CN214581524U - Special fresh air cooling and dust removing device for excitation room between frequency converters of power plant - Google Patents

Abstract

The utility model provides a special new trend cooling dust collector between excitation of power plant's converter, it comprises casing and the wave form liquid-gas separation unit, self-cleaning formula dust removal unit, the enthalpy that falls-degree of depth dehydration unit, secondary pressurization unit, the unit of demagnetizing installed in the casing. The air with lower outdoor temperature is primarily dehydrated by the waveform liquid-gas separation unit, large particle dust is removed, further dust is removed by the self-cleaning dust removal unit, and the air is conveyed to the enthalpy reduction-depth dehydration unit; after secondary temperature reduction and dehydration by the enthalpy reduction-deep dehydration unit, conveying the product to a secondary pressurization unit; conveying the mixture to a demagnetizing unit after being pressurized by a secondary pressurizing unit; after being demagnetized by the demagnetizing unit, the air is conveyed to the space between the frequency converters and the excitation room through the air supply duct, and is discharged to the outside after exchanging heat with high-temperature air in the space between the frequency converters and the excitation room. The utility model discloses reduce effectively between the converter, the excitation temperature, not only have cooling, dust removal, new trend function, energy-conservation, environmental protection, running cost are low moreover.

Description

Special fresh air cooling and dust removing device for excitation room between frequency converters of power plant

Technical Field

The utility model relates to a new trend, cooling, dust collector indicate especially one kind be exclusively used in between the power plant's converter, the excitation have new trend, cooling, dust removal function's device.

Background

At present, three problems commonly face between frequency converters and between excitation of various domestic power plants: high temperature, dust deposition and negative pressure.

In order to ensure the normal operation of the equipment, each large power plant usually designs a relatively independent closed space between the frequency converters and the excitation room, so that the intrusion of water vapor and dust in the outside air is avoided, and the normal operation of the electrical equipment is influenced. However, because electrical equipment such as frequency converters and exciters can generate a large amount of heat during operation, and relatively closed air does not circulate between the frequency converters and between the excitations, the heat generated by the electrical equipment cannot be dissipated in time, so that the internal environments of the frequency converters and between the excitations are abnormally high in temperature and heat. The continuous high temperature in the room causes frequent misoperation of the frequency converter and the electrical equipment and rapid increase of failure damage rate, and the service life of the equipment is exponentially reduced along with the rise of the temperature, so that the normal operation and production of the equipment are directly influenced.

In addition, the top parts of the frequency converter cabinet and the electrical equipment cabinet are respectively provided with a heat radiation fan, when the heat radiation fan works, the whole equipment is just like a huge dust collector, air outside the cabinet body is forcibly sucked into the cabinet body, and dust in the air also enters the cabinet body. Because the electric element can form a stable magnetic field when in operation, dust, impurities, floating dust, coal ash, water vapor and the like are adsorbed on the electric element under the action of the magnetic field. When the dust in the electrical equipment is too much, if the weather is wet, electric arc discharge can be generated in the electrical equipment such as a frequency converter, and components are broken down; in addition, dust can also cause the phenomena of electric leakage and overload of a radiator of a power module unit and a circuit board in the frequency converter, so that the power consumption is increased finally, and the service life of the frequency converter is shortened; if dust adheres to the surfaces of the radiator and the heat dissipation fan, poor heat dissipation of the frequency converter can be caused, and the frequency converter can work at high temperature for a long time.

Moreover, negative pressure between frequency converters and between excitation is a common fault in the industry. The main reason for this is that the sealing between the frequency converters and the excitation is too tight, and only the release of hot air to the outside is emphasized, but the supply of cold air to the inside is ignored, and the physical law of aerodynamics is violated, so that the air inside and outside cannot be naturally and smoothly circulated, and a pressure difference phenomenon between the inside and the outside of the room is generated. The harm is as follows: 1. the negative pressure causes that doors and windows between frequency converters and excitation rooms can not be normally opened, and outdoor dust and particle pollutants are forced to be pressed into a room in large quantity, so that large-area indoor passive pollution and dust accumulation are caused. 2. Because the air flow is obstructed, the heat generated by the frequency converter and the large-scale electrical equipment can not be discharged in time, and indoor high temperature and heating are caused.

