CN221825391U - Device for reducing air leakage of central cylinder of fluidized bed boiler separator - Google Patents

Abstract

The utility model discloses a device for reducing air leakage in the center tube of a fluidized bed boiler separator in the field of fluidized bed boiler insulation technology, comprising a separator, a separator insulation mechanism is installed in the middle of the outer surface of the separator, a center tube is arranged in the middle of the inner cavity of the separator, and a center tube sealing mechanism is fixedly connected to the outer surface of the center tube. By providing the separator insulation mechanism, it is convenient to effectively insulate the separator during use, reduce the amount of air entering the air preheater caused by air leakage, so that the exhaust gas temperature is too high and the load of the unit is limited. By providing the center tube sealing mechanism, it is convenient to seal the center tube and the separator during use, so as to reduce the influence of the air leakage of the center tube. By inserting a combining pin, it is convenient to effectively connect the high-temperature cast sealing layer with the center tube, so as to avoid falling off due to long-term use, thereby affecting the sealing effect.

Description

A device for reducing air leakage in the central tube of a fluidized bed boiler separator

Technical Field

The utility model relates to the technical field of fluidized bed boiler heat preservation, in particular to a device for reducing air leakage in a central tube of a separator of a fluidized bed boiler.

Background Art

The air leakage in the separator center tube of a fluidized bed boiler will affect the normal operation of the boiler, leading to problems such as increased fuel consumption, reduced thermal efficiency, and increased boiler temperature. Therefore, measures need to be taken to reduce the air leakage in the separator center tube.

As the boiler operating time increases, the separator center tube wears and deforms severely, and leaks seriously, resulting in severe air leakage, which causes the cyclone separator leakage to squeeze out the air entering the air preheater, increase the exhaust gas temperature, and limit the unit load. Therefore, it is necessary to provide a new device for reducing the leakage of the fluidized bed boiler separator center tube to solve the above technical problems.

Utility Model Content

The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

Therefore, the purpose of the utility model is to provide a device for reducing air leakage in the central tube of a fluidized bed boiler separator, which can solve the problem that the existing device leaks air after long-term use, resulting in excessive exhaust gas temperature and limited unit load. In order to solve the above technical problems, the utility model provides a device for reducing air leakage in the central tube of a fluidized bed boiler separator, which adopts the following technical solution: A device for reducing air leakage in the central tube of a fluidized bed boiler separator, comprising:

A separator, wherein a separator heat preservation mechanism is installed in the middle of the outer surface of the separator, a center tube is arranged in the middle of the inner cavity of the separator, and a center tube sealing mechanism is fixedly connected to the outer surface of the center tube.

By adopting the above technical solution and providing a separator insulation mechanism, it is convenient to effectively insulate the separator during use, reduce the amount of air entering the air preheater due to air leakage, so that the exhaust gas temperature is too high and the unit load is limited. By providing a center tube sealing mechanism, it is convenient to seal the center tube and the separator during use, thereby reducing the impact of center tube leakage.

Optionally, the bottom outer surface of the separator is sleeved with a thermal insulation sleeve.

By adopting the above technical solution, the outer surface of the bottom of the separator is sleeved with a heat-insulating sleeve, so that the separator can be kept warm during use.

Optionally, the separator insulation mechanism includes a steel plate installed on the separator, the steel plate and the separator are installed by welding, the outer surface of the steel plate is sleeved with a skin, and the outer surface of the steel plate is installed with pressure strips at the upper and lower ends, and the outer surface of the pressure strip is evenly inserted with multiple groups of fixing bolts.

By adopting the above technical scheme, a steel plate is provided to seal the separator connection groove, and thermal insulation cotton and a skin are provided to effectively insulate the separator during use, thereby reducing the amount of air entering the air preheater due to leakage, thereby limiting the load of the unit due to excessive exhaust gas temperature, and fixing bolts and pressure strips are provided to fix the skin to the steel plate during installation to prevent the skin from falling off, thereby affecting use.

Optionally, the surface of the fixing bolt is provided with threads, the pressure strip and the steel plate are provided with thread grooves matching the threads, and the fixing bolt, the pressure strip and the steel plate form a rotating connection mechanism.

By adopting the above technical solution, a rotating connection mechanism is formed by fixing bolts, pressure strips and steel plates, which makes it easy to fix the skin to the steel plate after installation, thereby improving the effectiveness of thermal insulation of the device.

Optionally, a filling groove is opened in the inner cavity of the steel plate, and the inner cavity of the steel plate is filled with thermal insulation cotton.

By adopting the above technical solution, the inner cavity of the steel plate is filled with thermal insulation cotton, which is convenient for protecting the thermal insulation cotton and thus keeping it warm in the long term.

Optionally, the center tube sealing mechanism includes a fixed plate fixedly connected to the center tube, and the outer surface of the fixed plate is fixedly connected to the separator, an elastic fiber sealing layer is arranged on the upper end of the fixed plate, a high-temperature resistant cast sealing layer is cast on the upper end of the elastic fiber sealing layer, a plurality of groups of combining pins are inserted on the inner side of the high-temperature resistant cast sealing layer, and the bottom of the combining pins is inserted on the center tube.

