Flame detection ash removal device and method

Abstract

The invention relates to the technical field of thermal power plant flame detection devices, in particular to a flame detection ash removal device and method.The flame detection ash removal device comprises a flame detection assembly, and the flame detection assembly comprises a flame detection probe and a flame detection sleeve arranged on one side of the flame detection probe in a sleeving mode; the ash removal assembly comprises a first gas source pipe and a second gas source pipe which are movably arranged in the flame detection sleeve; the outer wall of the first gas source pipe and the outer wall of the second gas source pipe are provided with a plurality of spiral forward exhaust grooves. The boiler has the beneficial effects that the first air source pipe is additionally arranged in the flame detection sleeve to intermittently supply air and blow ash into the flame detection sleeve, the problems that the pressure of cooling air of an original boiler is low, and accumulated ash in the flame detection sleeve cannot be blown away are solved, and furthermore, through intermittent air supply and ash blowing, the efficiency of the boiler is improved. The operation that a worker needs to disassemble and clean the flame detection sleeve at any time is avoided; and the reason of insufficient flame detection intensity in the boiler at the moment is detected through a flame detection ash removal method and the cooperation of the first gas source pipe and the second gas source pipe.

Description

Technical Field

[0001] The invention relates to the technical field of fire detection devices in thermal power plants, in particular to a fire detection and dust cleaning device and method. Background Art

[0002] Due to process problems, the cooling air pressure of some fire detection devices in the unit's fire detection system is low, the intensity is weak, and the wind force is dispersed, which cannot blow away the accumulated ash in the fire detection sleeve. When the ash accumulates to a certain extent, an ash pile will form in the fire detection sleeve (between the fire detection probe and the flame), blocking the flame. The fire detection probe cannot detect the flame, which will cause the fire detection intensity to be low and an alarm will be sounded. In severe cases, it will cause the furnace to jump. The maintenance personnel must remove the probe and use a pipe to blow away the ash pile. The work is cumbersome and very dangerous. Sometimes it has to be handled late at night, which makes the work of the on-site staff very passive. Summary of the invention

[0003] In view of the above existing technical problems, the present invention is proposed.

[0004] In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a fire detection and cleaning device, which includes a fire detection component, the fire detection component includes a fire detection probe and a fire detection sleeve mounted on one side of the fire detection probe; a cleaning component, the cleaning component includes a first air source pipe and a second air source pipe movably arranged inside the fire detection sleeve; wherein, the outer walls of the first air source pipe and the second air source pipe are provided with a plurality of spiral forward exhaust grooves.

[0005] As a preferred solution of the fire detection and cleaning device of the present invention, wherein: the fire detection sleeve is also connected to an air duct, and an imaging device is arranged inside the fire detection sleeve.

[0006] As a preferred solution of the fire detection and cleaning device of the present invention, wherein: a through hole is opened inside the fire detection sleeve, and a thin tube is movably arranged inside the through hole.

[0007] As a preferred solution of the fire detection and cleaning device of the present invention, the first gas source tube and the second gas source tube are connected with a joint at one end close to the fire detection probe, the joint is also connected to the capillary tube, and the other end of the capillary tube is connected with a miscellaneous gas source.

[0008] As a preferred solution of the fire detection and cleaning device of the present invention, a gravity sensor module is also arranged inside the fire detection sleeve, a time relay and a solenoid valve are connected to the first gas source pipe, and a solenoid valve is also connected to the second gas source pipe.

[0009] The present invention also provides the following technical solution: a fire detection and ash cleaning method, comprising detecting in real time by the fire detection probe whether the fire detection intensity inside the boiler is less than a threshold value;

[0010] The fire detection probe threshold is 100cd / ㎡.

[0011] If so, determine whether there is ash in the fire detection sleeve through the imaging device;

[0012] If yes, then determine whether the gravity sensor is activated at this time;

[0013] If so, start the solenoid valve connected to the second gas source pipe to clean the fire detection sleeve.

[0014] As a preferred solution of the fire detection and dust removal method of the present invention, wherein: judging whether there is dust in the fire detection sleeve by the imaging device;

[0015] If not, determine whether there is fire inside the boiler at this time;

[0016] If yes, adjust the air flow of the boiler;

[0017] If not, re-ignite the boiler.

[0018] As a preferred solution of the fire detection and cleaning method of the present invention, wherein: determining whether the gravity sensor is activated at this time;

[0019] If not, then there are other problems inside the boiler at this time, and the boiler should be re-inspected.