In order to solve the ubiquitous high temperature problem between the frequency converter and the excitation, at present, the method that the domestic electric power industry generally adopts is: a plurality of high-power air conditioners are additionally arranged; alternatively, an air-water cooling device is installed, however, both of these methods have certain problems. The air conditioner is additionally arranged, a compressor refrigeration technology is utilized, hot air in a frequency converter room and an excitation room is converted into cold air in a forced energy conversion mode, and the frequency converter and electrical equipment are cooled. Its advantage is: the refrigeration mode is simple and direct. The disadvantages are as follows: 1. the limitation is strong. The air conditioner can only play a role in converting and cooling convection hot air, and the refrigeration effect of heat generated by conduction and radiation of electrical equipment is relatively delayed. 2. And (4) indirectly refrigerating. The air conditioner cools down the large environment between the frequency converters and the excitation room, and the large environment cools down the frequency converters and the electrical equipment. The conversion rate and the utilization rate of the cold and hot efficiency are relatively low, so that the air conditioner can run for a long time, the failure rate of the air conditioner is higher and higher along with the increase of time, and the maintenance amount of the air conditioner is increased year by year. 3. The energy consumption is high. According to incomplete statistics, 10 air conditioners with power of 12KW are required to be installed between 1 frequency converter or excitation room with area of 100 square meters, and the electricity charge loss of the light air conditioner reaches 20 ten thousand yuan per year. The electric energy saved by the frequency converter and the electrical equipment is consumed by the air conditioner again in one year, and the purpose of saving energy by utilizing the frequency converter is not achieved. 4. The function is single. The air conditioner has no any effect on the negative pressure inside and outside the frequency converter and the electrical equipment and preventing dust.

The air-water cooling device is installed, heat generated by the frequency converter and the electrical equipment is extracted by the fans on the top of the frequency converter cabinet and the electrical appliance cabinet and enters the water cooler of the air-water cooling device through the air duct, heat exchange is carried out between air and water in the water cooler, and the heat of the air is taken away by cooling water to achieve the purpose of cooling. Its advantage is: and an internal circulation cooling mode is adopted, so that the interference of the external environment is avoided. The disadvantages are as follows: 1. the harmfulness is high. As is known, frequency converters and electrical equipment belong to electronic component products, the requirement on the humidity of air is very strict, and if a water cooling device goes wrong or fails, the frequency converters and the electrical equipment are fatally affected. 2. The air-water cooling device has a complex installation process. In order to achieve the refrigeration effect of the water cooler, a plurality of large-caliber circulating water pipelines are required to be laid on site, some pipelines are hundreds of meters long, the laying and the design of the pipelines are also large projects, the investment is high, and the construction cost and the expense of the pipelines exceed the cost price of a frequency converter and electrical equipment. 3. The air humidity is high. The frequency converter generally contains a large amount of dust, and an air-water cooling device is adopted, so that the humidity of air is increased. Organic matters in the dust and moisture react physically or chemically, so that the dust is easier to conduct electricity, and certain potential use hazards exist for core components such as frequency converters, precise electronic elements in electrical equipment, power units and the like.

How to scientifically and effectively reduce the temperature and dust in the converter room and the excitation room, reduce the false operation of the converter and the electrical equipment, reduce the failure damage rate of the equipment, and simultaneously reduce the cost of cooling and dust removal, thereby becoming a technical problem which needs to be solved urgently by each power plant in China.