By adopting the above technical scheme, a fixing plate is provided to facilitate the connection between the center tube and the separator. The elastic fiber sealing layer and the high-temperature resistant cast sealing layer are used. The high-temperature cast sealing layer is made of high-temperature corrosion-resistant material and can withstand high temperature, high pressure, corrosion and other adverse conditions. It ensures sealing when used in a high-temperature environment, thereby improving the effectiveness of the sealing of the device. By inserting a combining pin, the high-temperature cast sealing layer and the center tube are effectively connected to avoid falling off due to long-term use, thereby affecting the sealing effect.

Optionally, the elastic fiber sealing layer is a ceramic elastic fiber sealing layer.

By adopting the above technical solution, the ceramic elastic fiber sealing layer is resistant to high temperature, high elasticity, shock resistance and erosion resistance, so it can be used in high temperature environment. The high elasticity and shock resistance can avoid falling off due to vibration during use, thereby affecting the sealing effect.

In summary, the present invention has at least one of the following beneficial effects:

1. The present application is provided with a separator insulation mechanism, and the separator connection groove is sealed by a steel plate. The insulation cotton and the skin are provided, so that the separator can be effectively insulated during use, and the amount of air entering the air preheater caused by air leakage is reduced, so that the exhaust gas temperature is too high and the load of the unit is limited. The fixing bolts and the pressure strips are provided, so that the skin and the steel plate can be fixed during the installation process to prevent the skin from falling off, thereby affecting the use;

2. By providing a center tube sealing mechanism and a fixing plate, it is convenient to connect the center tube with the separator. The elastic fiber sealing layer adopts a ceramic elastic fiber sealing layer. The ceramic elastic fiber sealing layer is resistant to high temperature, high elasticity, shock resistance and erosion resistance, so it is convenient to use it in a high temperature environment. The high elasticity and shock resistance can avoid falling off due to vibration during use, thereby affecting the sealing effect. The high temperature resistant cast sealing layer is provided, and the high temperature cast sealing layer is made of high temperature corrosion-resistant material, which can withstand high temperature, high pressure, corrosion and other adverse conditions, ensuring sealing use in a high temperature environment, thereby improving the effectiveness of the sealing of the device. By inserting a combining pin, the high temperature cast sealing layer is convenient to be effectively connected with the center tube, avoiding falling off due to long-term use, thereby affecting the sealing effect.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the utility model in use;

Figure 2 is a second schematic diagram of the utility model in use;

Figure 3 is a schematic diagram of the structure of the heat preservation mechanism of the separator of the utility model;

FIG. 4 is a schematic diagram of the structure of the central tube sealing mechanism of the utility model.

Explanation of the reference numerals: 1. separator; 2. insulation sleeve; 3. separator insulation mechanism; 301. steel plate; 302. pressure strip; 303. fixing bolt; 304. insulation cotton; 305. skin; 4. center tube; 5. center tube sealing mechanism; 501. fixing plate; 502. elastic fiber sealing layer; 503. high temperature resistant casting sealing layer; 504. combining pin.

DETAILED DESCRIPTION

The utility model is further described in detail below in conjunction with Figures 1-4.

Embodiment 1, referring to FIG. 2 and FIG. 3, the utility model discloses a device for reducing air leakage in the center tube of a fluidized bed boiler separator, which can solve the problem of heat preservation of the separator by reducing air leakage in the center tube of a fluidized bed boiler separator, including:

A separator 1, a separator insulation mechanism 3 is installed in the middle of the outer surface of the separator 1, a center tube 4 is arranged in the middle of the inner cavity of the separator 1, a center tube sealing mechanism 5 is fixedly connected to the outer surface of the center tube 4, an insulation sleeve 2 is sleeved on the bottom outer surface of the separator 1, the separator insulation mechanism 3 comprises a steel plate 301 installed on the separator 1, the steel plate 301 and the separator 1 are installed by welding, a skin 305 is sleeved on the outer surface of the steel plate 301, a pressure strip 302 is installed at the upper and lower ends of the outer surface of the steel plate 301, a plurality of groups of fixing bolts 303 are evenly inserted on the outer surface of the pressure strip 302, a thread is provided on the surface of the fixing bolt 303, a thread groove matching the thread is provided on the pressure strip 302 and the steel plate 301, the fixing bolt 303, the pressure strip 302 and the steel plate 301 form a rotating connection mechanism, a filling groove is provided in the inner cavity of the steel plate 301, and the inner cavity of the steel plate 301 is filled with insulation cotton 304.

