Automatic decoking device and dry type deslagging system and method

Abstract

The invention relates to the technical field of boiler slag removal, in particular to an automatic decoking device and a dry-type slag removal system and method.The automatic decoking device comprises a hydraulic shutoff door used for decoking and arranged above a large coke intercepting hole; the infrared detector is used for detecting whether solid substances exist or not; the infrared detector protective cover is used for protecting the infrared detector; the hydraulic oil pump is used for controlling opening and closing of the hydraulic shut-off door, when the infrared detector detects that coke accumulation exists, the hydraulic oil pump controls the hydraulic shut-off door to conduct opening and closing operation and reciprocating coke extrusion, automatic coke extrusion and decoking operation can be achieved conveniently, the operation reliability of the dry type slag removal system is greatly improved, manual starting of the hydraulic oil pump is avoided, and the operation efficiency is improved. And manpower is liberated, so that the safety of the unit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of boiler deslagging, in particular to an automatic decoking device and a dry deslagging system and method. Background Art

[0002] At present, the dry deslagging system of the boiler in the thermal power plant uses a hydraulic shut-off door to remove coke, and the following problems exist: 1. When a large piece of coke falls on the large coke interception hole, it is necessary to manually start the hydraulic oil pump and manually open and close the hydraulic shut-off door on the CRT to remove coke. This is a special operation and wastes manpower; 2. The dry deslagging system is equipped with a camera on site. During operation, the camera is used to observe the coke accumulation and manually open and close the hydraulic shut-off door to remove coke. Due to the blind spots of the camera, a large amount of coke will accumulate in some places that are not easy to observe, which poses a great risk to the safe operation of the deslagging system and the boiler.

[0003] To this end, the present invention provides an automatic decoking device and a dry slag removal system and method. Summary of the invention

[0004] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0005] Therefore, an object of the present invention is to provide an automatic decoking device and a dry slag removal system and method.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic decoking device, comprising:

[0007] A hydraulic shut-off door, which is used for decoking and is located above the large coke interception hole;

[0008] Infrared detectors, which are used to detect the presence of solid matter;

[0009] Infrared detector protective cover, which is used to protect the infrared detector;

[0010] A hydraulic oil pump is used to control the opening and closing of the hydraulic shut-off door.

[0011] As a preferred solution of the automatic decoking device of the present invention, a plurality of hydraulic shut-off doors are arranged in a horizontal array.

[0012] As a preferred solution of the automatic decoking device of the present invention, the infrared detectors are arranged on both sides of the hydraulic shut-off door.

[0013] The beneficial effects of the automatic decoking device of the present invention are as follows: when the infrared detector detects the presence of coke accumulation, the hydraulic shut-off door is controlled by the hydraulic oil pump to open and close, and the coke is squeezed back and forth in a cycle, which facilitates the automatic coke squeezing and decoking operations, greatly improves the reliability of the dry slag removal system, avoids manual start-up of the hydraulic oil pump, liberates manpower, and thus improves the safety of the unit.

[0014] In order to solve the above technical problems, the present invention also provides the following technical solutions: a dry slag removal system, comprising the automatic decoking device, and:

[0015] An alarm module, which is used to issue an alarm for coke accumulation above the boiler's large coke interception hole;

[0016] The control module controls the start-up of the hydraulic oil pump according to the alarm instruction issued by the alarm module.

[0017] As a preferred solution of the dry slag removal system of the present invention, the data detected by the infrared detector is transmitted to the control module, and the alarm module is used to determine whether to perform the decoking operation.

[0018] As a preferred solution of the dry slag removal system of the present invention, during the decoking operation, after the hydraulic oil pump is started, the hydraulic shut-off door is opened and closed reciprocatingly to squeeze the coke in a back-and-forth cycle.

[0019] The beneficial effect of the dry slag removal system of the present invention is that when the alarm module issues an alarm of "coke accumulation above the boiler large coke interception hole", the monitoring personnel can promptly find that the hydraulic oil pump of the dry slag removal system is automatically started. The hydraulic shut-off door at the corresponding coke accumulation location is opened and closed to squeeze the coke, which is convenient for realizing the automatic coke squeezing operation.

[0020] In order to solve the above technical problems, the present invention also provides the following technical solutions: an automatic decoking method for a dry slag removal system, applied to the dry slag removal system, comprising:

[0021] Infrared detectors detect whether there is focus accumulation in real time;

[0022] The alarm module issues a coke accumulation alarm;

[0023] Determine the coke accumulation location, and the control module sends a command to start the hydraulic oil pump;

[0024] Start the hydraulic shut-off door at the coke accumulation area to decoke;

[0025] After the alarm disappears, stop the hydraulic oil pump.