Disclosure of Invention

In view of the above, the utility model aims at providing a device that has new trend, cooling, dust removal function that is exclusively used in between power plant's converter, excitation.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a special new trend cooling dust collector between excitation of power plant's converter which characterized in that: the device consists of a shell, and a waveform liquid-gas separation unit, a self-cleaning dust removal unit, an enthalpy reduction-depth dehydration unit, a secondary pressurization unit and a demagnetization unit which are arranged in the shell in sequence from an air inlet;

the air with lower outdoor temperature is subjected to preliminary dehydration and large particle dust removal by the waveform liquid-gas separation unit, is further dedusted by the self-cleaning dedusting unit, and is conveyed to the enthalpy-reducing deep dehydration unit; after the secondary temperature reduction and dehydration of the enthalpy reduction-deep dehydration unit, conveying the product to the secondary pressurizing unit; the secondary pressurizing unit pressurizes the magnetic particles and then conveys the magnetic particles to the demagnetizing unit; after being demagnetized by the demagnetizing unit, the air is conveyed to the space between the frequency converters and the excitation room through the air supplementing air channel, and is discharged to the outside after exchanging heat with high-temperature air in the space between the frequency converters and the excitation room.

In the preferred embodiment of the present invention, the corrugated liquid-gas separation unit is composed of a fixed support frame and a plurality of multi-fold corrugated plates; the fixed support frame is fixed at the air inlet of the shell, a plurality of multi-fold corrugated plates are fixed on the fixed support frame at intervals along the air flowing direction, and the multi-fold corrugated plates arranged at intervals form a plurality of independent air channels.

In a preferred embodiment of the present invention, the demagnetizing unit comprises a stainless steel shell and at least 9 magnetic rods; the magnetic rods are divided into at least two rows and fixed in the shell in a staggered mode.

In a preferred embodiment of the present invention, the self-cleaning dust removal unit comprises a filter cotton, a dust hood, a dust collector, a dust blowing fan and a dust blowing fan head; the filter cotton is fixed at the rear part of the waveform liquid-gas separation unit; the dust hood and the dust collector are fixed in front of the filter cotton; the dust blowing fan and the dust blowing fan head are fixed behind the filter cotton; the dust hood is connected with the dust collector through a hose, and can move up and down and left and right in front of the filter cotton under the drive of the mechanical arm; the dust blowing fan head is connected with the dust blowing fan through a hose, and moves up and down and left and right along the filter cotton through a mechanical arm; the dust hood and the dust blowing fan head synchronously and symmetrically operate in front of and behind the filter cotton.

In the preferred embodiment of the present invention, the enthalpy-reducing-deep dehydration unit includes an evaporator and a ventilation fan installed in the casing, a water collection tank fixed below the evaporator, and a compressor and a condenser installed outdoors.

In the preferred embodiment of the present invention, a plurality of water retaining grooves are respectively disposed on the side walls of the multi-fold corrugated plate facing the wind.

In the preferred embodiment of the present invention, the power plant frequency converter inter-excitation special fresh air cooling and dust removing device is characterized in that: the device also comprises a control box; a PLC programmable controller can be installed in the control box, a dust collector and a dust blowing fan in the self-cleaning type dust removal unit are automatically started at set time, and a mechanical arm for driving a dust collection cover and a head of the dust blowing fan to act is used for cleaning accumulated dust on the filter cotton at regular time.

In the preferred embodiment of the present invention, a temperature and humidity sensor is respectively arranged in the frequency converter or the excitation room and outside the frequency converter or the excitation room, and the signal output end of the temperature and humidity sensor is connected with the signal input end of the PLC; and a touch display screen is also arranged in the control box, and the signal input/output end of the touch display screen is respectively connected with the signal input/output end of the PLC.

Drawings

FIG. 1 is a schematic structural view of the special fresh air cooling and dedusting device for the excitation room between the frequency converters of the power plant of the utility model;

FIG. 2 is a side view D-D of FIG. 1;

FIG. 3 is a top view of a corrugated liquid-gas separation unit constituting the present invention;

FIG. 4 is a front view of a demagnetizing unit constituting the present invention;

FIG. 5 is a top view of FIG. 4;

fig. 6 is a schematic view of the installation structure of the present invention;

fig. 7 is a top view of fig. 6.

