Soot blowing gun and boiler soot blowing system with same

Abstract

The utility model discloses a soot blowing gun and a boiler soot blowing system with the same. The soot blowing gun comprises a mounting base, an inner sleeve, an outer sleeve, a driving device and a distance measuring device. The mounting base is provided with a connecting part used for being connected with the base body. The inner sleeve is connected with the mounting seat, the inner sleeve is provided with a first cavity and a connecting port used for being connected with a steam source, and the first cavity is communicated with the connecting port; the outer sleeve slidably sleeves the inner sleeve, the outer sleeve is provided with a second cavity and a spray hole which are communicated with each other, and the second cavity is communicated with the first cavity; the driving device is used for driving the outer sleeve to slide relative to the inner sleeve; the distance measuring device is arranged on the mounting base and used for detecting the displacement of the outer sleeve. According to the soot blowing gun, the displacement of the outer sleeve can be detected through the distance measuring device, the position of the outer sleeve can be accurately recorded, and an alarm is given to an operator in time when the outer sleeve cannot return to the original position, so that the operator can overhaul the soot blowing gun in time, and the outer sleeve is prevented from deforming due to long-term high-temperature environment.

Description

Technical Field

[0001] The utility model relates to the technical field of soot blowing equipment for boilers of thermal power generating sets, in particular to a soot blowing gun and a boiler soot blowing system having the soot blowing gun. Background Art

[0002] The soot blowing gun of the thermal power generation (coal-fired power) unit blows at a certain frequency during the operation of the unit to blow away the coal ash accumulated on the water-cooled wall in time, preventing the water-cooled wall from overheating locally and bursting the tubes, which may cause unplanned shutdown of the unit, thereby effectively improving the boiler efficiency.

[0003] In the related art, the sootblowing gun is installed on the furnace wall of the boiler. The sootblowing gun includes a guard plate, an inner sleeve and an outer sleeve. The outer sleeve is slidably mounted on the inner sleeve, and one end of the outer sleeve has a spray hole. When the purge work starts, the outer sleeve slides outward and passes through the furnace wall, and the steam sprayed from the spray hole can cover the water-cooled wall. After the purge work is completed, the outer sleeve returns to its original position.

[0004] During the process of returning the outer sleeve, abnormal conditions may occur, resulting in the outer sleeve being unable to be returned. The outer sleeve remains in the furnace, and the operator is unable to promptly learn of the position of the outer sleeve, causing the outer sleeve to be in a high temperature environment for a long time and deform. The outer sleeve is difficult to disassemble and repair after being deformed, thus delaying the purging of the water-cooled wall. Utility Model Content

[0005] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0006] To this end, an embodiment of the utility model proposes a sootblower, which can detect the displacement of the outer sleeve through a distance measuring device, accurately record the position of the outer sleeve, and promptly warn the operator when the outer sleeve fails to return to its original position so as to perform timely maintenance, thereby preventing the outer sleeve from being deformed due to being in a high temperature environment for a long time.

[0007] The sootblowing gun of the utility model embodiment comprises a mounting seat, an inner sleeve, an outer sleeve, a driving device and a distance measuring device, wherein the mounting seat has a connecting portion for connecting to a base body; the inner sleeve is connected to the mounting seat, the inner sleeve has a first cavity and a connecting port for connecting to a steam source, the first cavity is communicated with the connecting port; the outer sleeve is slidably sleeved on the inner sleeve, the outer sleeve has a second cavity and a spray hole that are communicated with each other, the second cavity is communicated with the first cavity; the driving device is used to drive the outer sleeve to slide relative to the inner sleeve; the distance measuring device is arranged on the mounting seat, and the distance measuring device is used to detect the displacement of the outer sleeve.

[0008] In some embodiments, the distance measuring device is a laser rangefinder.

[0009] In some embodiments, the laser rangefinder includes a transmitter and a receiver that cooperate with each other, the transmitter is connected to the mounting seat, and the receiver is connected to the outer sleeve.

[0010] In some embodiments, the sootblowing lance further comprises a pressure sensor, wherein the pressure sensor is connected to the inner casing to detect the steam pressure in the inner casing.

[0011] In some embodiments, the sootblowing gun further comprises a temperature sensor, wherein the temperature sensor is connected to the inner casing to detect the steam temperature in the inner casing.

[0012] In some embodiments, the sootblowing gun further comprises an integrated sensor for detecting steam pressure and steam temperature, wherein the integrated sensor is connected to the inner sleeve and comprises the temperature sensor and the pressure sensor.

[0013] The boiler sootblowing system of the embodiment of the utility model comprises the sootblowing gun described in any one of the above embodiments.

