CN112420337B - Be applied to heat collection device of thermal power plant's transformer - Google Patents
Be applied to heat collection device of thermal power plant's transformer Download PDFInfo
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- CN112420337B CN112420337B CN202011355286.7A CN202011355286A CN112420337B CN 112420337 B CN112420337 B CN 112420337B CN 202011355286 A CN202011355286 A CN 202011355286A CN 112420337 B CN112420337 B CN 112420337B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/085—Cooling by ambient air
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
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Abstract
The invention discloses a heat collecting device applied to a transformer of a thermal power plant, which comprises a collecting cover, an exhaust pipeline, a flow sensor and a pressure sensor, wherein the exhaust pipeline comprises a main pipeline and at least two branch pipelines, each branch pipeline is respectively connected with the main pipeline, each branch pipeline is connected with a plurality of collecting covers, each branch pipeline is provided with the flow sensor, and the main pipeline is provided with the pressure sensor. The heat collecting device collects heat dissipation of the transformer of the thermal power plant, and transmits the collected heat to related equipment needing to be heated in the operation process, so that the consumption of the equipment on energy in the operation process is reduced, and the energy is saved.
Description
Technical Field
The invention relates to the field of energy conservation and consumption reduction of a thermal power plant, in particular to a heat collecting device applied to a transformer of the thermal power plant.
Background
The cooling system of the main transformer of the current large-scale thermal power plant is basically designed by strong oil air cooling, the cooler of each group of main transformer takes away the heat generated in the operation of the main transformer by arranging 4 groups of cooling fans and 1 group of oil pumps, and a set of electric control system is arranged to control the operation of the cooling fans according to the temperature of the main transformer. The set of heat dissipation system consumes auxiliary power to take away heat generated by the main transformer, and a large amount of electric energy and heat are wasted. In addition, the prior art also includes that the heat of the main transformer is utilized by arranging a water cooling system, but the possibility of water inflow of the main transformer cooling insulating oil is brought, the safety risk is too high, and the method cannot be widely implemented.
Disclosure of Invention
The invention provides a heat collecting device applied to a transformer of a thermal power plant, aiming at the technical problems of energy waste and high safety risk in the process of radiating the transformer of the thermal power plant in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a be applied to heat collection device of thermal power plant's transformer, contains and collects cover, exhaust pipe way, flow sensor and pressure sensor, exhaust pipe way contains a main line and two at least bleeder lines, every bleeder line respectively with the main line is connected, it is a plurality of to connect on every bleeder line collect the cover, set up on every bleeder line flow sensor, set up on the main line pressure sensor.
In the invention, the flow sensor is used for measuring the air volume in the exhaust pipeline, and the pressure sensor is used for measuring the air pressure in the exhaust pipeline. And the flow sensor and the pressure sensor transmit the detection value signals to the control system in a wired or wireless mode. The flow sensor and the pressure sensor can be selected from a wireless pressure sensor and a wireless flowmeter.
The flow sensor and the pressure sensor can transmit the air volume and the air pressure in the exhaust pipeline to the control system in real time, and provide reference conditions for the control system to start or close the transformer cooling fan. On the premise that the air volume or the air pressure reaches the set conditions, the control system can pause or not start part of the heat dissipation fans, so that the energy consumption of the heat dissipation fans is reduced, and the energy is saved. In addition, the flow sensor is arranged in each branch pipeline for measuring the air volume, so that the measurement precision is improved, and a control system can make timely and accurate control decisions.
The number of the collecting hoods connected to each branch line is 2 to 10, preferably 4 to 8.
The heat collecting device provided by the invention collects heat dissipation of the transformer of the thermal power plant as much as possible through the plurality of collecting covers arranged on each branch pipeline, and transmits the collected heat to related equipment needing to be heated in the operation process, such as a primary fan, through the main pipeline, so that the energy consumption of the equipment in the operation process is reduced, and the energy is saved.