[0020] As a preferred solution of the fire detection and ash cleaning method of the present invention, the fire detection probe is used to detect in real time whether the fire detection intensity inside the boiler is less than a threshold value;

[0021] If not, the device is operating normally.

[0022] As a preferred solution of the fire detection and cleaning method of the present invention, the normal operation includes intermittently controlling the opening or closing of the electromagnetic valve connected to the first gas source pipe by the time relay to regularly purge the fire detection sleeve.

[0023] The beneficial effects of the fire detection and cleaning device and method of the present invention are as follows: by intermittently supplying air and blowing out soot into the fire detection sleeve through the first air source pipe added in the fire detection sleeve, the problem of low cooling air pressure of the original boiler and failure to blow away the accumulated ash in the fire detection sleeve is prevented; further, by intermittently supplying air and blowing out soot, the need for staff to disassemble and clean the fire detection sleeve at any time is avoided; and by the fire detection and cleaning method and the cooperation of the first air source pipe and the second air source pipe, the reason for the insufficient fire detection intensity inside the boiler at this time is detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is an overall schematic diagram of the fire detection and cleaning device in the present invention.

[0026] Figure 2 It is a cross-sectional view of the fire detection and cleaning device in the present invention.

[0027] Figure 3 It is a side view of the fire detection and cleaning device in the present invention.

[0028] Figure 4 It is the logic diagram of the fire detection and cleaning method in the present invention.

[0029] Figure 5 This is a normal operation diagram of the fire detection and cleaning method in the present invention. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0033] Example 1, reference Figure 1 to Figure 3 , which is the first embodiment of the present invention, and provides a fire detection and dust cleaning device, including a fire detection component 100, the fire detection component 100 includes a fire detection probe 102 and a fire detection sleeve 101 sleeved on one side of the fire detection probe 102;

[0034] Preferably, the end of the fire detection sleeve 101 away from the fire detection probe 102 is connected to the boiler flame, and the fire detection probe 102 detects the fire detection intensity inside the boiler at this time through the fire detection sleeve 101; when the fire detection intensity is less than the threshold, the fire detection probe immediately alarms, prompting the crew to repair the boiler unit.

[0035] The dust cleaning component 200 includes a first gas source pipe 201 and a second gas source pipe 202 movably arranged inside the fire detection sleeve 101; wherein, the outer walls of the first gas source pipe 201 and the second gas source pipe 202 are provided with a plurality of spiral forward exhaust grooves 201a.

[0036] Preferably, the first gas source pipe 201 and the second gas source pipe 202 are arranged at the bottom of the fire detection sleeve 101 and are located at the rear middle section of the fire detection sleeve; the outer walls of the first gas source pipe 201 and the second gas source pipe 202 are both provided with a plurality of exhaust grooves 201a.

[0037] Furthermore, the exhaust groove 201a is arranged in a spiral shape, and the spiral ascending direction of the exhaust groove 201a is located on the side facing the boiler, that is, on the side of the principle fire detection probe 102. When the external gas source is started, the gas source passes through the first gas source pipe 201 or the second gas source pipe 202, blows forward along the direction of the exhaust groove 201a, and gives the cyclone a tendency to diffuse spirally outward, thereby compensating for the problem of coal ash accumulation inside the fire detection sleeve 101 due to the low cooling air pressure of the air duct 103.

[0038] The interior of the fire detection sleeve 101 is also connected to an air duct 103 , and an imaging device 203 is arranged inside the fire detection sleeve 101 .

[0039] Furthermore, one end of the air duct 103 is connected to a cooling air source, and the cooling air source clears the dust accumulated in the fire detection sleeve 101 through the air duct 103 .

[0040] Preferably, the air duct 103 is located at the rear of the first air source pipe 201 and the second air source pipe 202, that is, the connection point between the air duct 103 and the fire detection sleeve 101 is located at the rear of the first air source pipe 201 and the second air source pipe 202. When the cooling air source works together with the first air source pipe 201 or the second air source pipe 202, the wind force inside the fire detection sleeve 101 is increased at the same time, and the miscellaneous air sources externally connected to the first air source pipe 201 and the second air source pipe 202 are cooled, thereby reducing the internal temperature of the fire detection sleeve 101.

[0041] A through hole 204a is provided inside the fire detection sleeve 101, and a capillary 204 is movably provided inside the through hole 204a.