[0014] In some embodiments, the boiler sootblowing system further includes a controller and an alarm, and the distance measuring device and the alarm are both electrically connected to the controller.

[0015] In some embodiments, the sootblowing gun further comprises the pressure sensor, and the pressure sensor is electrically connected to the controller.

[0016] In some embodiments, the sootblowing gun further includes the temperature sensor, and the temperature sensor is electrically connected to the controller.

[0017] The sootblower of the utility model embodiment is suitable for purging the water-cooled wall of the boiler. The outer sleeve is driven by the driving device to slide outward and reach the water-cooled wall. At the same time, steam is sprayed on the water-cooled wall from the connection port of the inner sleeve through the first cavity and the second cavity in sequence, so as to realize the purging of the water-cooled wall. After the purging work is completed, the outer sleeve is driven by the driving device to return to its original position. Among them, the distance measuring device can detect the displacement of the outer sleeve, accurately record the position of the outer sleeve, and promptly warn the operator when the outer sleeve fails to return to its original position, so as to timely repair it, thereby preventing the outer sleeve from being deformed due to being in a high temperature environment for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic structural diagram of the outer sleeve of the sootblowing gun according to one embodiment of the present invention being retracted.

[0019] Figure 2 The utility model is a schematic structural diagram of a sootblowing gun in which an outer sleeve is extended.

[0020] Reference numerals:

[0021] 10. Soot blowing gun;

[0022] 1. Mounting seat;

[0023] 2. Inner sleeve; 21. First cavity; 22. Connecting port;

[0024] 3. outer sleeve; 31. second cavity; 32. tube body; 33. gun head;

[0025] 4. Driving device;

[0026] 51. Steam pipe; 52. Poppet valve;

[0027] 6. Laser rangefinder; 61. Transmitter; 62. Receiver;

[0028] 7. Integrated sensor. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0030] like Figure 1 and Figure 2 As shown, an embodiment of the utility model includes a mounting seat 1, an inner sleeve 2, an outer sleeve 3, a driving device 4 and a distance measuring device. The mounting seat 1 has a connecting portion for connecting to a substrate, the inner sleeve 2 is connected to the mounting seat 1, the inner sleeve 2 has a first cavity 21 and a connecting port 22 for connecting to a steam source, the first cavity 21 is connected to the connecting port 22, the outer sleeve 3 is slidably sleeved on the inner sleeve 2, the outer sleeve 3 has a second cavity 31 and a spray hole that are connected to each other, the second cavity 31 is connected to the first cavity 21; the driving device 4 is used to drive the outer sleeve 3 to slide relative to the inner sleeve 2; the distance measuring device is arranged on the mounting seat 1, and the distance measuring device is used to detect the displacement of the outer sleeve 3.

[0031] The sootblowing gun 10 of the utility model embodiment is suitable for purging the water-cooled wall of the boiler. The outer sleeve 3 is driven to slide outward and reach the water-cooled wall position by the driving device 4. At the same time, the steam is sprayed on the water-cooled wall from the connection port 22 of the inner sleeve 2 through the first cavity 21 and the second cavity 31 in sequence, so as to realize the purging of the water-cooled wall; after the purging work is completed, the outer sleeve 3 is driven by the driving device 4 to return to its original position. Among them, the distance measuring device can detect the displacement of the outer sleeve 3, accurately record the position of the outer sleeve 3, and promptly warn the operator when the outer sleeve 3 fails to return to its original position, so as to timely overhaul, thereby preventing the outer sleeve 3 from being deformed due to being in a high temperature environment for a long time.

[0032] In addition, when the outer sleeve 3 stops operating midway and fails to reach the target position, the steam ejected from the nozzle cannot completely cover the water-cooled wall, and the purging effect is poor. By recording the position of the outer sleeve 3 during the extension and retraction process, an alarm can be issued to the operator when the outer sleeve 3 stops operating midway to prevent equipment damage caused by the lack of cooling steam in some areas of the water-cooled wall.

[0033] Optionally, the connecting portion is a support leg, and the mounting base 1 is supported on the ground by the support leg to achieve stable installation of the sootblowing gun 10 .

[0034] Optionally, the mounting seat 1 is in the shape of an elongated strip, and its cross section is "U"-shaped with an opening facing downward. In other words, the mounting seat 1 has a mounting groove with an opening facing downward, and the inner sleeve 2, the outer sleeve 3, the driving device 4, and the distance measuring device are all arranged in the mounting groove.

[0035] Therefore, the mounting seat 1 can protect the inner sleeve 2, the outer sleeve 3, the driving device 4, the distance measuring device and other components.