Further, each branch pipeline is also provided with the pressure sensor. The wind pressure value abnormity detected by the pressure sensor arranged on the branch pipeline, such as the value is fluctuated sharply or deviates from the normal value too much, can be used as the alarm signal of the fault of the branch pipeline, and plays a role in monitoring the branch pipeline.
Furthermore, the collecting cover is conical, the air outlet of the collecting cover is connected with the branch pipeline, and the air inlet of the collecting cover is provided with a flexible connecting device. Specifically, the air outlet of the collecting cover is connected with the branch pipeline in a welding mode.
The cross-sectional area of the air inlet of the collecting cover is larger than that of the air outlet of the collecting cover, so that the collecting cover is integrally conical. The conical configuration is convenient for the collection cover to collect the fan of thermal power plant's transformer and gather in the exhaust pipe way with the collection.
The flexible connecting device comprises a buffering sponge block, an adhesive tape or a square foldable awning. In the invention, the flexible connecting device is used as a connecting structure of the air inlet of the collecting cover and the radiator of the transformer, and has the technical effects of fastening connection and buffering.
Furthermore, the branch pipeline is L-shaped, and a nonmetal compensator is arranged at the joint of the horizontal pipeline and the vertical pipeline of the L-shaped branch pipeline. The nonmetal compensator is a device for absorbing axial and radial displacement of a pipeline system caused by expansion and contraction or other reasons. The material of the nonmetal compensator comprises fiber fabric or rubber. The non-metal compensator is used in the L-shaped branch pipeline, and has the function of compensating the vertical pipeline displacement of the branch pipeline.
Further, the heat collecting device further comprises a lifting adjusting device, and the lifting adjusting device is respectively connected with the collecting cover and the exhaust pipeline. And a pulley is arranged at the bottom of the lifting adjusting device. In one embodiment of the present invention, the lifting adjusting device comprises a lifting adjusting support rod with a pulley mounted at the bottom.
Further, the heat collecting device further comprises a guide rail. The lifting adjusting device moves on the guide rail through a pulley.
The lifting adjusting device and the guide rail are beneficial to transportation and installation of the heat collecting device.
In the prior art, a primary air fan of a thermal power plant is a device for providing drying air for a coal mill and feeding pulverized coal into a hearth, and hot primary air can enter the coal mill and the hearth only after being heated by an air preheater; and because the cold end temperature of the air preheater must be kept above 150 ℃, a steam heater is often arranged at the outlet of the primary air fan in winter to improve the primary air temperature, high-quality steam is consumed, resistance is brought to the primary air system, and the energy consumption of the primary air fan is improved.
In order to solve the technical problem of high energy consumption caused by heat utilization devices such as a primary fan of a thermal power plant and the like in the operation process in the prior art, the invention provides a heat dissipation recycling system of a transformer of the thermal power plant, which comprises any one of the heat collecting device, the transformer, the radiator, the fan and the heat utilization device which are applied to the transformer of the thermal power plant, two opposite side surfaces of the transformer are respectively connected with a plurality of groups of radiators, any group of radiators is connected with a plurality of fans, the radiators on the same side surface of the transformer are arranged corresponding to a plurality of collecting covers connected with at least one branch pipeline in the heat collecting device, the air inlet of the collecting cover is connected with the correspondingly arranged radiator, the collecting cover covers the plurality of fans connected to the radiator in the cavity of the collecting cover, and the outlet of the exhaust pipeline of the heat collecting device is connected with the heat utilization device.
In the heat dissipation recycling system for the transformer of the thermal power plant, the heat collecting device collects the heat taken away by the transformer radiator through the fan and introduces the heat into the heat utilization device for use, so that the energy consumption of the heat utilization device is reduced, and the energy is saved.
The transformer of the invention comprises a main transformer and a slave transformer, preferably a main transformer.
The number of heat sinks connected to either side of the transformer in the present invention is 4 to 12 groups, preferably 6 to 8 groups.
The number of fans connected to any group of radiators in the invention is 2-8, preferably 4-6. The fan is fixedly connected to the outer side of the heat dissipation side face of the radiator through a support or a base.
