A kind of hole measuring anti-coking and dust blocking device for boiler monitoring equipment

Abstract

The utility model discloses a kind of hole monitoring equipment is prevented coking and ash blocking device for boiler, belong to the field of boiler auxiliary equipment, including hot air supply component, anti-coking and ash blocking main body, cooling protection component and ash handling assembly;Anti-coking and ash blocking main body one end is communicated with boiler hot air box by hot air supply component to obtain high-temperature hot air, other end is fixedly connected with cooling protection component and inserts the monitoring equipment installation measuring hole, bottom is equipped with ash handling assembly;Hot air supply component adjusts hot air flow, anti-coking and ash blocking main body is equipped with cold air inlet temperature control, cooling protection component blocks high temperature and cools monitoring probe, ash handling assembly removes intra-cavity ash.The utility model uses the hole monitoring equipment is prevented coking and ash blocking device for boiler described above, can guarantee monitoring equipment stable operation, reduce maintenance cost, and strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of boiler auxiliary equipment technology, and in particular to a device for preventing coking and ash blockage in the measuring hole of a boiler monitoring device. Background Technology

[0002] During the operation of boilers in thermal power plants, monitoring devices such as furnace flame television, high-temperature image monitoring systems, online slagging monitoring equipment, and infrared monitoring equipment are typically installed to monitor the ignition and combustion parameters inside the furnace in real time. These monitoring devices generally use openings on the boiler's heating surface to directly acquire flame or combustion data inside the furnace through the measuring holes, thereby achieving real-time monitoring of the boiler's operating status.

[0003] To prevent coking or contamination of the measuring holes and equipment probes, existing technologies often use compressed air to purge the measuring hole area. However, this approach has significant drawbacks in practical applications: compressed air is considered "cold air" relative to the high-temperature environment inside the furnace, causing a significant drop in temperature in the measuring hole area during purging. When molten ash particles inside the furnace come into contact with the low-temperature heated surfaces of the measuring holes, probes, or lenses, they rapidly condense, agglomerate, and adhere to the surface, gradually accumulating and deteriorating into coke lumps. Although compressed air has some purging capability, its negative impact of "cooling and causing ash particle condensation" far outweighs the purging and coking effect, ultimately leading to monitoring equipment being unable to clearly obtain flame information inside the furnace, inaccurate detection data, and even equipment malfunctions. Furthermore, coke removal requires frequent shutdowns for maintenance, significantly increasing the workload of operation and maintenance personnel and affecting the overall operating efficiency of the boiler. Utility Model Content

[0004] The purpose of this invention is to provide a device for preventing coking and ash blockage in the measuring holes of boiler monitoring equipment. By optimizing the purging medium and device structure, it solves the problem of ash particles condensing and coking in the measuring hole area, ensuring the stable operation of the monitoring equipment and reducing maintenance costs.

[0005] To achieve the above objectives, this utility model provides a device for preventing coking and ash blockage in a boiler monitoring device, comprising a hot air supply component, an anti-coking and ash blockage body, a cooling protection component, and an ash accumulation treatment component; one end of the anti-coking and ash blockage body is connected to the boiler hot air box through the hot air supply component, and the other end is fixedly connected to the cooling protection component, and the end of the anti-coking and ash blockage body near the cooling protection component is inserted into the monitoring device mounting hole of the boiler; the ash accumulation treatment component is provided at the bottom of the anti-coking and ash blockage body.

[0006] Preferably, the hot air supply assembly includes a hot air duct, one end of which is connected to the boiler hot air box and the other end is connected to the anti-coking and ash-blocking body. A gate valve and a regulating butterfly valve are sequentially arranged on the hot air duct. The gate valve is used for maintenance of the hot air duct, and the regulating butterfly valve is used to regulate the hot air flow rate in the hot air duct.

[0007] Preferably, the anti-coking and ash-blocking body includes a large hot air cavity, an annular hot air outlet pipe, and a high-temperature short section. The inlet of the large hot air cavity is connected to the end of the hot air pipe away from the boiler hot air box. The annular hot air outlet pipe is located at one end of the large hot air cavity. One end of the high-temperature short section is connected to the side of the annular hot air outlet pipe away from the large hot air cavity. The other end of the high-temperature short section is used to insert into the installation hole of the monitored equipment of the boiler. The large hot air cavity is also provided with a cold air inlet, which is used to introduce cold air to regulate the temperature of the hot air in the large hot air cavity.