[0042] Furthermore, the size of the through hole 204a is larger than the radius of the first gas source tube 201 and the second gas source tube 202, and the two gas source tubes are installed inside the flame detection sleeve 101 through the through hole 204a;

[0043] Preferably, the capillary tube 204 connected inside the through hole 204a is connected to an external miscellaneous air source, and there are two capillary tubes 204 in total, which are respectively connected to the first air source tube 201 and the second air source tube 202. The capillary tube 204 connected to the first air source tube 201 is provided with a solenoid valve and a time relay, and a needle valve is welded on the mother pipe of the miscellaneous air source. An air source filter is installed after the needle valve, and the filter head pressure is adjusted to 0.3 MPa; the time relay and the solenoid valve are connected after the filter; the capillary tube 204 connected to the second air source tube 202 is only provided with a solenoid valve, the solenoid valve.

[0044] The first gas source tube 201 and the second gas source tube 202 are connected to a joint 201b at one end close to the fire detection probe 101. The joint 201b is also connected to a thin tube 204. The other end of the thin tube 204 is connected to a miscellaneous gas source.

[0045] A gravity sensor module 205 is also provided inside the fire detection sleeve 101 . A time relay and a solenoid valve are connected to the first gas source pipe 201 , and a solenoid valve is also connected to the second gas source pipe 202 .

[0046] In summary, when the fire detection device is operating normally, that is, when the fire detection intensity of the fire detection probe 102 is not lower than the threshold value, the time relay controls the electromagnetic valve connected to the first gas source pipe 201, so that the first gas source pipe 201 is blown once every four hours, each time for 60 seconds. The first gas source pipe 201 and the second gas source pipe 202 for blowing away the accumulated dust are connected to the capillary 204 with a special joint; the gas source is turned on to blow the dust off the fire detection probe regularly, so as to ensure that the fire detection probe can better receive the flame signal and ensure the safe operation of the fire detection system.

[0047] Example 2, reference Figure 1 to Figure 5 , which is the second embodiment of the present invention, further provides a fire detection and ash cleaning device. It includes real-time detection of whether the fire detection intensity inside the boiler is less than a threshold value through the fire detection probe 102;

[0048] If so, it is determined whether there is ash in the fire detection sleeve 101 by the imaging device 205;

[0049] If yes, it is determined whether the gravity sensor 205 is activated at this time;

[0050] If so, the solenoid valve connected to the second gas source pipe 202 is started to clean the fire detection sleeve 101.

[0051] Furthermore, in the prior art, when the fire detection probe 102 cannot detect the flame inside the boiler, it is usually directly considered that there is too much coal ash accumulated inside the fire detection sleeve 101. When inspecting the coal ash inside the fire detection sleeve 101, the fire detection sleeve 101 is usually directly disassembled. The present invention uses the imaging device 205 to take a picture of the inside of the fire detection sleeve 101 and upload the picture to the control terminal. The system identifies whether there is too much coal ash accumulated inside the fire detection sleeve. When there is too much coal ash, the gravity sensor 205 is started, which means that the fire detection probe 102 alarms because of the excessive accumulation of coal ash inside the fire detection sleeve 101. At this time, it means that the wind force blown by the air duct 103 and the first air source pipe 201 is still too small to remove the accumulated ash inside the fire detection sleeve 101. At this time, the solenoid valve connected to the second air source pipe 202 is started to increase the cleaning wind force in the fire detection sleeve 101, so that the filtration returns to normal working state.

[0052] Determine whether there is ash in the fire detection sleeve 101 by using the imaging device 205;

[0053] If not, determine whether there is fire inside the boiler at this time;

[0054] If yes, adjust the air flow of the boiler;

[0055] If not, re-ignite the boiler.

[0056] Furthermore, when the terminal device cannot identify the dust accumulation inside the fire detection sleeve 101 through the image uploaded by the image device 203, it is necessary to further determine the state of the boiler at this time, that is, whether the flame inside the boiler still exists;

[0057] At this time, there are two states inside the boiler. When there is still flame inside the boiler and the fire detection intensity is still less than the threshold, it means that although there is flame inside the boiler, it is insufficient. At this time, the crew needs to notify other staff to modify the air regulating device for mixing coal powder inside the boiler, change the air supply angle at this time, and restore the fireball position to the center of the boiler furnace, which is convenient for the fire detection probe to detect;

[0058] In addition, when there is no flame directly inside the boiler furnace, the boiler needs to be re-ignited to ensure the normal operation of the boiler.