In the invention, a plurality of collecting covers connected on one branch pipeline can correspond to a plurality of groups of radiators connected with the same side face of the transformer one by one, and in addition, more than two collecting covers can also correspond to the same group of radiators.
In a preferred embodiment of the present invention, 4 collecting hoods are connected to one branch line of the heat collecting device, 4 groups of radiators are connected to one side of the transformer, and 1 collecting hood on the branch line is connected to 1 group of radiators in the 4 groups of radiators connected to the side of the transformer.
Further, the air inlet of the collecting cover is connected with the radiator through the flexible connecting device. Specifically, the flexible connecting device is connected with the external steel plate of the radiator through the rivet, so that air leakage is avoided, and acting force between the heat collecting device and the radiator is reduced as much as possible.
Further, the heat utilization device comprises a primary air fan.
In a preferred embodiment of the present invention, the heat collecting device is a primary air fan, an exhaust duct outlet of the heat collecting device is connected to an inlet duct section of the primary air fan, and specifically, the exhaust duct outlet of the heat collecting device is located in an opening of the inlet duct section of the primary air fan. The high negative pressure of the inlet when the primary air fan operates is utilized, the heat of the transformer radiator is brought into the primary air system through the heat collecting device, the temperature of primary air is effectively improved, the operation of the air fan connected with the original radiator is not needed, and meanwhile, the energy consumption of the primary air fan and the energy consumption of the transformer are reduced.
On the other hand, the invention provides a fan control method of the heat-engine plant transformer heat dissipation recycling system, which comprises the following steps:
acquiring and summing current air volume values measured by flow sensors arranged on each branch pipeline to obtain a current total air volume value Q1;
acquiring a current wind pressure value P1 through a pressure sensor arranged on the main pipeline;
acquiring a current load value E1 of the generator set and a current temperature value T1 of the transformer oil;
on the premise of meeting any condition in a first condition set, starting the fans connected to a set number of radiators in multiple groups of radiators connected to one side of the transformer, and simultaneously starting the fans connected to the same set number of radiators in multiple groups of radiators connected to the other side opposite to the side, wherein the first condition set comprises the following conditions:
t1 > a first temperature threshold, or,
p1 < first wind pressure threshold, and E1 > first load threshold, or,
q1 < first air volume threshold, and E1 > first load threshold.
In the invention, starting the fans connected to the radiator specifically means starting all the fans connected to the radiator.
In the invention, on the premise of meeting any condition in the first condition set, the fans connected with the radiators with the same number in the multiple groups of radiators connected with the two sides of the transformer are simultaneously started, so that the transformer can be uniformly radiated, the temperature difference of copper oil in the transformer is reduced, and the insulation of the coil is prevented from being damaged.
Furthermore, the fans which are connected on the radiators with the same number and opposite connection positions and connected to the two sides of the transformer are simultaneously started.
Further, the specific values of the first temperature threshold value can be selected from 60 ℃ and 65 ℃, the specific values of the first wind pressure threshold value can be selected from-70 Pa, -75Pa and-80 Pa, the first load threshold value can be selected from 500MW and 600MW, and the first wind volume threshold value can be selected from 80m3/s、85m3/s、90m3/s。
The fan is controlled to be started through a control system, and the control system specifically comprises but is not limited to a DCS system, a PLC system, and other terminals or servers for running software.