Detailed Description

The structure and features of the present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that various modifications can be made to the embodiments disclosed herein, and therefore, the embodiments disclosed in the specification should not be construed as limiting the present invention, but merely as exemplifications of embodiments thereof, which are intended to make the features of the present invention obvious.

The analysis is high temperature, deposition, the negative pressure phenomenon of ubiquitous between the internal each big power plant's converter and excitation, and its root cause is that the room air is not circulated, and in a relatively inclosed space, the heat that electrical components and electrical equipment produced can not in time distribute away, leads to vicious circle, indoor high temperature, deposition, negative pressure, so, the utility model discloses a design is exactly that carry to between the converter, in the excitation with outdoor microthermal air after removing dust, dehumidification, demagnetization, make between the converter, the interior air flow of excitation, distribute away as early as possible the heat that electrical components and electrical equipment produced.

Fig. 1 is the utility model discloses the structural schematic diagram, fig. 2 is the utility model discloses a side view, as fig. 1, fig. 2 show, the utility model discloses a be exclusively used in between the converter, the device that has new trend, cooling, dust removal function between excitation by casing 1, install in the casing, from air intake department according to the wave form liquid-gas separation unit 2 of installing according to the preface, self-cleaning formula dust removal unit 3, enthalpy drop-degree of depth dehydration unit 4, secondary pressurizing unit 5, demagnetization unit 6 constitute. The air with lower outdoor temperature is primarily dehydrated and removed of large-particle dust by the waveform liquid-air separation unit 2, and then is further dedusted by the self-cleaning dedusting unit 3 to form relatively dry, clean and low-temperature air which is conveyed to the enthalpy-reducing deep dehydration unit 4; after secondary drying and dust removal by the enthalpy-reducing deep dehydration unit 4, conveying the product to a secondary pressurization unit 5; the mixture is pressurized by a secondary pressurizing unit 5 and then is conveyed to a demagnetizing unit 6; the low-temperature air after repeated dust removal and dehydration is demagnetized by the demagnetizing unit 6, conveyed to the converter room and the excitation room through the air supplementing air duct 7, exchanges heat with the high-temperature air in the converter room and the excitation room, and is discharged out of the room. The utility model discloses just through to between the converter, the interior fresh, clean, dry, microthermal air of output between excitation, make between the converter, the air flow in the excitation to reduce between the converter, the temperature between excitation, solve the problem of its high temperature, deposition, negative pressure.

As shown in fig. 1 and 3, the wave-shaped liquid-gas separation unit 2 is installed at an air inlet of the casing 1, and is composed of a fixed support frame 21 and a plurality of multi-fold wave-shaped plates 22. The fixed support frame 21 is fixed at the air inlet of the shell 1, a plurality of multi-fold corrugated plates 22 are fixed on the fixed support frame 21 at intervals along the air flowing direction, and a plurality of water retaining grooves 23 are respectively arranged on the side walls of two sides of the multi-fold corrugated plates. Air containing dust and water drops enters the corrugated liquid-air separation unit 2 through the air inlet of the shell 1, dust particles and large-particle water drops 24 in the air are continuously blocked and separated by the multi-fold corrugated plate 22 in the process of flowing through the multi-fold corrugated plate 22, and low-temperature air is preliminarily purified to form dry and clean low-temperature air.

