CN213808219U - Cooling device for power station boiler fan - Google Patents

Abstract

The utility model discloses a cooling device for power plant boiler fan relates to power plant boiler fan cooling arrangement technical field. The utility model discloses a level is in to and the top is open-ended placing box and a setting place the outside and both sides of case for open-ended fan shell, place the incasement portion and be provided with the first framework that is used for depositing the coolant liquid and is used for depositing the second framework of running water that a level was placed, be provided with a water pump that is used for the pump sending coolant liquid in the first framework, first framework with install first pipeline just between the second framework first pipeline tip with the water pump goes out the liquid end intercommunication. The utility model discloses a design a first framework that is used for depositing the coolant liquid of intercommunication each other and the second framework that is used for depositing the running water and a cooling frame of fixing in the fan outside, through first pipeline and second pipeline with three cavity intercommunication, realized the coolant liquid at three cavity inner loop to reach the purpose that makes the fan continuously cool down.

Description

Cooling device for power station boiler fan

Technical Field

The utility model relates to a power station boiler fan cooling arrangement technical field especially relates to a cooling device for power station boiler fan.

Background

A boiler of a power station is a boiler for generating power in a power plant in popular terms. The general capacity is larger, the current main unit is 600MW, the current advanced is an ultra-supercritical boiler, and the capacity can reach 1000 MW. Utility boilers mainly have two types: pulverized coal furnaces and circulating fluidized bed boilers. These two types of boilers are the main types used in power stations today. The biggest difference between the fluidized bed furnace and the pulverized coal furnace is the state of the fuel, i.e., the liquid and the pulverized coal state.

Power plant fans can be classified into the following categories. The blower provides secondary air, and after passing through the air preheater, part of the secondary air provides peripheral air, sandwich air and the like to the combustor, so that the secondary air has influence on flame at the combustor and can cool the combustor. The other part provides the amount of oxygen required for boiler combustion. The last part is to provide SOFA and COFA wind to adjust the combustion; the primary air fan (taking a medium-speed coal mill, a direct-fired pulverizing system as an example) provides primary air, the primary air is divided into two paths from the fan, one path of primary air is called hot primary air after passing through an air preheater, and the other path of primary air is called cold primary air without passing through the air preheater. The hot primary air provides drying output and ventilation output for the coal mill, and pulverized coal ground by the coal mill is dried and then enters the boiler burner along with the pulverized coal. The cold primary air and the hot primary air are mixed at the inlet of the coal mill, so that the temperature of the inlet/outlet of the coal mill is adjusted, and the cold primary air and the hot primary air are part of the ventilation output of the coal mill; the induced draft fan is used for extracting the smoke of the boiler and maintaining the negative pressure of the boiler. The flue gas enters an induced draft fan after passing through an air preheater, namely electric precipitation, and the induced draft fan sends the flue gas into a desulfurization system or directly discharges the flue gas into a chimney; and the booster fan is characterized in that the air from the induced draft fan enters the booster fan on the one way and enters the chimney on the other way through a bypass. (the bypass is not allowed to be opened when the generator set normally operates, otherwise, the flue gas which is not subjected to desulfurization is not in environmental protection standard, and is allowed to be opened only when the desulfurization system has an accident); and (4) sealing the fan, wherein an air source is taken from a cold primary air pipeline. The sealing fan provides sealing air for the coal feeder and the coal mill, wherein the sealing air of the coal mill is divided into a grinding roller, a grinding bowl, a loading spring and the like; the dilution fan is used for denitration of the unit and provides air for a denitration system to dilute ammonia.

