CN219414821U - Single-beam vibration ash removing device at bottom of heating surface of boiler - Google Patents

Abstract

The utility model provides a single-beam vibration ash removing device at the bottom of a heating surface of a boiler, which comprises an expansion joint and a vibration tube, wherein the expansion joint is arranged on the wall surface of the boiler and used for sealing and damping, the vibration tube penetrates through the expansion joint, a vibration plate which is in contact with the heating surface of the boiler is arranged on the vibration tube, the vibration device is arranged at the end part of the vibration tube, two sides of the end part of the vibration tube are provided with fixing frames, and the fixing frames are connected with the end part of the vibration tube and the vibration device is connected with the end part of the vibration tube through springs. The vibration amplitude of the vibration pipe penetrating through the wall surface of the boiler is beneficial to improving the sealing performance and reducing vibration when the vibration pipe is in vibration, the vibration pipe is exposed out of the end part of the boiler, the spring is further arranged, when the vibration pipe is in vibration, the rigid vibration of the vibration pipe caused by the vibration device can be effectively reduced, the vibration pipe is prevented from shifting in the vibration process, and the running stability is improved.

Description

Single-beam vibration ash removing device at bottom of heating surface of boiler

Technical Field

The utility model relates to a mechanical vibration device for removing opportunities on a heating surface of a boiler in a vibration mode, in particular to a single-beam vibration ash removing device at the bottom of the heating surface of the boiler.

Background

Oil shale has extremely large ash content, the temperature of flue gas of a convection heating surface is 550-700 ℃, the temperature of reheat steam is lower due to serious ash deposition, and the temperature of exhaust gas is too high, so that the heat absorption of the convection heating surface is reduced. It is a key to how to effectively and continuously remove the deposited ash on the heating surface, and the boiler can stably operate.

At present, there are three main ash removal modes: the first is that the mixed gas of acetylene and air is ignited in a mixing device by high frequency to explode in a pulse tank, the volume of the mixed gas expands sharply, the generated high-temperature high-speed air flow is sprayed into the tube screen area of the heating surface in the furnace through a tube and a nozzle, and the generated shock wave shakes and loosens the accumulated ash on the tube bundle of the heating surface, so as to remove the ash on the surface area of the tube bundle. The action process of the shock wave sprayed into the furnace at least comprises the vibration of impact, the blowing of air flow, the oscillation of sound waves and the like. The shock wave ash removing system consists of an acetylene supply and distribution system, a compressed air supply and distribution system, an ignition mixing system, a purging system, a monitoring control system and various pipelines. Because acetylene is inflammable and explosive gas, the acetylene pipeline is required to be provided with a corresponding backfire preventing device, and the system meets corresponding fireproof standards. The shock wave ash cleaning system is usually controlled by a PLC system program, and system parameters can be properly adjusted according to actual conditions and manufacturer specifications, and the system purging time, the circulation interval, the circulation times, the inflation time and the like are flexibly adjustable. The high-temperature shock wave has strong impact force, large blowing range and good blowing effect, but the tube bundle with the nozzle facing to each other needs to be additionally provided with the anti-abrasion tile to prevent the tube screen from being blown and hurt, and meanwhile, the shock wave has loud noise when in ash cleaning work, and inexperienced personnel are easily frightened. Secondly, steam soot blowing is carried out, namely superheated steam after decompression is sprayed into intervals of each stage of a tube panel of a heating surface by utilizing a telescopic steam soot blower, and the surface area ash of a tube bundle is removed by utilizing the blowing and impact of the steam. The steam ash removal mainly comprises a steam sound wave ash remover, a telescopic steam ash remover and a fixed rotary steam ash remover. Steam sootblowing systems typically consist of a steam supply and depressurization system, a sootblower system, a purge seal system, and a control system. The telescopic pipe is driven by the motor to advance deep into a soot blowing area in the furnace, the soot blowing pipe is provided with a spray head, the spray head is driven by the pipe to rotate while the soot blowing pipe is deep into the furnace, the purging area is increased by the aid of the spray head, the steam impact force is strong, the external purging pipe is deep into the furnace and rotates to purge, and therefore the purging range of steam soot blowing is large, and the purging effect is good. The steam purging needs to consume part of steam, takes away part of heat, needs to send steam and drain water firstly during operation, is relatively complex in operation, and easily causes jam and leakage of a steam system during telescopic movement of a purging gun barrel, and is relatively high in failure rate and relatively large in maintenance workload. The high-temperature steam is easy to blow and hurt the tube on the heating surface, and the tube bundle opposite to the nozzle needs to be additionally provided with an anti-abrasion tile to prevent the tube screen from being blown and hurt. Another disadvantage of steam blowing is that the steam may condense in local areas such as tube panels after cooling, exacerbating equipment corrosion, and the moisture content of the flue gas increases during steam blowing. In addition, soot blowing and drainage have the characteristic of discontinuity, and steam soot blowing and drainage losses are large. The mechanical vibration ash removing method has the working principle that a vibration plate closely contacted with a heating surface is periodically struck by a vibration pipe, so that the heating surface pipe group forms integral vibration, and vibration mechanical waves are transmitted to each geometric point along the axial direction of the heating surface pipe, thereby achieving the ash removing purpose; however, the mechanical vibration ash removing mechanism is still immature, and particularly has the following problems in high-temperature flue gas reaching about 700 ℃, such as damage to a heating surface due to mechanical rigid impact; the clamping phenomenon is easy to be caused by thermal expansion at high temperature; there are furnace wall seals and durability issues; the vibrating tube has the problems of vibration looseness prevention, vibration abrasion and the like at high temperature.