Further, after the fans connected to the radiators with the set number in the multiple groups of radiators connected to one side of the transformer and the fans connected to the radiators with the same set number in the multiple groups of radiators connected to the other side opposite to the side are simultaneously started to operate, the current air volume values measured by the flow sensors arranged on each branch pipe are obtained again and summed, so that a current total air volume value Q2 is obtained;
the current wind pressure value P2 is obtained again through a pressure sensor arranged on the main pipeline;
obtaining the current load value E2 of the generator set and the current temperature value T2 of the transformer oil again;
on the premise of meeting any condition in a second condition set, starting the fans connected to the radiators which are not started by all the fans connected to the two opposite sides of the transformer, wherein the second condition set comprises the following conditions:
t2 > a second temperature threshold, or,
p2 < second wind pressure threshold, and E2 > second load threshold, or,
q2 < second air volume threshold, and E2 > second load threshold;
wherein the second temperature threshold is greater than the first temperature threshold, and the difference between the second temperature threshold and the first temperature threshold is greater than or equal to 10 ℃; the first wind pressure threshold value is larger than the second wind pressure threshold value, and the difference value between the first wind pressure threshold value and the second wind pressure threshold value is larger than or equal to 30 Pa; the second air volume threshold is larger than the first air volume threshold, and the difference value between the second air volume threshold and the first air volume threshold is more than or equal to 20m3S; the second loading threshold is larger than the first loading threshold, and the difference value between the second loading threshold and the first loading threshold is larger than or equal to 200 MW.
Further, the specific values of the second temperature threshold value can be 70 ℃ and 75 ℃, the specific values of the first wind pressure threshold value can be-100 Pa, -105Pa and-110 Pa, the second load threshold value can be 700MW and 800MW, and the first wind volume threshold value can be 100m3/s、105m3/s、110m3/s。
On the other hand, the invention provides a fan control method of the heat-engine plant transformer heat dissipation recycling system, which comprises the following steps:
and acquiring an automatic breaker breaking signal sent by the heat utilization device, and starting the fans connected to all the radiators connected to the two opposite sides of the transformer.
In the invention, when the heat utilization device cannot normally work due to the automatic disconnection of the circuit breaker (namely tripping), the transformer in the heat dissipation and recycling system of the transformer of the thermal power plant cannot take away the heat of the transformer radiator through the operation of the heat utilization device (such as high negative pressure generated when a primary fan operates). Under the condition, in order to avoid the too fast temperature rise of the transformer oil, all fans connected to the transformer radiator need to be started, so that the purpose of quickly cooling the transformer oil is achieved.
Compared with the prior art, the invention has the following beneficial effects:
(1) the heat collecting device collects heat dissipation of the transformer of the thermal power plant, and transmits the collected heat to related equipment needing to be heated in the operation process, so that the consumption of the equipment on energy in the operation process is reduced, and the energy is saved.
(2) The flow sensor is arranged in each branch pipeline, so that the total air quantity in the exhaust pipeline can be accurately and timely obtained, and a control system can make timely and accurate control decisions.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and 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 and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a heat collecting device according to an embodiment of the present invention.
Fig. 2 is a schematic cross-sectional structure diagram of a heat collecting device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a heat dissipation recycling system of a transformer in a thermal power plant according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of a connection structure of a set of heat sinks and a collection cover according to an embodiment of the present invention.
The reference numbers in the drawings are as follows:
m-a heat collection device; 1,1A,1B,1C, 1D-collection hood; 2-a pressure sensor; 3-a flow sensor; 4-a non-metallic compensator; 5-a flexible connection means; 6-lifting and adjusting the supporting rod; 7-a guide rail; 8-a main transformer; 9A,9B,9C,9D,9A,9B,9C, 9D-heat sink; 10-a fan; 11-an inlet rectangular straight pipe section of the primary air fan; s-an exhaust pipeline; s1-main line; s11, S12-branch lines.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram, and includes a collecting hood 1, an exhaust duct S, a flow sensor 3, and a pressure sensor 2, where the exhaust duct S includes a main duct S1, two branch ducts S11 and S12, the branch ducts S11 and S12 are L-shaped, the L-shaped branch duct includes a horizontal duct and a vertical duct, the vertical ducts of the branch ducts S11 and S12 are respectively connected to 4 collecting hoods 1, the flow sensor 3 and the pressure sensor 2 are respectively disposed on the branch ducts S11 and S12, and the main duct S1 is disposed on the pressure sensor 2. And a nonmetal compensator 4 is arranged at the joint of the horizontal pipeline and the vertical pipeline of the L-shaped branch pipeline.
