CN214582532U

CN214582532U - Bypass air-bleeding cooling system

Info

Publication number: CN214582532U
Application number: CN202120451849.6U
Authority: CN
Inventors: 李传永; 林东; 李玮琪; 方明玉
Original assignee: Mikaili Technology Beijing Co ltd
Current assignee: Mikaili Technology Beijing Co ltd
Priority date: 2021-03-02
Filing date: 2021-03-02
Publication date: 2021-11-02
Anticipated expiration: 2031-03-02

Abstract

The application discloses bypass cooling system that leaks informaton relates to cement kiln. Bypass cooling system that lets out carries out the rapid cooling for the hot flue gas that cement kiln produced, includes: fan, cold air duct, quench chamber and induced duct. The inner wall of the cold air pipeline is provided with a nozzle for spraying fog drops so that cold air and the fog drops are mixed into cold air with the fog drops. The quenching chamber is a double-layer pipe and comprises an inner pipe and an outer pipe, the inner pipe is provided with an inner pipe extension section, the outer pipe is provided with an outer pipe extension section, and the outer pipe extension section is communicated with the smoke chamber. The induced draft pipe is connected with the inner pipe and the humidifying tower. Through installing the nozzle in the cold air duct, when mixing cold wind, spray, can use the water-cooling, reduce the volume of mixing of cold wind to can reduce the power of dust collector, fan, and then reduce on-the-spot area, reduce equipment cost. Through the design of the quenching chamber, the probability of system skinning is reduced.

Description

Bypass air-bleeding cooling system

Technical Field

The present application relates to cement kilns, and more particularly, to a bypass vent cooling system for a cement kiln.

Background

The cement kiln is mainly used for calcining cement clinker and comprises a dry-process cement kiln and a wet-process cement kiln.

At present, hot flue gas generated by the cement kiln is quenched through a bypass air discharging device. The existing bypass air discharging device adopts a mode of doping cold air in proportion to carry out sharp cooling on hot flue gas. The bypass air discharge system comprises an air mixing pipe, a fan, a dust collector and an induced draft pipe. Mix the tuber pipe and link to each other with the delivery pipe of hot flue gas, the induced duct links to each other with mixing the tuber pipe. Due to the structural limitation of the bypass air release system, the hot flue gas has the following problems in the quenching process:

firstly, a large amount of cold air needs to be doped, and the loads of a dust collector and a fan of a bypass air release system are increased, so that the problems of large occupied area and high equipment cost are caused due to the need of the high-power dust collector and the high-power fan;

secondly, the occurrence of skin formation and the like is likely to occur.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to overcome the above problems or to at least partially solve or mitigate the above problems.

The application provides a bypass cooling system that leaks informaton carries out the rapid cooling for the hot flue gas that cement kiln produced, includes:

the fan is used for providing cold air;

the cold air pipeline is connected with the fan and used for passing cold air, and a nozzle is arranged on the inner wall of the cold air pipeline and used for spraying fog drops so that the cold air and the fog drops are mixed into cold air with the fog drops;

the rapid cooling chamber is a double-layer tube and comprises an inner tube and an outer tube, one end of the inner tube extends outwards beyond the outer tube to form an inner tube extension section, the end, opposite to the inner tube extension end, of the outer tube extends outwards beyond the inner tube to form an outer tube extension section, a through hole is formed in the outer tube and used for receiving cold air with fog drops, and the outer tube extension section is communicated with the smoke chamber; and

one end of the induced draft tube is communicated with the inner tube extension section of the quenching chamber, and the other end of the induced draft tube is communicated with the humidifying tower;

and because the absolute pressure of the quenching chamber is less than the absolute pressure of the smoke chamber, cold air with fog drops and hot smoke are sucked into the quenching chamber to be mixed under the action of pressure difference, and the smoke after quenching passes through the inner pipe and then passes through the induced draft pipe to the humidifying tower.

Optionally, a loop is arranged in the cold air duct, and the nozzle is installed at the loop.

Optionally, the nozzle is a fine mist nozzle, and the diameter of the ejected mist is less than 50 μm.

Optionally, a nozzle is arranged in the induced duct for spraying the mist droplets.

Optionally, the bypass air-bleeding cooling system further comprises an automatic blockage removing device, which is arranged at the inner pipe extension section of the quenching chamber and is used for removing blockage of the inner pipe.