The draught fan of the existing power station boiler needs to take out the flue gas of the boiler for a long time, so that the draught fan is overheated, the failure rate of the draught fan is increased, the service life of the draught fan is shortened, and the cooling device of the power station boiler draught fan is designed to solve the problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: thereby lead to itself high temperature to shorten fan life's problem for solving the long-time operation of power plant boiler fan, the utility model provides a cooling device for power plant boiler fan.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

a cooling arrangement for a utility boiler fan, comprising: the fan casing is characterized in that the top of the fan casing is provided with a first frame body which is horizontally arranged and used for storing cooling liquid and a second frame body which is used for storing tap water, a water pump used for pumping the cooling liquid is arranged in the first frame body, a first pipeline and a first pipeline end portion are installed between the first frame body and the second frame body and communicated with a water outlet end of the water pump, the fan casing further comprises a cooling frame arranged on the fan casing, communicating pieces are symmetrically arranged on two sides of the opening direction of the fan casing along the cooling frame, and the communicating pieces are respectively communicated with the first pipeline and the second pipeline arranged on the first frame body and communicated with the first pipeline and the second frame body.

Furthermore, a water inlet pipe and a water outlet pipe which penetrate through the placing box and are close to one side of the second frame body are arranged on the outer side of the second frame body.

Furthermore, cooling frame quantity is two and the symmetry sets up the outside of fan shell, connect through a threaded rod between the cooling frame that the symmetry set up, the threaded rod is provided with one along its length direction bilateral symmetry and is used for locking the thread bush of threaded rod.

Further, one end of the communication piece, which is far away from the first pipeline and the second pipeline, is communicated with the two cooling frames.

Furthermore, a handle is symmetrically arranged outside the placing box.

Furthermore, the bottoms of the first frame body and the second frame body are respectively provided with a clamping piece, and the bottom of the placing box is provided with a clamping groove matched with the clamping pieces.

The utility model has the advantages as follows:

the utility model discloses a design a first framework that is used for depositing the coolant liquid of intercommunication each other and the second framework that is used for depositing the running water and a cooling frame of fixing in the fan outside, through first pipeline and second pipeline with three cavity intercommunication, realized the circulation of coolant liquid in three cavity to reach the purpose that makes the fan continuously cool down.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

fig. 2 is a top view of the present invention;

fig. 3 is a side view of the present invention;

fig. 4 is a front view of the present invention;

FIG. 5 is a top view of the structure of the present invention;

fig. 6 is a sectional view in the direction of a-a of the top view of the partial structure of the present invention.

Reference numerals: 1. placing a box; 11. a handle; 2. a fan housing; 3. a first frame body; 31. a water pump; 4. a second frame body; 41. a water inlet pipe; 42. a water outlet pipe; 5. a first conduit; 6. a cooling frame; 61. a communicating member; 62. a threaded rod; 621. a threaded sleeve; 7. a second conduit; 8. the fastener.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

As shown in FIG. 1, a cooling device for a fan of a utility boiler according to an embodiment of the present invention comprises a horizontally-oriented housing case 1 with an open top and a fan casing 2 disposed outside the housing case 1 and having two open sides, the housing case 1 is installed at a location around the fan, a horizontally-oriented first frame 3 for storing cooling liquid and a second frame 4 for storing tap water are disposed inside the housing case 1, a water pump 31 for pumping cooling liquid is disposed inside the first frame 3, a first pipe 5 is disposed between the first frame 3 and the second frame 4, an end of the first pipe 5 is connected to a liquid outlet of the water pump 31, and the cooling device further comprises a cooling frame 6 disposed on the fan casing 2, the cooling frame 6 is made of aluminum and has good thermal conductivity, the cooling frame 6 is symmetrically provided with connecting members 61 along two sides of the opening direction of the fan casing 2, the connecting pieces 61 are three-way valves, the two connecting pieces 61 are respectively communicated with the first pipeline 5 and the second pipeline 7 arranged on the first frame body 3, the first pipeline 5 is communicated with the second frame body 4, when in normal use, cooling liquid is pumped into the first pipeline 5 through the water pump 31, then the cooling liquid is conveyed into the cooling frame 6 through one of the connecting pieces 61, heat generated when the fan shell 2 works is absorbed and transferred to the cooling liquid through the cooling frame 6, so that the cooling effect on the fan is achieved, the placing box 1, the first frame body 3 and the top of the second frame body 4 are respectively provided with a detachable sealing cover, the temperature of the cooling liquid absorbing the heat of the fan is increased, when the cooling liquid flows through the second frame body 4, because the part of the first pipeline 5 positioned in the second frame body 4 is set to be in a reciprocating U-shaped structure and tap water for cooling the cooling liquid is arranged in the second frame body 4 (water can be changed through the water inlet pipe 41, tap water with increased temperature can be discharged through the water outlet pipe 42), the U-shaped structure can increase the time for the cooling liquid to pass through the second frame body 4, thereby reducing the temperature of the cooling liquid, and achieving the purpose of continuously cooling the fan by the cooling liquid.