The specific example of the heat collecting device provided by the invention also comprises a flexible connecting device 5 arranged at the air inlet of the collecting cover 1, a lifting adjusting support rod 6 with a pulley arranged at the bottom and a guide rail 7. The lifting adjusting support rod 6 is respectively connected with the collecting cover 1 and the branch pipeline S11, and the lifting adjusting support rod 6 moves on the guide rail 7 through the pulley at the bottom. The structure schematic diagram is shown in fig. 2.
For the heat dissipation recycling system of the transformer of the thermal power plant and the control method thereof, a specific example takes a certain 1000MW coal-fired thermal power unit as an example, under a rated working condition, the load loss of a main transformer is 2075kW (the load loss of the main transformer is basically in direct proportion to the load), the main transformer is provided with 8 groups of radiators, and each group of radiators is provided with 4 2.2kW cooling fans and an oil pump. The schematic system structure is shown in fig. 3, and includes a heat collecting device M, a main transformer 8, a primary air fan, and 4 sets of radiators connected to two opposite sides of the main transformer 8, wherein a radiator 9A, a radiator 9B, a radiator 9C, and a radiator 9D are connected to one side of the main transformer, a radiator 9A, a radiator 9B, a radiator 9C, and a radiator 9D are connected to the opposite side of the main transformer, and connection positions of the radiators 9A to 9D on the main transformer are opposite to connection positions of the radiators 9A to 9D on the main transformer, for example, connection positions of the radiator 9A and the radiator 9A are opposite. All radiators are the same type of radiator. The radiator 9A, the radiator 9B, the radiator 9C and the radiator 9D are respectively and correspondingly connected with the collecting cover 1A, the collecting cover 1B, the collecting cover 1C and the collecting cover 1D on the branch pipeline S12 of the heat collecting device M, the radiator 9A, the radiator 9B, the radiator 9C and the radiator 9D are respectively and correspondingly connected with the collecting cover 1A, the collecting cover 1B, the collecting cover 1C and the collecting cover 1D on the branch pipeline S11 of the heat collecting device M, and the fan 10 connected to the radiator is covered in a cavity of the collecting cover by the collecting cover. The outlet of the exhaust pipeline of the heat collecting device M is positioned in the open hole of the inlet rectangular straight pipe section 11 of the primary air fan.
Each set of radiators described in this example is connected to 4 fans, and the 4 fans are all located in the cavity of the collecting hood connected to the radiators. Fig. 4 is a schematic cross-sectional view of the connection structure of the heat sink 9A and the collection cover 1A according to the present embodiment. As shown in fig. 4, the air inlet of the collecting cover 1A is connected to the flexible connecting device 5, the collecting cover 1A is connected to the heat sink 9A through the flexible connecting device 5, and 4 fans 10 are connected to the heat sink 9A and located in the cavity of the collecting cover 1A.
The control method of the heat-engine plant transformer heat dissipation recycling system comprises the following steps:
the control system of the thermal power plant acquires and sums current air volume values measured by the flow sensors 3 arranged on the branch pipelines S11 and S12 to obtain a current total air volume value Q1; acquiring a current wind pressure value P1 through a pressure sensor 2 arranged on a main pipeline S1; and acquiring a current load value E1 of the generator set and a current temperature value T1 of the transformer oil. On the premise of meeting any one of the following conditions, the control system simultaneously turns on all fans connected to the radiator 9A and the radiator 9B connected to one side of the main transformer 8, and all fans connected to the radiator 9A and the radiator 9B connected to the opposite side of the main transformer 8:
t1 > 60 ℃, or,
p1 < -70Pa, and E1 > 500MW, or,
Q1＜80m3and E1 > 500 MW.