Working principle: separator 1 separates fuel and ash to ensure the normal operation of the boiler. The separator insulation mechanism 3 is convenient for effectively insulating the separator 1 during use. The central tube 4 separates granular materials to ensure the normal operation of the boiler. The central tube sealing mechanism 5 is convenient for sealing the central tube 4 and the separator 1 during use, thereby reducing the impact of air leakage in the central tube 4. When in use, after the inner cavity of the steel plate 301 is filled with insulation cotton 304, the skin 305 is wrapped around the outer surface of the steel plate 301. The insulation cotton 304 and the skin 305 are provided to effectively insulate the separator 1 during use, reduce the amount of air entering the air preheater caused by air leakage, so that the exhaust gas temperature is too high and the unit load is limited. After the pressure strip 302 is installed, it is fixed by the fixing bolts 303, so that the skin 305 and the steel plate 301 can be fixed during the installation process to prevent the skin 305 from falling off, thereby affecting the use.

Embodiment 2, referring to Figure 1 and Figure 4, in this embodiment, the problem of sealing the center tube of the device is solved. The device for reducing air leakage of the center tube of the fluidized bed boiler separator also includes a center tube sealing mechanism 5 including a fixed plate 501 fixedly connected to the center tube 4, and the outer surface of the fixed plate 501 is fixedly connected to the separator 1, and an elastic fiber sealing layer 502 is arranged on the upper end of the fixed plate 501, and a high-temperature resistant cast sealing layer 503 is cast on the upper end of the elastic fiber sealing layer 502, and a plurality of groups of combining pins 504 are inserted on the inner side of the high-temperature resistant cast sealing layer 503, and the bottom of the combining pins 504 is inserted on the center tube 4, and the elastic fiber sealing layer 502 adopts a ceramic elastic fiber sealing layer.

Working principle: During installation, an elastic fiber sealing layer 502 is placed on the upper surface of the fixed plate 501. The elastic fiber sealing layer 502 adopts a ceramic elastic fiber sealing layer. The ceramic elastic fiber sealing layer is resistant to high temperature, high elasticity, shock resistance and erosion resistance, so it is convenient to use in a high temperature environment. The high elasticity and shock resistance can prevent it from falling off due to vibration during use, thereby affecting the sealing effect. After installation, the combining pin 504 is inserted into the central tube 4, and then the high temperature resistant cast sealing layer 503 is cast. The high temperature resistant cast sealing layer 503 is made of high temperature corrosion resistant material, which can withstand high temperature, high pressure, corrosion and other adverse conditions, ensuring sealed use in a high temperature environment, thereby improving the effectiveness of the sealing of the device. The combining pin 504 is inserted to facilitate the effective connection between the high temperature resistant cast sealing layer 503 and the central tube 4, thereby preventing it from falling off due to long-term use, thereby affecting the sealing effect.

The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. A device for reducing air leakage in the central tube of a fluidized bed boiler separator, characterized in that it comprises: A separator (1), wherein a separator heat preservation mechanism (3) is installed in the middle of the outer surface of the separator (1), a center tube (4) is arranged in the middle of the inner cavity of the separator (1), and a center tube sealing mechanism (5) is fixedly connected to the outer surface of the center tube (4). 2. A device for reducing air leakage in the central tube of a fluidized bed boiler separator according to claim 1, characterized in that a heat-insulating sleeve (2) is sleeved on the outer surface of the bottom of the separator (1). 3. A device for reducing air leakage in the central tube of a fluidized bed boiler separator according to claim 1, characterized in that: the separator insulation mechanism (3) includes a steel plate (301) installed on the separator (1), the steel plate (301) and the separator (1) are installed by welding, the outer surface of the steel plate (301) is sleeved with a skin (305), and the outer surface of the steel plate (301) is installed with pressure strips (302) at the upper and lower ends, and the outer surface of the pressure strip (302) is evenly inserted with multiple groups of fixing bolts (303). 4. A device for reducing air leakage in the central tube of a fluidized bed boiler separator according to claim 3, characterized in that: a thread is provided on the surface of the fixing bolt (303), the pressure strip (302) and the steel plate (301) are provided with thread grooves matching the thread, and the fixing bolt (303), the pressure strip (302) and the steel plate (301) form a rotating connection mechanism. 5. A device for reducing air leakage in the central tube of a fluidized bed boiler separator according to claim 3, characterized in that a filling groove is provided in the inner cavity of the steel plate (301), and the inner cavity of the steel plate (301) is filled with thermal insulation cotton (304). 6. A device for reducing air leakage in the central tube of a fluidized bed boiler separator according to claim 1, characterized in that: the central tube sealing mechanism (5) includes a fixed plate (501) fixedly connected to the central tube (4), and the outer surface of the fixed plate (501) is fixedly connected to the separator (1), an elastic fiber sealing layer (502) is arranged on the upper end of the fixed plate (501), a high-temperature resistant cast sealing layer (503) is cast on the upper end of the elastic fiber sealing layer (502), a plurality of groups of combining pins (504) are inserted on the inner side of the high-temperature resistant cast sealing layer (503), and the bottom of the combining pins (504) is inserted on the central tube (4). 7. A device for reducing air leakage in the central tube of a fluidized bed boiler separator according to claim 6, characterized in that the elastic fiber sealing layer (502) is a ceramic elastic fiber sealing layer.