[0008] Preferably, the cooling protection assembly includes a monitoring instrument mounting base, a monitoring instrument mounting hole, and a perforated slit. The monitoring instrument mounting base is located on the side of the anti-coking and ash-blocking body away from the high-temperature section. The monitoring instrument mounting hole is located in the middle of the monitoring instrument mounting base and is used to install boiler monitoring instruments. An inner cavity is formed inside the monitoring instrument mounting base, which communicates with the cold air inlet to form a heat-insulating cooling cavity. The perforated slit is located on the side of the inner cavity of the monitoring instrument mounting base facing the monitoring instrument mounting hole, and the inner cavity of the monitoring instrument mounting base communicates with the monitoring instrument mounting hole through the perforated slit.

[0009] Preferably, the ash treatment component includes an ash discharge pipe and an ash discharge valve. One end of the ash discharge pipe is connected to the bottom of the hot air chamber, and the other end is provided with an ash discharge valve.

[0010] Preferably, the hot air duct is detachably connected to the inlet of the hot air chamber via a connecting flange.

[0011] Preferably, the annular hot air outlet pipe is arranged around the outer periphery of the high-temperature section, so that the hot air can be sprayed out evenly along the circumference of the high-temperature section.

[0012] Preferably, the medium connected to the cold air inlet is cold air, instrument gas, or miscellaneous gas.

[0013] Therefore, the present invention employs the above-mentioned anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment, which has the following technical effects: (1) This application uses high-temperature hot air from the boiler hot air box as the purging medium to avoid the condensation of ash particles caused by the low temperature in the measuring hole area. At the same time, the uniform jet design of the annular hot air outlet pipe, combined with the high jet rigidity of the hot air, can effectively remove the initial ash accumulation and solve the problem of coking and ash blockage in the measuring hole.

[0014] (2) This application uses a dual design of heat insulation cooling cavity and probe cooling to block high temperature conduction and directly cool the probe, ensuring that the monitoring equipment operates at a safe temperature for a long time and extending the service life of the equipment.

[0015] (3) This application is equipped with a dust collection treatment component. Regular dust removal can avoid channel blockage and eliminate the need for frequent shutdowns for disassembly and cleaning. At the same time, the hot air pipe is disassembled and connected to the hot air cavity, which facilitates device maintenance.

[0016] (4) The cold air inlet of this application can be connected to cold air, instrument gas or miscellaneous gas, and the hot air flow rate can be flexibly adjusted by adjusting the butterfly valve to adapt to different types of boiler monitoring equipment and different operating conditions.

[0017] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a borehole anti-coking and ash-blocking device for boiler monitoring equipment according to this utility model; Figure 2 This is a schematic diagram of the implementation of a borehole anti-coking and ash-blocking device for boiler monitoring equipment according to this utility model.

[0019] Figure Labels 1. Hot air duct; 2. Regulating butterfly valve; 3. Mounting hole for monitored equipment; 4. Anti-coking and ash-blocking device for measuring holes of boiler monitoring equipment; 41. Mounting hole for monitoring instruments and equipment; 42. Mounting base plate for monitoring instruments and equipment; 43. Inner cavity of mounting base plate for monitoring instruments and equipment; 44. High-temperature short section; 45. Annular hot air outlet pipe; 46. Large hot air cavity; 47. Ash discharge pipe; 48. Ash discharge valve; 49. Connecting flange; 410. Cold air interface; 411. Perforated slit. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1 As shown, a boiler monitoring equipment hole anti-coking and ash-blocking device 4 includes a hot air supply component, an anti-coking and ash-blocking body, a cooling protection component, and an ash accumulation treatment component. One end of the anti-coking and ash-blocking body is connected to the boiler hot air box through the hot air supply component to obtain high-temperature hot air; the other end is fixedly connected to the cooling protection component, and the end of the anti-coking and ash-blocking body near the cooling protection component is inserted into the boiler monitoring equipment installation hole 3; the bottom of the anti-coking and ash-blocking body is provided with an ash accumulation treatment component for discharging the ash particles deposited in the cavity. The components work together to achieve anti-coking and ash-blocking of the hole and equipment protection.

[0023] The hot air supply assembly includes a hot air pipe 1. One end of the hot air pipe 1 is connected to the boiler hot air box, and the other end is connected to the anti-coking and ash-blocking body to provide a high-temperature hot air source for the device. A gate valve and a regulating butterfly valve 2 are sequentially installed on the hot air pipe 1. The gate valve is used to cut off the passage when the hot air pipe 1 is under maintenance, and the regulating butterfly valve 2 is used to flexibly adjust the hot air flow rate in the hot air pipe 1 to adapt to different working conditions.

