet pipe 4, and the top of each guide plate 5 is smooth; the water after being deoxidated can flow into to guide plate 5 on, water can be through the inside of guide plate 5 flow direction outlet pipe 4 to discharge through outlet pipe 4, simultaneously because the smooth and direction downward sloping along outlet pipe 4 in guide plate 5 top, and then can accelerate the speed that rivers flow, and improved water efficiency.

Referring to fig. 2-3, the flow divider assembly 6 comprises an oxygen removing plate 604 and a flow divider 601, wherein the flow divider 601 is in an inverted V shape, the top of the flow divider 601 is rough, and the flow divider 601 is located right above the oxygen removing plate 604; so that water can flow to both sides of the flow distribution plate 601 after flowing on the flow distribution plate, and the rough top of the flow distribution plate 601 can slow down the flow speed of the water; a plurality of water through holes 605 are formed in the oxygen removing plate 604, an electric heating rod 7 is installed in each water through hole 605, a plurality of baffle plates 603 are fixed on the top of the oxygen removing plate 604, the baffle plates 603 are equidistantly distributed on the top of the oxygen removing plate 604, the top of the oxygen removing plate 604 is connected with the flow distribution plate 601, and two sides of each baffle plate 603 are smooth; the existence of the baffle 603 can lead water to flow into the corresponding limber holes 605 to avoid the water flowing to other parts, meanwhile, the two sides of the baffle 603 are smooth to avoid the water from being accumulated on the baffle 603, and the water splashed on the baffle 603 can still flow into the limber holes 605; a plurality of diversion holes 602 penetrate through the top of the diversion plate 601, the number of the diversion holes 602 is the same as that of the water through holes 605, the diversion holes 602 correspond to the water through holes 605 one by one, and the diameters of the diversion holes 602 are smaller than that of the water through holes 605; the water enters the inside of the device main body 1 and then flows into the diversion plate 601, the water flows into the inside of the water through hole 605 through the diversion hole 602 again, the electric heating rod 7 generates heat during working to deoxidize the water passing through the water through hole 605, and the diversion hole 602 and the water through hole 605 correspond to each other one by one, so that the water can smoothly flow into the inside of the water through hole 605, and the deoxidizing effect of the deaerator can be improved.

Referring to fig. 1-2, the water pumping assembly 3 includes a first condensate pump 301 and a second condensate pump 305, a first condensate header 302 extending into the apparatus main body 1 is connected to a water outlet end of the first condensate pump 301, a second condensate header 304 is connected to a water outlet end of the second condensate pump 305, the second condensate header 304 is communicated with the first condensate header 302, an electromagnetic valve 303 is installed on an outer surface of the second condensate header 304, and a bottom end of the first condensate header 302 is located right above the diversion plate 601; the water can be flowed into the diversion plate 601 through the first condensate header 302, so that the diversion plate 601 diverts the water, and when the second condensate pump 305 is needed, the water can be flowed into the device main body 1 through the second condensate header 304, and the electromagnetic valve 303 can prevent the water in the first condensate header 302 from flowing into the second condensate header 304.

The working principle is as follows: firstly, a user installs and connects a deaerator, reduces the frequency conversion adjustment lowest frequency value of the first condensate pump 301 and the second condensate pump 305 from 35HZ to 27.5HZ, revises the pressure setting value of the low interlock trip chemical finishing pressure of the first condensate main pipe 302 and the second condensate main pipe 304 to 0.8MPa, revises the pressure setting value of the second condensate pump 305 to 0.8MPa, then starts the first condensate pump 301 and the electric heating rod 7, the first condensate pump 301 works to extract water, the water flows into the diversion plate 601 through the first condensate main pipe 302, the water flow can flow to both sides after flowing on the diversion plate 601, then the water can flow into the inside of the water through the diversion hole 602, the electric heating rod 7 works to heat the air, the oxygen in the water is removed after the water is contacted with the high temperature air, the deaerated water flows into the diversion plate 5, and flow to the inside of outlet pipe 4 through guide plate 5 to again discharge through outlet pipe 4, when needs use second condensate pump 305, the user starts second condensate pump 305 and solenoid valve 303, and the inside that the water can flow into first condensate pipe 302 through second condensate pipe 304 after solenoid valve 303 opens, thereby flows into the top of flow distribution plate 601 again.

Although embodiments of the present invention have been shown and described, it is intended that the present embodiments be illustrative only and not limiting to the invention, and that the particular features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples, and that modifications, substitutions, variations, and the like, which are not inventive in light of the above teachings, may be made to the embodiments by those skilled in the art without departing from the principles and spirit of the present invention, but are to be construed as broadly as the following claims.

Claims

1. The utility model provides a condensate pump degree of depth frequency conversion adjustment oxygen-eliminating device of thermal power plant, includes device main part (1), its characterized in that: the device is characterized in that a flow dividing assembly (6) is arranged inside the device main body (1), a water pumping assembly (3) is installed at the top of the device main body (1), and exhaust pipes (2) are installed on two sides of the top of the device main body (1).

2. The thermal power plant condensate pump depth variable frequency adjustment oxygen remover of claim 1, characterized in that: reposition of redundant personnel subassembly (6) are including removing oxygen plate (604) and flow distribution plate (601), a plurality of limbers (605) have been seted up to the inside of removing oxygen plate (604), the internally mounted of limbers (605) has electric heating rod (7), the top of removing oxygen plate (604) is fixed with a plurality of baffles (603), the top of flow distribution plate (601) is run through has a plurality of flow distribution holes (602), the quantity of flow distribution hole (602) is the same with the quantity of limbers (605), flow distribution hole (602) and limbers (605) one-to-one, the diameter of flow distribution hole (602) is less than the diameter of limbers (605).

3. The thermal power plant condensate pump depth variable frequency adjustment oxygen remover of claim 2, characterized in that: the baffles (603) are equidistantly distributed on the top of the oxygen removing plate (604), the top of the oxygen removing plate (604) is connected with the flow distribution plate (601), and two sides of each baffle (603) are smooth.

4. The thermal power plant condensate pump depth variable frequency adjustment oxygen remover of claim 1, characterized in that: the water pumping assembly (3) comprises a first condensate pump (301) and a second condensate pump (305), the water outlet end of the first condensate pump (301) is connected with a first condensate main pipe (302) extending to the inside of the device main body (1), the water outlet end of the second condensate pump (305) is connected with a second condensate main pipe (304), the second condensate main pipe (304) is communicated with the first condensate main pipe (3025), an electromagnetic valve (303) is installed on the outer surface of the second condensate main pipe (304), and the bottom end of the first condensate main pipe (302) is located right above the flow distribution plate (601).

5. The thermal power plant condensate pump depth variable frequency adjustment oxygen remover of claim 1, characterized in that: the device is characterized in that bases are welded on two sides of the bottom of the device body (1), and a water outlet pipe (4) is connected to the middle position of the bottom of the device body (1).

6. The thermal power plant condensate pump depth variable frequency adjustment oxygen remover of claim 1, characterized in that: two guide plates (5) are installed below the inside of the device main body (1), one side of each guide plate (5) inclines downwards along the direction of the water outlet pipe (4), and the top of each guide plate (5) is smooth.

7. The thermal power plant condensate pump depth variable frequency adjustment oxygen remover of claim 2, characterized in that: the flow distribution plate (601) is in an inverted V shape, the top of the flow distribution plate (601) is rough, and the flow distribution plate (601) is positioned right above the oxygen removing plate (604).