As shown in fig. 1 and 3, a water inlet pipe 41 and a water outlet pipe 42 are disposed outside the second frame 4 and penetrate through the storage box 1 near the second frame 4, the water inlet pipe 41 is used for injecting tap water into the second frame 4 from the outside, and the water outlet pipe 42 is used for discharging tap water with increased temperature.

As shown in fig. 2, the number of the cooling frames 6 is two, the cooling frames 6 are symmetrically arranged outside the fan housing 2, the cooling frames 6 are configured into an arc shape and can be tightly attached to the fan, the symmetrically arranged cooling frames 6 are connected through a threaded rod 62, and the threaded rod 62 is symmetrically provided with a threaded sleeve 621 for locking the threaded rod 62 along both sides of the length direction of the threaded rod 62.

As shown in fig. 2, in some embodiments, the end of the communication member 61 remote from the first duct 5 and the second duct 7 communicates with the two cooling frames 6.

As shown in fig. 5, a handle 11 is symmetrically disposed outside the placing case 1 for easy movement and installation of the placing case 1.

As shown in fig. 1 and fig. 6, the bottom of each of the first frame 3 and the second frame 4 is provided with a clamping member 8, the bottom of the placing box 1 is configured with a clamping groove matched with the clamping member 8, and the first frame 3 and the second frame 4 can be stably placed in the clamping groove at the bottom of the placing box 1 through the clamping member 8 at the bottom.

Claims (6)

1. A cooling device for utility boiler fans, comprising: the horizontal type cooling box comprises a horizontal placing box (1) with an opening at the top, a fan shell (2) with openings at two sides and arranged outside the placing box (1), a first frame body (3) horizontally placed and used for storing cooling liquid and a second frame body (4) horizontally placed and used for storing tap water are arranged inside the placing box (1), a water pump (31) used for pumping the cooling liquid is arranged in the first frame body (3), a first pipeline (5) is arranged between the first frame body (3) and the second frame body (4), one end of the first pipeline (5) is communicated with the liquid outlet end of the water pump (31), the cooling box further comprises a cooling frame (6) arranged on the fan shell (2), communicating pieces (61) are symmetrically arranged at two sides of the opening direction of the fan shell (2), and the communicating pieces (61) are respectively communicated with the first pipeline (5) and the second pipeline (61) arranged on the first frame body (3) 7) And the first pipeline (5) is communicated with the second frame body (4).

2. A cooling arrangement for utility boiler fans according to claim 1, characterized in that outside the second frame (4) there is arranged a water inlet pipe (41) and a water outlet pipe (42) through the placing box (1) on the side close to the second frame (4).

3. The cooling arrangement for utility boiler fans according to claim 1, characterized in that the number of the cooling frames (6) is two and the cooling frames are symmetrically arranged outside the fan housing (2), the symmetrically arranged cooling frames (6) are connected by a threaded rod (62), the threaded rod (62) is symmetrically provided with a thread sleeve (621) for locking the threaded rod (62) along both sides of the length direction thereof.

4. A cooling arrangement for utility boiler fans according to claim 3, characterized in that the end of the communication piece (61) remote from the first duct (5) and the second duct (7) communicates with two cooling frames (6).

5. A cooling arrangement for utility boiler fans according to claim 1, characterized in that the outside of the placing box (1) is symmetrically provided with a handle (11).

6. The cooling device for utility boiler fans according to claim 1, characterized in that a clamping piece (8) is arranged at the bottom of each of the first frame body (3) and the second frame body (4), and a clamping groove matched with the clamping piece (8) is formed at the bottom of the placing box (1).

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