In the preferred embodiment of the present invention, the fixing support frame 21 has a height of 1600mm, a width of 800mm and a thickness of 255 mm. The multi-fold corrugated plate 22 is made of plastic materials, is 1400mm high, 200mm wide, 30mm thick and 15mm spaced, and is uniformly arranged in the fixed support frame 21 to form a plurality of independent air circulation channels so as to divide the entering air into a plurality of strands; and a plurality of water retaining grooves 23 are arranged on the windward side walls of the two side walls at the tail end of the multi-fold corrugated plate. When air containing large liquid water drops and dust particles flows through the waveform liquid-air separation unit at a certain wind speed, the liquid water drops collide at the bent parts of the multi-fold waveform plate 22 and form water films due to the inertia impact effect of the air, and the liquid drops are gathered at the bent parts in a large amount due to the increase of resistance and friction force to form settlement zones (each bent part forms the settlement zones). With the increasing content of liquid water in the settling zone, the liquid water surface is gathered into droplets of larger particles due to the diffusion of tension, the gravity of water droplets, the thrust of air flow and the like. When the liquid drops reach the condition that the gravity generated by the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid, the liquid drops can drop from the multi-fold corrugated plate. And the liquid water and dust particles which are not filtered flow to the next bending part and are collected and captured again in the same step. The multi-fold structure of the multi-fold corrugated plate increases the opportunity of collecting and catching liquid drops. The utility model discloses set up the high-efficient interception of liquid drop that the manger plate groove will remain at the terminal position of wave form liquid-gas separation unit, improved the dehumidification rate greatly.

The utility model discloses at first through dust particle, the large granule water droplet in the wave form liquid-gas separation unit 2 preliminary separation air, then, further get rid of the dust in the air through self-cleaning formula dust removal unit, form relatively clean, microthermal air. As shown in fig. 1, the self-cleaning dust removal unit includes an activated carbon fiber filter cotton (filter fineness 20 μm)31, a dust hood 32, a dust collector 33, a dust blower 34 and a dust blower head 35. The filter cotton 31 is fixed at the rear of the wave-shaped liquid-air separation unit 2, the dust hood 32 and the dust collector 33 are fixed at the front of the filter cotton 31, and the dust blower 34 and the dust blower head 35 are fixed at the rear of the filter cotton 31. When the air primarily dedusted and dehumidified by the waveform liquid-air separation unit 2 passes through the filter cotton 31, the filter cotton 31 further filters dust in the air, and secondarily dedustes the air, so that the low-temperature air after secondary dedusting is cleaner.

The utility model is provided with a dust hood 32 and a dust collector 33 in front of the filter cotton 31, the dust hood 32 is connected with the dust collector 33 through a hose, the dust hood 32 can move up and down and left and right in front of the filter cotton 31 under the drive of a mechanical arm; a dust blowing fan 34 and a dust blowing fan head 35 are arranged behind the filter cotton 31, the dust blowing fan head 35 is connected with the dust blowing fan 34 through a hose, and the dust blowing fan head 35 moves up and down and left and right along the filter cotton 31 through a mechanical arm. After the filter screen dust remover is used for a period of time, in order to remove dust adsorbed on the filter cotton 31, the dust blowing fan 34 and the dust collector 33 are started, the dust blowing fan 34 blows air in the reverse direction to the filter screen, the mechanical arm enables the dust blowing fan head 35 to move up, down, left and right along the filter cotton 31 to blow off dust on the outer surface of the filter screen, meanwhile, the mechanical arm enables the dust absorbing cover 32 to move up, down, left and right along the filter cotton 31 synchronously, the blown dust on the filter screen is sucked up and collected, and the filter cotton is kept permeable. When the dust on the filter cotton is removed, the dust suction cover and the dust blowing fan head are preferably synchronously and symmetrically operated in front of and behind the filter cotton so as to keep the synchronization of dust blowing and dust suction and achieve higher dust removal efficiency.