[0026] As a preferred solution of the automatic decoking method of the dry slag removal system of the present invention, when the infrared detector sends a signal, the control module determines whether the infrared detector adjacent to the infrared detector sending the signal sends a signal;

[0027] If the adjacent infrared detector does not send a signal, it is considered a false alarm;

[0028] If the adjacent infrared detector sends a signal, the alarm module will issue a focus alarm.

[0029] As a preferred solution of the automatic decoking method of the dry slag removal system of the present invention, after the coke accumulation alarm is issued, the control module determines whether the hydraulic oil pump is started. If the hydraulic oil pump is not started, an instruction to start the hydraulic oil pump is issued.

[0030] As a preferred solution of the automatic decoking method of the dry slag removal system of the present invention, when the infrared detector does not identify the coke accumulation during the decoking process, it is determined that the decoking is completed, the alarm module stops sounding the alarm, and the hydraulic oil pump stops.

[0031] The beneficial effects of the automatic decoking method of the dry slag removal system of the present invention are as follows: the method can improve the accuracy of detection and the decoking effect, thereby improving the safety of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 It is the overall schematic diagram of the automatic decoking device.

[0034] Figure 2 Schematic diagram of the process framework of the automatic decoking method of the dry slag removal system. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Example 1, reference Figure 1 , which is the first embodiment of the present invention, provides an automatic defocusing device, comprising:

[0039] A hydraulic shut-off door 1, which is used for decoking, is arranged above the large coke interception hole; specifically, a plurality of hydraulic shut-off doors 1 are arranged in a horizontal array; in this embodiment, the hydraulic shut-off doors 1 are installed above the large coke interception hole of the boiler deslagging system, with a total of 10 pairs.

[0040] Infrared detectors 2 are arranged on both sides of the hydraulic shut-off door 1 to detect whether there is solid matter. Further, the infrared detectors 2 are arranged on both sides of the hydraulic shut-off door 1. In this embodiment, there are 11 infrared detectors 2 in total, and each infrared detector 2 can detect all areas within the two pairs of hydraulic shut-off doors 1 on both sides.

[0041] The infrared detector protective cover 3 is used to protect the infrared detector 2. In this embodiment, since the installation location of the infrared detector 2 is exposed to high temperature, impact, various pressures, etc., a protective cover that can withstand these harsh environments must be installed to ensure that the infrared detector 2 works normally.

[0042] The hydraulic oil pump 4 is used to control the opening and closing of the hydraulic shut-off door 1 .

[0043] During use, when the infrared detector 2 detects the presence of coke accumulation, the hydraulic shut-off door 1 is opened and closed by the hydraulic oil pump 4 to circulate the coke back and forth. When the infrared detector 2 detects no solid matter, the hydraulic shut-off door 1 remains open and the dry slag removal system hydraulic oil pump 4 stops operating.

[0044] In summary, it is easy to realize automatic coke squeezing and decoking operations, greatly improves the reliability of the dry slag removal system, avoids manual start of the hydraulic oil pump, liberates manpower, and thus improves the safety of the unit.

[0045] Example 2, reference Figure 1-2 , which is the second embodiment of the present invention, is different from the previous embodiment in that this embodiment provides a dry slag removal system, including an automatic decoking device, and,

[0046] An alarm module, which is used to issue an alarm for coke accumulation above the boiler's large coke interception hole;

[0047] The control module controls the hydraulic oil pump 4 to start according to the alarm instruction issued by the alarm module.

[0048] Specifically, the data detected by the infrared detector 2 is transmitted to the control module, and the alarm module determines whether to perform the decoking operation. In this embodiment, the data detected by the infrared detector 2 is transmitted through the Internet.

[0049] Furthermore, during the decoking operation, after the hydraulic oil pump 4 is started, the hydraulic shut-off door 1 is opened and closed reciprocatingly, and the coke is squeezed in a back-and-forth cycle.

[0050] The rest of the structure is the same as that of Example 1.

[0051] When in use, when the alarm module issues an alarm of "coke accumulation above the boiler's large coke interception hole", the monitoring personnel can promptly discover that the hydraulic oil pump 4 of the dry slag removal system is automatically started. The hydraulic shut-off door 1 at the corresponding coke accumulation location is opened and closed to squeeze coke. When the alarm of "coke accumulation above the boiler's large coke interception hole" is issued, the hydraulic oil pump 4 is automatically started, the hydraulic shut-off door 1 at the corresponding coke accumulation location is closed, and then opened, and the coke is squeezed in a cycle. When all the coke is removed, the hydraulic shut-off door 1 remains open, and the hydraulic oil pump 4 stops running.

[0052] In summary, it is convenient to realize automatic focus squeezing operation.