After the fans connected to the radiators 9A,9B, 9A and 9B are started to operate, the control system acquires the current air volume values measured by the flow sensors 3 arranged on the branch pipelines S11 and S12 again and sums the values to obtain a current total air volume value Q2; the current wind pressure value P2 is obtained again through the pressure sensor 2 arranged on the main pipeline S1; and acquiring the current load value E2 of the generator set and the current temperature value T2 of the transformer oil again, and if any one of the following conditions is also met, the control system turns on all fans connected to the radiator 9C and the radiator 9D connected to one side of the main transformer 8 and all fans connected to the radiator 9C and the radiator 9D connected to the opposite side of the main transformer 8 again:
t2 > 70 ℃, or,
p2 < -100Pa, and E2 > 700MW, or,
Q2＜100m3and E2 > 700 MW.
The other control method of the heat-engine plant transformer heat dissipation recycling system comprises the following steps: the control system acquires an automatic circuit breaker disconnection signal, namely a trip signal, sent by the primary fan, and starts all fans connected to all radiators connected to two opposite side surfaces of the main transformer 8.
The heat-engine plant transformer heat dissipation recycling system has the following advantages:
1. the heat taken away by the radiator of the original main transformer is taken into a primary air system for utilization, the load loss of the main transformer is 4500h × 2075kW 933.75 ten thousand kWh every year according to 4500h of annual utilization of a 1000MW unit, and the loss is converted into heat completely. In the original main transformer heat dissipation design, all the heat will be blown into the atmosphere, and if the system of the present invention is applied, the heat can enter the primary air system and then enter the boiler to be utilized.
2. 32 fans of the original main transformer can be in hot standby and stopped running, the service power can be reduced by 44-64kWh per hour, and the electric quantity can be saved by 31.68-46 thousands kWh according to 7200h of annual running.
3. The main transformer is uniformly radiated, the temperature difference of copper oil in the main transformer is reduced, and the insulation of the coil is prevented from being damaged.
4. Effectively improve the primary air temperature, improve air preheater cold junction temperature, reduce the jam condition to make boiler efficiency obtain promoting.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It is to be understood that, unless otherwise expressly stated or limited, the term "coupled" is used in a generic sense as defined herein, e.g., fixedly attached or removably attached or integrally attached; may be a mechanical connection; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A heat dissipation recycling system of a transformer of a thermal power plant is characterized by comprising a heat collecting device, a transformer, a radiator, a fan and a heat utilization device, wherein the heat collecting device is applied to the transformer of the thermal power plant and comprises a collecting cover, an exhaust pipeline, a flow sensor and a pressure sensor, the exhaust pipeline comprises a main pipeline and at least two branch pipelines, each branch pipeline is respectively connected with the main pipeline, each branch pipeline is connected with a plurality of collecting covers, the flow sensor is arranged on each branch pipeline, and the pressure sensor is arranged on the main pipeline; the heat collector is characterized in that two opposite side surfaces of the transformer are respectively connected with a plurality of groups of radiators, any group of radiators is connected with a plurality of fans, the plurality of groups of radiators on the same side surface of the transformer are correspondingly arranged with a plurality of collecting covers connected on at least one branch pipeline in the heat collecting device, an air inlet of each collecting cover is connected with the corresponding radiator, the collecting covers cover the plurality of fans connected on the radiators in cavities of the collecting covers, and an exhaust pipeline outlet of the heat collecting device is connected with the heat utilization device.
2. The heat recovery and utilization system for transformer of thermal power plant according to claim 1, wherein the heat utilization device comprises a primary air fan.
3. The heat-engine plant transformer heat dissipation recycling system of claim 1, wherein each branch line is further provided with a pressure sensor.
4. The heat-engine plant transformer heat dissipation recycling system of claim 1, wherein the collecting hood is tapered, the air outlet of the collecting hood is connected with the branch pipeline, and the air inlet of the collecting hood is provided with a flexible connecting device.
5. The heat-engine plant transformer heat dissipation recycling system of claim 1, wherein the branch pipeline is L-shaped, and a non-metal compensator is arranged at a joint of a horizontal pipeline and a vertical pipeline of the L-shaped branch pipeline.
6. The heat-engine plant transformer heat dissipation recycling system of claim 1, further comprising a lifting adjusting device, wherein the lifting adjusting device is connected to the collecting hood and the exhaust duct, respectively.