[0036] As an example, Figure 1 and Figure 2 As shown, the connection port 22 of the inner sleeve 2 is connected to a steam pipe 51, and a lift valve 52 is provided between the steam pipe 51 and the inner sleeve 2, and the lift valve 52 is used to control the on-off of the steam pipe 51 and the inner sleeve 2; the driving device 4 is slidably connected to the mounting seat 1, and the outer sleeve 3 is connected to the driving device 4, so that the outer sleeve 3 is extended and retracted along its own length direction under the drive of the driving device 4, and the driving device 4 moves synchronously with the outer sleeve 3; the outer sleeve 3 includes a tube body 32 and a gun head 33, and the gun head 33 is provided at the end of the tube body 32 close to the water-cooled wall, and the gun head 33 has the above-mentioned spray hole.

[0037] When the outer sleeve 3 extends outward, the lifting valve 52 opens, and the cooling steam in the steam pipe 51 enters the inner sleeve 2 and is then sprayed out through the spray hole on the gun head 33 to purge the water-cooled wall. When the outer sleeve 3 returns to its original position, the lifting valve 52 closes to prevent the cooling steam from blowing the water-cooled wall for a long time and causing damage to the water-cooled wall, pipe burst, etc.

[0038] In some embodiments, the distance measuring device is a laser distance measuring device 6 .

[0039] By using the laser rangefinder 6 as the distance measuring device, the accuracy and timeliness of the displacement detection of the outer sleeve 3 can be improved.

[0040] In some embodiments, the laser rangefinder 6 includes a transmitter 61 and a receiver 62 that cooperate with each other, the transmitter 61 is connected to the mounting base 1, and the receiver 62 is connected to the outer sleeve 3.

[0041] Through the above settings, the receiver 62 can receive the laser signal emitted by the transmitter 61 to measure the distance between the transmitter 61 and the receiver 62, so that when the receiver 62 moves with the outer sleeve 3, the displacement of the outer sleeve 3 can be measured to obtain the position information of the outer sleeve 3.

[0042] As an example, Figure 1 As shown, the outer sleeve 3 is accompanied by rotational movement during the extension and retraction process; in this case, the receiver 62 can be installed on the housing of the drive device 4 through a bracket to prevent the receiver 62 from rotating with the outer sleeve 3, thereby ensuring the stability of the position of the receiver 62, thereby achieving accurate measurement of the displacement of the outer sleeve 3.

[0043] In some embodiments, the sootblowing lance 10 further includes a pressure sensor, which is connected to the inner casing 2 to detect the steam pressure in the inner casing 2 .

[0044] It is known that during the extension or retraction of the outer sleeve 3, the gun head 33 may fall off. If the operator fails to handle it in time, it may cause equipment damage and the water-cooled wall may not be purged with cooling steam.

[0045] By setting up a pressure sensor, the operator can obtain the pressure condition in the inner sleeve 2 at any time. During the purging process, if the gun head 33 falls off, the pressure sensor can monitor the rapid decrease in the steam pressure of the inner sleeve 2 so that the operator can handle it in time.

[0046] In addition, by real-time monitoring of the steam pressure of the inner sleeve 2, it is also possible to prevent the purge steam pressure from being too high to damage the water-cooled wall or the pressure from being too low to achieve the purge purpose.

[0047] In some embodiments, the sootblowing lance 10 further includes a temperature sensor, which is connected to the inner casing 2 to detect the steam temperature in the inner casing 2 .

[0048] It is known that when the water content of the purge steam is relatively high, the purge steam temperature may be too low, thereby damaging the purged equipment (eg, water-cooled wall).

[0049] By setting a temperature sensor, the operator can obtain the temperature of the steam in the inner sleeve 2 at any time, and handle it in time when the steam temperature is too low to prevent the purge steam with too low temperature from blowing on the water-cooled wall for a long time and causing damage to the water-cooled wall.

[0050] In addition, when the lifting valve 52 has internal leakage, the lifting valve 52 can no longer block the steam from entering the inner sleeve 2 after the outer sleeve 3 returns to its original position, causing the spray hole to continue to spray steam; the temperature and pressure in the inner sleeve 2 after the outer sleeve 3 returns to its original position can be obtained through the temperature sensor and the pressure sensor, thereby determining whether the lifting valve 52 has internal leakage, so that the lifting valve 52 can be repaired in time.

[0051] In some embodiments, the sootblowing gun 10 further includes an integrated sensor 7 for detecting steam pressure and steam temperature. The integrated sensor 7 is connected to the inner sleeve 2 and includes a temperature sensor and a pressure sensor.