At least one enthalpy-reducing deep dehydration unit 4 is arranged at the rear part of the self-cleaning type dust removal unit, and secondary dehydration and temperature reduction treatment are carried out on the air subjected to secondary dust removal by the self-cleaning type dust removal unit 3. The utility model discloses fall enthalpy-degree of depth dehydration unit adopts compressor unit freezing treatment process, further dewaters, cools down through the low temperature freezing to the wet and hot air of the relative microthermal that removes dust through the secondary. As shown in fig. 1, the enthalpy-reducing deep water removing unit includes an evaporator and a ventilating fan 41 installed in a casing, a sump 42 fixed below the evaporator, and a compressor and a condenser 43 installed outdoors. The outdoor air treated by the waveform liquid-gas separation unit 2 and the self-cleaning type dust removal unit 3 is deeply cooled by an evaporator in a shell of the enthalpy-reducing deep dehydration unit 4, so that the specific enthalpy value of the air is reduced, and meanwhile, the residual moisture in the air is further condensed and separated, thereby achieving the purposes of secondary water filtering, dehydration and dehumidification.

A secondary pressurizing unit 5 and a demagnetizing unit 6 are sequentially arranged behind the enthalpy-reducing deep dehydration unit. The secondary pressurizing unit 5 comprises a high-power air supply fan, and after the dry and clean fresh air subjected to secondary dust removal, dehumidification and temperature reduction treatment passes through the secondary pressurizing unit 5, the air subjected to enthalpy reduction and dehydration becomes dry and clean fresh air which is subjected to secondary pressurization through the high-power air supply fan, so that the fresh air has certain pressure and flow and then enters the demagnetizing unit 6.

At large-scale industrial and mining enterprise, some iron fillings, powder or charged particles that contain magnetic substance can appear unavoidably in the surrounding environment, and these materials in case get into indoorly, can cause certain harm to indoor electrical equipment, converter etc. so, the utility model discloses still include a demagnetization unit 6, to after fresh drying, the clean air of removing dust through the secondary, dehydration, cooling carry to the converter again, between the excitation to improve equipment's operating safety factor. As shown in fig. 4 and 5, the demagnetizing unit 6 includes a stainless steel casing 61, and at least 9 magnetic rods 62, and the magnetic rods 62 are divided into at least two rows and fixed in the stainless steel casing 61 in a staggered manner. The air passing through the secondary pressurizing unit 5 enters the demagnetizing unit casing 61, when the air passes through the magnetic bar 62, the magnetic particles in the air are adsorbed by the magnetic bar 62, the dry and clean air after the secondary dedusting, dehumidifying and cooling treatment is further demagnetized, and the high-quality clean, dry and low-temperature air after the treatment enters the frequency converter room and the excitation room through the air supplementing air duct 7.

The magnetic rod 62 may be a permanent magnetic rod or an iron rod, and both ends of the iron rod are powered on to generate a magnetic field after being powered on.

As shown in fig. 6 and 7, the utility model discloses be exclusively used in between the converter of power plant, the new trend cooling dust collector 8 between excitation and install between the converter of power plant or between excitation 9 outside, the utility model discloses a mend wind channel 7 to converter or between excitation 9 input dry, clean, low temperature, mobile air, the heat that interior converter 91 gived off carries out the heat exchange with the low temperature air of input between the converter, and the hot-air after the exchange is outdoor through the 10 output in heat dissipation wind channel.