[0024] The anti-coking and ash-blocking main body includes a large hot air cavity 46, an annular hot air outlet pipe 45, and a high-temperature short section 44. The inlet of the large hot air cavity 46 is connected to the end of the hot air pipe 1 away from the boiler hot air box, providing a temporary storage and mixing space for the hot air. The annular hot air outlet pipe 45 is located at one end of the large hot air cavity 46 and surrounds the outer periphery of the high-temperature short section 44, so that the hot air can be evenly sprayed out along the circumference of the high-temperature short section 44, ensuring full coverage protection of the measuring hole area. One end of the high-temperature short section 44 is connected to the annular hot air outlet pipe 45. The inlet pipe 45 is connected to the side away from the hot air chamber 46, and the other end is used to insert into the monitoring device's mounting hole 3 on the boiler, serving as the connection carrier between the device and the boiler's mounting hole. The high-temperature short section 44 is made of stainless steel, with temperature resistance suitable for boiler operating conditions. The hot air chamber 46 is also equipped with a cold air inlet for receiving cold air, instrument gas, or miscellaneous gas. By adjusting the flow rate of the incoming medium, precise control of the hot air temperature inside the hot air chamber 46 can be achieved, preventing damage to the equipment due to excessively high temperatures or coking due to excessively low temperatures. In addition, the hot air pipe 1 is detachably connected to the inlet of the hot air chamber 46 via a connecting flange 49, facilitating device installation, inspection, and maintenance.

[0025] The cooling protection assembly includes a monitoring instrument mounting base plate 42, a monitoring instrument mounting hole 41, and a perforated slit 411. The monitoring instrument mounting base plate 42 is located on the side of the anti-coking and ash-blocking body away from the high-temperature section 44, providing a mounting foundation for the monitoring equipment. The monitoring instrument mounting hole 41 is located in the middle of the mounting base plate 42 and is used to fix and install boiler monitoring instruments, such as flame television probes and infrared monitoring probes. The mounting base plate 42 has an inner cavity 43, which is connected to the cold air inlet to form a heat-insulating cooling cavity, which can block the high temperature of hot air from being conducted to the monitoring instruments. The perforated slit 411 is located on the side of the inner cavity 43 facing the mounting hole 41. The inner cavity 43 is connected to the mounting hole 41 through the perforated slit 411, allowing the cooling medium (cold air, instrument gas, or miscellaneous gas) to enter the mounting hole 41. This cools the monitoring equipment probe, ensuring that the equipment operates at a safe temperature, and also blows away the dust in the mounting hole 41, preventing the probe from becoming contaminated.

[0026] The ash treatment component includes an ash discharge pipe 47 and an ash discharge valve 48. One end of the ash discharge pipe 47 is connected to the bottom of the hot air chamber 46, and the other end is equipped with an ash discharge valve 48. Since the hot air medium comes from the atmosphere, it inevitably carries dust. The dust is easily deposited in the hot air chamber 46 due to changes in the flow field. The ash discharge valve 48 is opened periodically to discharge the ash through the ash discharge pipe 47, preventing the hot air channel from being blocked and ensuring the stable operation of the device.

[0027] Working principle: Device installation like Figure 2As shown, firstly, the high-temperature short section 44 in the anti-coking and ash-blocking body is inserted into the monitoring device mounting hole 3 of the boiler. The connection between the high-temperature short section 44 and the measuring hole is bolted, or welding can be used according to the working conditions to ensure sealing and stability. One end of the hot air pipe 1 is detachably connected to the inlet of the hot air large cavity 46 through the connecting flange 49, and the other end of the hot air pipe 1 is connected to the boiler hot air box. A gate valve (not marked in the figure, located upstream of the regulating butterfly valve 2) and a regulating butterfly valve 2 are installed in sequence on the hot air pipe 1. The gate valve is used for subsequent pipeline maintenance, and the regulating butterfly valve 2 is used to regulate the hot air flow. The monitoring instrument is inserted into the monitoring instrument mounting hole 41 and fixed to the monitoring instrument mounting base plate 42 with bolts to ensure that the device probe is aligned with the monitoring area inside the furnace. The cooling medium pipeline is connected to the cold air interface 410, and the ash discharge pipe 47 is installed at the bottom of the hot air large cavity 46. An ash discharge valve 48 is installed at the end of the ash discharge pipe 47.