Optionally, the automatic blockage removing device is an electric cylinder.

Optionally, the bypass air-bleeding cooling system further includes a PLC controller configured to control the automatic blockage removing device to remove blockage at regular time.

The utility model provides a bypass cooling system that leaks informaton through installing the nozzle in the cold wind pipeline, when mixing cold wind, sprays, can use the water-cooling, reduces the volume of mixing of cold wind to can reduce the power of dust collector, fan, and then reduce on-the-spot area, reduce equipment cost.

Further, the design of this application through the rapid cooling room, cold wind flows to smoke chamber and rapid cooling room juncture A department along the outer tube of rapid cooling room, because the absolute pressure of rapid cooling room is less than the absolute pressure of smoke chamber, will form the negative pressure at this moment, inhales the inner tube of rapid cooling room with cold wind and hot flue gas here and mixes. The cold air flows into the interface from the outer pipe of the quenching chamber, so when the mixed air is sucked into the inner pipe of the quenching chamber, the cold air can wrap the hot smoke from the smoke chamber. Therefore, the phenomena of skinning and blocking caused by adhesion when molten salt in the flue gas meets the inner wall of the inner pipe of the quenching chamber can be prevented, and the probability of skinning of the system is reduced.

Further, this application leads to automatic clear stifled device, the inside crust that causes of automatic clearance system, jam.

The above and other objects, advantages and features of the present application will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present application will be described in detail hereinafter by way of illustration and not limitation with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

FIG. 1 is a schematic block diagram of a bypass bleed cooling system according to one embodiment of the present application;

FIG. 2 is a schematic enlarged partial view of the quench chamber shown in FIG. 1.

1 smoke chamber, 2 humidifying tower, 3 spiral conveyer,

100 by-pass the bleed air cooling system,

10 a blower fan is arranged on the upper portion of the air conditioner,

20, a cold air pipeline,

30 quenching chamber, 31 inner tube, 32 outer tube, 33 through hole,

40 of an air guide pipe, and a heat-insulating pipe,

50 an automatic blockage clearing device is arranged on the device,

the interface of the smoke chamber A and the quenching chamber.

Detailed Description

FIG. 1 is a schematic block diagram of a bypass bleed cooling system according to one embodiment of the present application. FIG. 2 is a schematic enlarged partial view of the quench chamber shown in FIG. 1. As shown in fig. 1, the present embodiment provides a bypass air-bleeding cooling system 100 for performing rapid cooling and cooling on hot flue gas generated by a cement kiln, wherein the cement kiln has a flue gas chamber 1. The bypass bleed cooling system 100 may generally include: fan 10, cold air duct 20, quench chamber 30 and draft tube 40. The blower 10 is used to provide cool air. The cold air duct 20 is connected to the blower 10 for passing cold air therethrough. The inner wall of the cold air pipeline 20 is provided with a nozzle for spraying fog drops, so that cold air and the fog drops are mixed to form cold air with the fog drops. The quenching chamber 30 is a double-layer tube including an inner tube 31 and an outer tube 32. One end of the inner tube 31 extends beyond the outer tube 32 as an inner tube extension, and the right end of the inner tube 31 in fig. 1 is the inner tube extension. The end of the outer tube 32 opposite to the inner tube extension extends beyond the inner tube 31 as an outer tube extension, and the left end of the outer tube 32 in fig. 1 is an outer tube extension. The outer tube 32 is provided with a through opening 33 for receiving cold air with droplets. The outer tube extension communicates with the smoke chamber 1. One end of the induced draft tube 40 is communicated with the inner tube extension section of the quenching chamber 30, and the other end of the induced draft tube 40 is communicated with the humidifying tower 2. Because the absolute pressure of the quenching chamber 30 is less than the absolute pressure of the smoke chamber 1, the cold air with fog drops and the hot smoke are sucked into the quenching chamber 30 to be mixed under the action of the pressure difference, and the smoke after quenching passes through the inner pipe 31 and then passes through the induced duct 40 to the humidifying tower 2.