Disclosure of Invention

The utility model provides a single-beam vibration ash removal device at the bottom of a heating surface of a boiler, which has a simple structure and good ash removal effect.

The utility model discloses a single-beam vibration ash removing device at the bottom of a heating surface of a boiler, which comprises an expansion joint and a vibration tube, wherein the expansion joint is arranged on the wall surface of the boiler and used for sealing and damping, the vibration tube penetrates through the expansion joint, a vibration plate which is in contact with the heating surface of the boiler is arranged on the vibration tube, the vibration device is arranged at the end part of the vibration tube, two sides of the end part of the vibration tube are provided with fixing frames, and the fixing frames are connected with the end part of the vibration tube and the vibration device is connected with the end part of the vibration tube through springs.

The single-beam vibration ash removing device at the bottom of the heating surface of the boiler is beneficial to improving the sealing performance and reducing the vibration amplitude during vibration by arranging the expansion joint at the position where the vibration pipe passes through the wall surface of the boiler, so that the noise and vibration of the boiler are effectively reduced, and the spring is also arranged at the end part of the vibration pipe, which is exposed out of the boiler, so that the rigid vibration of the vibration pipe by the vibration device can be effectively reduced when the vibration device is used for vibrating the vibration pipe, the vibration pipe is prevented from shifting in the vibration process, and the operation stability is improved. The utility model has the advantages of simple structure, safe and reliable use, good sealing performance, good ash removal effect, stable and reliable operation, long service life and reduced operation cost.

Drawings

FIG. 1 is a schematic diagram of a single beam rapping ash removal device at the bottom of a heating surface of a boiler.

Fig. 2 is a schematic view of a rapping device.

Fig. 3 is a schematic view of a rapping plate structure.

Fig. 4 is a schematic side view of a rapping plate.

Fig. 5 is a schematic view of an expansion joint structure.

Fig. 6 is a schematic view of the structure of the rapping tube.

Description of the embodiments

As shown in figures 1-6, the single-beam vibration ash removal device at the bottom of a heating surface of a boiler comprises an expansion joint 1 arranged on the wall surface of the boiler and used for sealing and damping, and a vibration beating pipe 2 penetrating through the expansion joint, wherein a vibration beating plate 3 in contact with the heating surface of the boiler is arranged on the vibration beating pipe, a vibration beating device 4 is arranged at the end part of the vibration beating pipe exposed out of the boiler, fixing frames 5 are arranged at two sides of the end part of the vibration beating pipe, and the fixing frames are connected with the end part of the vibration beating pipe and the vibration beating device is connected with the end part of the vibration beating pipe through springs 6. The vibration amplitude of the vibration pipe penetrating through the wall surface of the boiler is beneficial to improving the sealing performance and reducing vibration when the vibration pipe is in vibration, the vibration pipe is exposed out of the end part of the boiler, the spring is further arranged, when the vibration pipe is in vibration, the rigid vibration of the vibration pipe caused by the vibration device can be effectively reduced, the vibration pipe is prevented from shifting in the vibration process, and the running stability is improved. The utility model has the advantages of simple structure, safe and reliable use, good sealing performance, good ash removal effect, stable and reliable operation, long service life and reduced operation cost.