[0028] Device operation Hot air supply and temperature regulation: Open the gate valve on the hot air pipe 1, and the high-temperature hot air from the boiler hot air box enters the hot air large cavity 46 through the hot air pipe 1; adjust the hot air flow rate by adjusting the butterfly valve 2 according to the working conditions, and at the same time connect the cooling medium through the cold air interface 410 to regulate the temperature of the mixed hot air in the hot air large cavity 46. Anti-coking and ash blockage: The mixed high-temperature hot air enters the annular hot air outlet pipe 45. Since the annular hot air outlet pipe 45 is set around the outer periphery of the high-temperature short section 44, the hot air is evenly sprayed towards the measuring hole area along the circumference of the high-temperature short section 44. On the one hand, the high temperature prevents the molten ash particles in the furnace from condensing and agglomerating on the surface of the measuring hole and the high-temperature short section 44. On the other hand, the high jet rigidity of the hot air blows away the initially attached ash particles, thus achieving anti-coking and ash blockage of the measuring hole. Equipment cooling protection: The cooling medium connected to the cold air interface 410 enters the inner cavity 43 of the monitoring instrument and equipment mounting base plate, blocking the high temperature of the hot air large cavity 46 from being conducted to the monitoring instrument and equipment; at the same time, some of the cooling medium enters the monitoring instrument and equipment mounting hole 41 through the perforated slit 411, directly cooling the monitoring equipment probe, ensuring the safe operating temperature of the equipment, and blowing away the dust in the mounting hole 41 to prevent the probe from getting contaminated. Dust accumulation treatment: During operation, dust carried by hot air will accumulate at the bottom of the hot air chamber 46. Every hour of operation, close the gate valve of hot air pipe 1 and open the ash discharge valve 48 to discharge the deposited dust particles through the ash discharge pipe 47. After the ash discharge is completed, close the ash discharge valve 48 and reopen the gate valve to resume operation, so as to avoid dust clogging the hot air passage.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. A device for preventing coking and ash blockage in the measuring hole of a boiler monitoring equipment, characterized in that: It includes a hot air supply component, an anti-coking and ash-blocking body, a cooling protection component, and an ash accumulation treatment component; one end of the anti-coking and ash-blocking body is connected to the boiler hot air box through the hot air supply component, and the other end is fixedly connected to the cooling protection component, and the end of the anti-coking and ash-blocking body near the cooling protection component is inserted into the installation hole of the monitored equipment of the boiler; the ash accumulation treatment component is provided at the bottom of the anti-coking and ash-blocking body.

2. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 1, characterized in that: The hot air supply assembly includes a hot air duct, one end of which is connected to the boiler hot air box and the other end is connected to the anti-coking and ash-blocking body. A gate valve and a regulating butterfly valve are sequentially installed on the hot air duct. The gate valve is used for the maintenance of the hot air duct, and the regulating butterfly valve is used to regulate the hot air flow rate in the hot air duct.

3. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 2, characterized in that: The anti-coking and ash-blocking main body includes a large hot air cavity, an annular hot air outlet pipe, and a high-temperature short section. The inlet of the large hot air cavity is connected to the end of the hot air pipe away from the boiler hot air box. The annular hot air outlet pipe is located at one end of the large hot air cavity. One end of the high-temperature short section is connected to the side of the annular hot air outlet pipe away from the large hot air cavity. The other end of the high-temperature short section is used to insert into the installation hole of the monitored equipment in the boiler. The large hot air cavity is also provided with a cold air inlet, which is used to introduce cold air to regulate the temperature of the hot air in the large hot air cavity.

4. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 3, characterized in that: The cooling protection assembly includes a monitoring instrument mounting base, a monitoring instrument mounting hole, and a perforated slit. The monitoring instrument mounting base is located on the side of the anti-coking and ash-blocking body away from the high-temperature section. The monitoring instrument mounting hole is located in the middle of the monitoring instrument mounting base and is used to install boiler monitoring instruments. An inner cavity is formed inside the monitoring instrument mounting base, which communicates with the cold air inlet to form a heat-insulating cooling cavity. The perforated slit is located on the side of the inner cavity of the monitoring instrument mounting base facing the monitoring instrument mounting hole, and the inner cavity of the monitoring instrument mounting base communicates with the monitoring instrument mounting hole through the perforated slit.

5. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 3, characterized in that: The ash treatment component includes an ash discharge pipe and an ash discharge valve. One end of the ash discharge pipe is connected to the bottom of the hot air chamber, and the other end is equipped with an ash discharge valve.

6. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 3, characterized in that: The hot air duct is detachably connected to the inlet of the hot air chamber via a connecting flange.

7. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 3, characterized in that: The annular hot air outlet pipe is arranged around the outer periphery of the high-temperature section, so that the hot air can be sprayed out evenly along the circumference of the high-temperature section.

8. The anti-coking and ash-blocking device for measuring holes in boiler monitoring equipment according to claim 4, characterized in that: The medium connected to the cold air inlet is cold air, instrument gas, or miscellaneous gas.

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