[0052] By integrating the temperature sensor and the pressure sensor into an integrated sensor 7, the installation space of the temperature sensor and the pressure sensor can be reduced, the convenience of installation can be improved, and the cost can be reduced.

[0053] The boiler sootblowing system of the embodiment of the utility model comprises the sootblowing gun 10 of any one of the above embodiments.

[0054] The boiler sootblowing system of the embodiment of the utility model can measure the displacement of the outer sleeve 3 through the distance measuring device, accurately record the position of the outer sleeve 3, and promptly warn the operator when the outer sleeve 3 fails to return to its original position so as to perform timely maintenance, thereby preventing the outer sleeve 3 from being deformed due to being in a high temperature environment for a long time.

[0055] In some embodiments, the boiler sootblowing system further includes a controller and an alarm, and the distance measuring device and the alarm are both electrically connected to the controller.

[0056] The distance measuring device is used to detect the displacement of the outer sleeve 3 and send a signal to the controller. The controller determines whether the outer sleeve 3 is in a normal working state (normal extension and normal retraction) based on the received signal. When the controller determines that the outer sleeve 3 is in an abnormal working state, the controller controls the alarm to sound an alarm so as to notify the operator in time.

[0057] Optionally, the alarm is a buzzer or a flashing light.

[0058] In some embodiments, the sootblowing lance 10 includes a pressure sensor, and the pressure sensor is electrically connected to the controller.

[0059] By connecting the pressure sensor to the controller, the controller can analyze the pressure signal detected by the pressure sensor. When the steam pressure in the inner casing 2 is abnormal, an alarm is sounded through the alarm so that the operator can perform maintenance in time.

[0060] In some embodiments, the sootblowing lance 10 includes a temperature sensor, and the temperature sensor is electrically connected to the controller.

[0061] By connecting the temperature sensor to the controller, the controller can analyze the temperature signal detected by the temperature sensor. When the steam temperature in the inner casing 2 is abnormal, an alarm is sounded through the alarm so that the operator can perform maintenance in time.

[0062] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A sootblowing gun (10), characterized in that: include: A mounting seat (1), the mounting seat (1) having a connecting portion for connecting to a base body; an inner sleeve (2), the inner sleeve (2) being connected to the mounting seat (1), the inner sleeve (2) having a first cavity (21) and a connection port (22) for connecting to a steam source, the first cavity (21) being in communication with the connection port (22); an outer sleeve (3), the outer sleeve (3) being slidably sleeved on the inner sleeve (2), the outer sleeve (3) comprising a second cavity (31) and a spray hole which are in communication with each other, the second cavity (31) being in communication with the first cavity (21); A driving device (4), the driving device (4) being used to drive the outer sleeve (3) to slide relative to the inner sleeve (2); A distance measuring device is provided on the mounting seat (1), and is used to detect the displacement of the outer sleeve (3).

2. The sootblowing gun (10) according to claim 1, characterized in that: The distance measuring device is a laser distance measuring device (6).

3. The sootblowing gun (10) according to claim 2, characterized in that: The laser rangefinder (6) comprises a transmitter (61) and a receiver (62) that cooperate with each other, wherein the transmitter (61) is connected to the mounting seat (1), and the receiver (62) is connected to the outer sleeve (3).

4. The sootblowing gun (10) according to claim 1, characterized in that: It also comprises a pressure sensor, which is connected to the inner sleeve (2) to detect the steam pressure in the inner sleeve (2).

5. The sootblowing gun (10) according to claim 4, characterized in that: It also comprises a temperature sensor, which is connected to the inner sleeve (2) to detect the steam temperature in the inner sleeve (2).

6. The sootblowing gun (10) according to claim 5, characterized in that: It also comprises an integrated sensor (7) for detecting steam pressure and steam temperature, wherein the integrated sensor (7) is connected to the inner sleeve (2), and the integrated sensor (7) comprises the temperature sensor and the pressure sensor.

7. A boiler sootblowing system, characterized in that: It comprises a sootblowing gun (10) as claimed in any one of claims 1 to 6.

8. The boiler sootblowing system according to claim 7, characterized in that: It also includes a controller and an alarm, and the distance measuring device and the alarm are both electrically connected to the controller.

9. The boiler sootblowing system according to claim 8, characterized in that: The sootblowing gun (10) is the sootblowing gun (10) according to claim 4, and the pressure sensor is electrically connected to the controller.

10. The boiler sootblowing system according to claim 8, characterized in that: The sootblowing gun (10) is the sootblowing gun (10) according to claim 5, and the temperature sensor is electrically connected to the controller.

Images