In this embodiment, the fan 10 generates cold air to blow into the cold air duct 20, and when the cold air passes through the nozzle of the cold air duct 20, the fog drops sprayed from the nozzle enter the outer tube 32 of the quenching chamber 30 along with the cold air to cool the quenching chamber 30. The cool air then flows along the outer tube 32 of the quench chamber 30 to the interface A of the flue chamber and the quench chamber. Because the absolute pressure of the quenching chamber is less than the absolute pressure of the smoke chamber 1, negative pressure is formed at this moment, and cold air and hot smoke are sucked into the quenching chamber 1 to be mixed. The cool air flows from the outer tube 32 of the quenching chamber into the interface A between the flue gas chamber and the quenching chamber, so that the cool air entrains the hot flue gas from the flue gas chamber 1 when the mixed air is sucked into the quenching chamber 30. Thereby preventing the phenomena of skinning and blocking caused by the adhesion of molten salt in the flue gas when the molten salt meets the inner wall of the quenching chamber 30. The flue gas after rapid cooling enters the humidifying tower 2 through the induced draft pipe 40 to spray water for cooling, and because the flue gas direction is from top to bottom, part of dust in the flue gas can be settled in the water spraying process, and is finally accumulated at the bottom of the humidifying tower 2. The bottom of the kiln dust conveying device is provided with a kiln dust conveying pipeline which is conveyed to a conveying bin through a screw conveyor 3 for storage.

The bypass air-bleeding cooling system 100 is provided with the nozzle in the cold air pipeline 20, and when cold air is mixed, the cold air is sprayed, so that the cold air can be cooled by using water, the mixing amount of the cold air is reduced, the power of the dust collector and the fan 10 can be reduced, the occupied area on the site is reduced, and the equipment cost is reduced.

Further, the present application reduces the probability of system skinning through the design of the quench chamber 30.

In specific implementation, a loop is arranged in the cold air duct 20, and the nozzles are installed at the loop. Furthermore, the nozzle is a micro-mist nozzle, and the diameter of the sprayed mist is less than 50 μm, so as to better cool the quenching chamber 30.

More specifically, a nozzle is arranged in the induced draft tube 40 and used for spraying droplets to further reduce the temperature of the flue gas.

Further, the bypass air-bleeding cooling system 100 further includes an automatic blockage clearing device 50, which is disposed at the inner tube extension section of the quenching chamber 30 and is used for clearing the blockage of the inner tube 31, that is, automatically clearing the crusts and blockages caused by the interior of the bypass air-bleeding cooling system 100.

More specifically, the automatic blockage removing device 50 is an electric cylinder, but the automatic blockage removing device 50 may also be a hydraulic cylinder. The size of the cylinder of the corresponding electric cylinder or hydraulic cylinder is designed according to the size of the quenching chamber 30. The device moves through an electric cylinder or a hydraulic cylinder, so that the skinning and blocking can be automatically cleared.

More specifically, the bypass bleed air cooling system 100 further includes a PLC controller configured to control the automatic blockage removal device 50 to remove blockage at regular intervals.

Further, when the bypass air-bleeding cooling system 100 is stopped, the automatic blocking-clearing device 50 can be extended to the junction a of the smoke chamber and the quenching chamber to prevent hot smoke from entering, and meanwhile, the water spraying is stopped, and cold air cooling is kept to prevent the bypass air-bleeding cooling system 100 from being damaged due to overhigh temperature.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which this application belongs.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

The above description is only for the preferred embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a bypass cooling system that lets out wind, carries out the rapid cooling for the hot flue gas that cement kiln produced, its characterized in that includes:

the fan is used for providing cold air;

2. The bypass-bleed cooling system of claim 1, wherein a collar is disposed in the cold air duct, and wherein the nozzles are mounted at the collar.

3. The bypass bleed cooling system of claim 1, wherein the nozzles are fine mist nozzles, and wherein the ejected droplets have a diameter of less than 50 μm.

4. The bypass bleed cooling system of claim 1, wherein a nozzle is provided in the induced draft tube for spraying droplets of the mist.

5. The bypass ventilation cooling system according to any one of claims 1 to 4, further comprising an automatic blockage clearing device provided at the inner pipe extension of the quenching chamber for clearing blockage of the inner pipe.

6. The bypass bleed cooling system of claim 5, wherein the automatic blockage removal device is an electric cylinder.

7. The bypass bleed cooling system of claim 5, further comprising a PLC controller configured to control the automatic blockage removal device to remove blockages periodically.