The utility model discloses can the self-cleaning formula dust removal unit of manual control and fall enthalpy-degree of depth dehydration unit, also can be through its work of control box 11 (see fig. 2) automatic control. A PLC programmable controller can be arranged in the control box, a dust collector 33 and a dust blowing fan 34 in the self-cleaning type dust removal unit are automatically started at set time, and a mechanical arm for driving the dust collection cover 32 and the dust blowing fan head 35 to act is driven to clean accumulated dust on filter cotton regularly. In addition, as shown in fig. 2, fig. 6 and fig. 7, the utility model discloses can also respectively set up a temperature and humidity sensor 44 between the converter, in the excitation room indoor, outside, detect indoor outer temperature difference, humidity difference, the evaporimeter operating duration and the rotational speed among the automatic start, the speed governing enthalpy drop-degree of depth dehydration unit, enthalpy drop, dehydration. A touch display screen can be arranged in the control box to display the temperature and humidity conditions in the frequency converter room and the excitation room in real time, manually set and adjust the indoor temperature and humidity, control the operation of the enthalpy reduction-depth dehydration unit and adjust the air supply quantity of the secondary pressurization unit 5. For example, when the indoor temperature between the frequency converters is less than 25 ℃, the small air volume of the air supplementing fan of the secondary pressurizing unit supplements fresh air to the frequency converters to maintain indoor positive pressure; when the temperature in the frequency converter room is more than or equal to 25 ℃, the large air quantity of the fan supplements strong air to the frequency converter room; when the temperature in the frequency converter room is more than or equal to 30 ℃, the large air volume of the fan replenishes low-temperature fresh air into the frequency converter room; when the humidity in the frequency converter room is more than or equal to 80%, the large air quantity of the fan supplements dry full wind to the frequency converter room.

Because the technical scheme of the utility model not only reduce the temperature between the converter, between excitation one by one, but remove dust, dehumidification, demagnetization, ventilation when the cooling, to between the converter, carry low temperature, clean, dry cold air between the excitation, make between the converter, be full of dry, clean, low temperature, malleation, mobile new trend in the excitation, fundamentally thoroughly solves between the converter, the excitation problem of high temperature, deposition, negative pressure. The utility model has the advantages of it is following: 1. the temperature between the frequency converters and the temperature in the excitation room are effectively reduced, the normal operation of the equipment is ensured, the failure rate is reduced, and the service life of the equipment is prolonged. 2. And a large amount of capital and energy are saved for cooling and dedusting of the power plant. 3. The arrangement amount of the cables and the engineering construction amount are reduced. The utility model discloses the installation is simple, and every cooling dust collector only needs to dispose a small amount of three four-wire power one, greatly reduces the volume of arranging of cable, has alleviateed construction intensity of labour. 4. The operation and the maintenance are simple and convenient. The utility model discloses the maintenance work is limited to the filthy degree of observing the filter pulp, clears up the filter pulp, perhaps maintains and changes small-size electronic components. 5. The internal space between the frequency converters is saved. The utility model discloses an installation does not occupy the inner space volume between the converter, make full use of outdoor space and current condition reduce the wasting of resources, and the mounting means is swift simple.

The utility model discloses successful test in the improvement of a certain power plant in Anhui, do not install between the converter of power plant the utility model discloses previously, for the cooling in the indoor air conditioner of 10 power 12kW of having assembled altogether of converter, require comparatively harsher to operational environment because of the converter (equipment operation requires the temperature to be 0- +40 ℃ within range to 22 ℃ of left and right sides is good, humidity is no longer than 75%, dust concentration is less than normal environmental concentration), day power consumption is 2640kW/d, year power consumption is 803000kW (because of the long indefinite when shutting down, calculate according to operation 20h every day). When the air conditioner is adopted for cooling, hot air exhausted by the frequency converter cannot be sucked and cooled by the air conditioner completely, and hot air flows exist in the upper space of the frequency converter chamber. The frequency converter is energy-saving and electricity-saving equipment, and the power consumption cost of the frequency converter is far higher than the energy-saving cost of the frequency converter when the air conditioner is used for cooling. The installation the utility model discloses afterwards, cooling and energy-conserving effect are splendid. On one hand, the refrigeration pressure of the air conditioners in the frequency converter room is greatly relieved, the problem that the compressor runs for a long time to cause faults is avoided, on the other hand, the load of 10 existing air conditioners in the frequency converter room is completely released, and all the air conditioners are in a standby state at the current stage under the air temperature. According to the calculation of the 12kW refrigerating power of each air conditioner, only two 5.5kW air supplementing fans are needed at present, about 2000 degrees of electricity is saved every day, and in addition, the air conditioners are saved, including about 5 ten thousand yuan per year of maintenance purchase cost such as replacement of a compressor, an oil-gas separator and fluorine addition, so that after the technical customs is completed, the annual electricity cost and maintenance cost are saved by about 20 ten thousand yuan, and the effects of energy conservation and consumption reduction are remarkable.

Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (8)

1. The utility model provides a special new trend cooling dust collector between excitation of power plant's converter which characterized in that: the device consists of a shell, and a waveform liquid-gas separation unit, a self-cleaning dust removal unit, an enthalpy reduction-depth dehydration unit, a secondary pressurization unit and a demagnetization unit which are arranged in the shell in sequence from an air inlet;

the air with lower outdoor temperature is subjected to preliminary dehydration and large particle dust removal by the waveform liquid-gas separation unit, is further dedusted by the self-cleaning dedusting unit, and is conveyed to the enthalpy-reducing deep dehydration unit; after the secondary temperature reduction and dehydration of the enthalpy reduction-deep dehydration unit, conveying the product to the secondary pressurizing unit; the secondary pressurizing unit pressurizes the magnetic particles and then conveys the magnetic particles to the demagnetizing unit; after being demagnetized by the demagnetizing unit, the air is conveyed to the space between the frequency converters and the excitation room through the air supplementing air channel, and is discharged to the outside after exchanging heat with high-temperature air in the space between the frequency converters and the excitation room.

2. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 1, characterized in that: the wave-shaped liquid-gas separation unit consists of a fixed support frame and a plurality of multi-fold wave-shaped plates;

the fixed support frame is fixed at the air inlet of the shell, a plurality of multi-fold corrugated plates are fixed on the fixed support frame at intervals along the air flowing direction, and the multi-fold corrugated plates arranged at intervals form a plurality of independent air channels.

3. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 2, characterized in that: the demagnetizing unit comprises a stainless steel shell and at least 9 magnetic rods; the magnetic rods are divided into at least two rows and fixed in the shell in a staggered mode.

4. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 3, characterized in that: the self-cleaning type dust removal unit comprises filter cotton, a dust hood, a dust collector, a dust blowing fan and a dust blowing fan head;

the filter cotton is fixed at the rear part of the waveform liquid-gas separation unit;

the dust hood and the dust collector are fixed in front of the filter cotton; the dust blowing fan and the dust blowing fan head are fixed behind the filter cotton;

the dust hood is connected with the dust collector through a hose, and can move up and down and left and right in front of the filter cotton under the drive of the mechanical arm; the dust blowing fan head is connected with the dust blowing fan through a hose, and moves up and down and left and right along the filter cotton through a mechanical arm;

the dust hood and the dust blowing fan head synchronously and symmetrically operate in front of and behind the filter cotton.

5. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 4, characterized in that: the enthalpy-reducing deep dehydration unit comprises an evaporator and a ventilation fan which are arranged in the shell, a water collecting tank fixed below the evaporator, and a compressor and a condenser which are arranged outdoors.

6. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 5, characterized in that: and a plurality of water retaining grooves are respectively arranged on the side walls of the two sides of the multi-fold corrugated plate facing the wind.

7. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 6, characterized in that: the device also comprises a control box;

a PLC programmable controller can be installed in the control box, a dust collector and a dust blowing fan in the self-cleaning type dust removal unit are automatically started at set time, and a mechanical arm for driving a dust collection cover and a head of the dust blowing fan to act is used for cleaning accumulated dust on the filter cotton at regular time.

8. The special fresh air cooling and dedusting device for the excitation room of the power plant frequency converter according to claim 7, characterized in that: a temperature and humidity sensor is respectively arranged in a frequency converter room or an excitation room and inside and outside the frequency converter room or the excitation room, and the signal output end of the temperature and humidity sensor is connected with the signal input end of the PLC;

and a touch display screen is also arranged in the control box, and the signal input/output end of the touch display screen is respectively connected with the signal input/output end of the PLC.

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