The rapping tube penetrates from the left side of the horizontal flue of the boiler to the right side of the horizontal flue, and in order to enable each heating surface to be rapped, a reinforced steel plate connected with the rapping tube is arranged on one side of the heating surface, so that the heating surface can be rapped, meanwhile, the direct rapping of the heating surface of the rapping tube can be avoided, the damage of the heating surface is reduced, and the service life is prolonged.

The expansion joint and the vibrating tube are also provided with the sealing ring 7 made of high-temperature lubricating materials, when the vibrating tube vibrates, the expansion joint can better reduce the vibration of the boiler wall, and meanwhile, the sealing ring made of the high-temperature lubricating materials is used for sealing.

The vibrating device comprises a resonance unit element 9 and a vibration motor 10, wherein the resonance unit element is arranged between the vibration motor and the spring, and can generate great exciting force with a small vibration period through the resonance unit element to be transmitted to the vibrating tube, so that the energy consumption is reduced, and the resonance unit element is a metal block with two sides respectively connected with the spring and the vibration motor.

The temperature in the horizontal flue of the general boiler is very high, the vibrating tube is easy to be heated and deformed in the environment of the horizontal flue to influence the effect of vibration ash removal, so that in order to enable the vibrating tube to normally operate in the high-temperature environment of the horizontal flue, the service life of the vibrating tube is prolonged, an air inlet pipe 11 for introducing cold air into the vibrating tube is arranged at one end of the vibrating tube, and the air inlet end of the air inlet pipe is communicated with an air cooler; the other end of the vibrating tube is provided with an air outlet tube 12 for leading out cooled hot air, and the air outlet end of the air outlet tube is communicated with a heat removal bellows.

Because the length of the rapping tube is too long, the middle part of the rapping tube is easy to sag, bend and deform under the action of high temperature and gravity of the boiler, therefore, the hanging hook structures are arranged at the two ends and the middle of the rapping tube and are connected with the top of the boiler through hanging rods, for example, a hanging rod is respectively arranged at 1/3 and 2/3 of the length of the corresponding rapping tube in the boiler, the hanging rod is connected with the rapping tube through bolts, and the top of the hanging rod is fixedly connected with the rigid frame body of the boiler above. Further, in order to enable the rapping tube to be positioned on a horizontal line, a spring is arranged on the hook structure and connected with the hanging rod in order to absorb heat displacement better in a high-temperature environment of the boiler.

Claims (6)

1. The single-beam vibration ash removing device for the bottom of the heating surface of the boiler is characterized by comprising an expansion joint (1) arranged on the wall surface of the boiler and used for sealing and damping, and a vibration tube (2) penetrating through the expansion joint, wherein a vibration plate (3) contacted with the heating surface of the boiler is arranged on the vibration tube, a vibration device (4) is arranged at the end part of the vibration tube exposed out of the boiler, fixing frames (5) are arranged at two sides of the end part of the vibration tube, and the fixing frames are connected with the end part of the vibration tube and the vibration device is connected with the end part of the vibration tube through springs (6).

2. The single-beam rapping ash removal device for the bottom of the heating surface of a boiler according to claim 1, wherein the rapping tube penetrates from the left side of a horizontal flue of the boiler to the right side of the horizontal flue, and a reinforcing steel plate connected with the rapping tube is arranged on one side of the heating surface.

3. The single-beam rapping ash removal device for the bottom of a heated surface of a boiler according to claim 1, characterized in that the rapping device comprises a resonance unit (9) and a vibration motor (10), the resonance unit being mounted between the vibration motor and a spring.

4. The single-beam vibration ash removal device at the bottom of a heating surface of a boiler according to claim 1, wherein one end of a vibration pipe is provided with an air inlet pipe (11) for introducing cold air into the vibration pipe, and the air inlet end of the air inlet pipe is communicated with an air cooler; the other end of the vibrating tube is provided with an air outlet tube (12) for leading out cooled hot air, and the air outlet end of the air outlet tube is communicated with a heat removal bellows.

5. The single-beam rapping ash removal device for the bottom of a heating surface of a boiler according to claim 1, wherein the lifting hook structures are arranged at the two ends and the middle of the rapping tube and are connected with the top of the boiler through the lifting rods.

6. The single beam vibration ash removing device for bottom of heating surface of boiler according to claim 5, wherein a spring is arranged on the hook structure and connected with the hanging rod.