7. A fan control method of a heat-engine plant transformer heat dissipation recycling system according to any one of claims 1 to 6, comprising the steps of:
acquiring and summing current air volume values measured by flow sensors arranged on each branch pipeline to obtain a current total air volume value Q1;
acquiring a current wind pressure value P1 through a pressure sensor arranged on the main pipeline;
acquiring a current load value E1 of the generator set and a current temperature value T1 of the transformer oil;
on the premise of meeting any condition in a first condition set, starting the fans connected to a set number of radiators in multiple groups of radiators connected to one side of the transformer, and simultaneously starting the fans connected to the same set number of radiators in multiple groups of radiators connected to the other side opposite to the side, wherein the first condition set comprises the following conditions:
t1 > first temperature threshold;
p1 < a first wind pressure threshold, and E1 > a first load threshold;
q1 < first air volume threshold, and E1 > first load threshold.
8. The fan control method for the heat-engine plant transformer heat dissipation recycling system according to claim 7, wherein after the fans connected to the radiators with the set number in the multiple sets of radiators connected to one side of the transformer and the fans connected to the radiators with the same set number in the multiple sets of radiators connected to the other side opposite to the one side are simultaneously started to operate, the following steps are performed:
acquiring and summing current air volume values measured by flow sensors arranged on each branch pipeline to obtain a current total air volume value Q2;
acquiring a current wind pressure value P2 through a pressure sensor arranged on the main pipeline;
acquiring a current load value E2 of the generator set and a current temperature value T2 of the transformer oil;
on the premise of meeting any condition in a second condition set, starting the fans connected to the radiators which are not started by all the fans connected to the two opposite sides of the transformer, wherein the second condition set comprises the following conditions:
t2 > a second temperature threshold;
p2 < second wind pressure threshold, and E2 > second load threshold;
q2 < second air volume threshold, and E2 > second load threshold;
wherein the second temperature threshold is greater than the first temperature threshold, and the difference between the second temperature threshold and the first temperature threshold is greater than or equal to 10 ℃; the first wind pressure threshold value is larger than the second wind pressure threshold value, and the difference value between the first wind pressure threshold value and the second wind pressure threshold value is larger than or equal to 30 Pa; the second air volume threshold value is larger than the first air volume threshold value, and the difference value between the second air volume threshold value and the first air volume threshold value is not less than 20m cultivation/s; the second loading threshold is larger than the first loading threshold, and the difference value between the second loading threshold and the first loading threshold is larger than or equal to 200 MW.
9. A fan control method of a heat-engine plant transformer heat dissipation recycling system according to any one of claims 1 to 6, characterized in that an automatic breaker-off signal sent by the heat utilization device is obtained to start the fans connected to all the radiators connected to the two opposite sides of the transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355286.7A CN112420337B (en) | 2020-11-27 | 2020-11-27 | Be applied to heat collection device of thermal power plant's transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011355286.7A CN112420337B (en) | 2020-11-27 | 2020-11-27 | Be applied to heat collection device of thermal power plant's transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112420337A CN112420337A (en) | 2021-02-26 |
| CN112420337B true CN112420337B (en) | 2021-12-24 |
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| CN202011355286.7A Active CN112420337B (en) | 2020-11-27 | 2020-11-27 | Be applied to heat collection device of thermal power plant's transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106524289A (en) * | 2016-11-22 | 2017-03-22 | 四川电力设计咨询有限责任公司 | Heating system based on recycling of heat of high-voltage transformer |
| CN206755125U (en) * | 2017-03-22 | 2017-12-15 | 广东广绿节能环保科技有限公司 | A kind of steam heating extraction device based on Mist heat recovering |
| CN107101890B (en) * | 2017-06-23 | 2018-10-30 | 西南石油大学 | High temperature rock sample strains and sonic test device and test method |
| CN107461797A (en) * | 2017-07-18 | 2017-12-12 | 四川电力设计咨询有限责任公司 | A kind of heating system utilized based on high-tension transformer surface-type recuperation of heat |
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