[0059] Determine whether the gravity sensor 205 is activated at this time;

[0060] If not, then there are other problems inside the boiler at this time, and the boiler should be re-inspected.

[0061] Furthermore, when the fire detection intensity detected by the fire detection probe 102 is less than the threshold value, and there is dust accumulation inside the fire detection sleeve 101, but the existing dust accumulation inside the fire detection sleeve 101 does not affect the normal detection of the fire detection probe 101, the fire detection probe 102 is still alarming, then it means that there is a problem with the fire detection probe 102 at this time, or a new problem has occurred in the entire boiler system, and the maintenance team personnel need to further check the boiler system.

[0062] The fire detection probe 102 detects in real time whether the fire detection intensity inside the boiler is less than a threshold value;

[0063] If not, the device is operating normally.

[0064] Normal operation includes intermittently controlling the opening or closing of the electromagnetic valve connected to the first gas source pipe 201 by the time relay, and regularly purging the inside of the fire detection sleeve 101.

[0065] In summary, when the fire detection intensity is greater than the threshold, the boiler system, including the fire detection device, is in normal operation. The cooling air source of the air duct 103 continuously supplies air to the inside of the fire detection sleeve 101 to blow away soot, and the time relay controls the solenoid valve connected to the first air source pipe 201 to operate, so that the first air source pipe 201 blows once every four hours, and each time for 60 seconds to clean the inside of the fire detection sleeve 101, to make up for the problem of too low cooling air source of the air duct 103, and ensure the normal operation of the boiler system and the fire detection device.

[0066] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0067] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0068] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0069] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A fire detection and cleaning device, characterized in that: include, A fire detection assembly (100) comprises a fire detection probe (102) and a fire detection sleeve (101) sleeved on one side of the fire detection probe (102); A dust cleaning component (200) comprises a first gas source pipe (201) and a second gas source pipe (202) movably arranged inside the fire detection sleeve (101); Wherein, the outer walls of the first gas source pipe (201) and the second gas source pipe (202) are provided with a plurality of spirally forward-facing exhaust grooves (201a).

2. The fire detection and cleaning device according to claim 1, characterized in that: The fire detection sleeve (101) is also internally connected to an air duct (103), and an imaging device (203) is arranged inside the fire detection sleeve (101).

3. The fire detection and cleaning device according to claim 2, characterized in that: A through hole (204a) is provided inside the fire detection sleeve (101), and a capillary tube (204) is movably arranged inside the through hole (204a).

4. The fire detection and cleaning device according to claim 3, characterized in that: The first gas source tube (201) and the second gas source tube (202) are connected with a joint (201b) at one end close to the fire detection probe (101), and the joint (201b) is also connected to the capillary tube (204), and the other end of the capillary tube (204) is connected with a miscellaneous gas source.

5. The fire detection and cleaning device according to claim 4, characterized in that: A gravity sensor module (205) is also arranged inside the fire detection sleeve (101); a time relay and a solenoid valve are connected to the first gas source pipe (201); and a solenoid valve is also connected to the second gas source pipe (202).

6. A fire detection and cleaning method, characterized in that: It comprises the fire detection and cleaning device according to any one of claims 1 to 5; as well as Real-time detection of whether the fire detection intensity inside the boiler is less than a threshold value is performed by the fire detection probe (102); If yes, judging whether there is ash in the fire detection sleeve (101) by the imaging device (205); If yes, then determine whether the gravity sensor (205) is activated at this time; If so, the solenoid valve connected to the second gas source pipe (202) is started to clean the fire detection sleeve (101).

7. The fire detection and cleaning method according to claim 6, characterized in that: judging whether there is ash in the fire detection sleeve (101) by means of the imaging device (205); If not, determine whether there is fire inside the boiler at this time; If yes, adjust the air flow of the boiler; If not, re-ignite the boiler.

8. The fire detection and cleaning method according to claim 7, characterized in that: Determine whether the gravity sensor (205) is activated at this time; If not, then there are other problems inside the boiler at this time, and the boiler should be re-inspected.

9. The fire detection and cleaning method according to claim 8, characterized in that: Real-time detection of whether the fire detection intensity inside the boiler is less than a threshold value is performed by the fire detection probe (102); If not, the device is operating normally.

10. The fire detection and cleaning method according to claim 9, characterized in that: The normal operation includes intermittently controlling the opening or closing of the electromagnetic valve connected to the first gas source pipe (201) through the time relay, and regularly purging the inside of the fire detection sleeve (101).

Images