[0053] Example 3, reference Figure 1-2 , which is the third embodiment of the present invention, is different from the previous embodiment in that this embodiment provides an automatic decoking method for a dry slag removal system, which is applied to the dry slag removal system, and includes:

[0054] Infrared detector 2 detects whether there is coke accumulation in real time;

[0055] The alarm module issues a coke accumulation alarm;

[0056] After judging the coke accumulation position, the control module issues a command to start the hydraulic oil pump 4;

[0057] Start the hydraulic shut-off door 1 at the coke accumulation location to decoke;

[0058] After the alarm disappears, stop the hydraulic oil pump 4.

[0059] In this embodiment, according to the coke accumulation position, the hydraulic shut-off door 1 at the corresponding position is activated to perform decoking, which can improve the decoking effect.

[0060] Specifically, when the infrared detector 2 sends a signal, the control module determines whether the infrared detector 2 adjacent to the infrared detector 2 sending the signal sends a signal;

[0061] If the adjacent infrared detector 2 does not send a signal, it is determined to be a false alarm;

[0062] If the adjacent infrared detector 2 sends a signal, the alarm module will send out a focus alarm.

[0063] In this embodiment, the detection accuracy can be improved by the cooperation of the two infrared detectors 2 .

[0064] Furthermore, after the coke accumulation alarm is issued, the control module determines whether the hydraulic oil pump 4 is started. If the hydraulic oil pump 4 is not started, an instruction to start the hydraulic oil pump 4 is issued. In the present embodiment, if the monitoring personnel starts the hydraulic oil pump 4 in advance, no start instruction will be issued after the subsequent coke accumulation alarm is issued. If the hydraulic oil pump 4 is not started at this time, an instruction to start the hydraulic oil pump 4 is issued to ensure that the hydraulic oil pump 4 can be started in time when decoking occurs.

[0065] During the decoking process, when the infrared detector 2 does not identify coke accumulation, it is determined that the decoking is complete, the alarm module stops sounding the alarm, and the hydraulic oil pump 4 stops.

[0066] The rest of the structure is the same as that of Example 2.

[0067] When in use, first, more than one infrared detector 2 detects coke and sends a signal. The system determines that if it is the adjacent infrared detector 2 that sends the signal, it means that there is coke above the large coke interception hole, and sends out an alarm of "coke accumulation above the large coke interception hole of the boiler". Otherwise, it is a false alarm and the system does not take any action. The corresponding shut-off door of the adjacent infrared detector 2 that sends the signal is the coke accumulation shut-off door. At this time, the system remotely sequentially starts the hydraulic oil pump 4. If the hydraulic oil pump 4 is already running, this operation will not be performed. The coke accumulation shut-off door is closed, and then the hydraulic shut-off door 1 is opened. The infrared detector 2 continues to determine whether there is coke accumulation above the large coke interception hole of the boiler. The above procedure is repeated for decoking until the infrared detector 2 can no longer detect coke and the alarm of "coke accumulation above the large coke interception hole of the boiler" disappears. The hydraulic oil pump 4 is stopped and decoking is completed. The operation process is as follows: Figure 2 shown.

[0068] In summary, the dry slag removal system of the thermal power plant boiler adopts a more scientific and reasonable remote automatic start of the hydraulic shut-off door 1 for decoking, which will greatly improve the reliability of the operation of the dry slag removal system, avoid manual start of the hydraulic oil pump 4, solve the problem of manual switch of the hydraulic shut-off door 1 for decoking, liberate manpower, and thus improve the safety of the unit.

[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 may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automatic decoking device, characterized in that: include, A hydraulic shut-off door (1), which is used for decoking and is arranged above the large coke interception hole; an infrared detector (2) for detecting the presence of solid matter; An infrared detector protective cover (3), which is used to protect the infrared detector (2); A hydraulic oil pump (4) is used to control the opening and closing of the hydraulic shut-off door (1).

2. The automatic decoking device according to claim 1, characterized in that: The hydraulic shut-off doors (1) are arranged in a plurality in a horizontal array.

3. The automatic decoking device according to claim 1 or 2, characterized in that: The infrared detectors (2) are arranged on both sides of the hydraulic shutoff door (1).

4. A dry slag removal system, characterized in that: The automatic decoking device comprises any one of claims 1 to 3, and An alarm module, which is used to issue an alarm for coke accumulation above the boiler's large coke interception hole; A control module controls the hydraulic oil pump (4) to start according to the alarm instruction issued by the alarm module.

5. The dry slag removal system according to claim 4, characterized in that: The data detected by the infrared detector (2) is transmitted to the control module, and the alarm module determines whether to perform a decoking operation.

6. The dry slag removal system according to claim 5, characterized in that: During the decoking operation, after the hydraulic oil pump (4) is started, the hydraulic shut-off door (1) is opened and closed reciprocatingly to squeeze the coke in a back-and-forth cycle.

7. An automatic decoking method for a dry slag removal system, applied to the dry slag removal system according to any one of claims 4 to 6, characterized in that: include, The infrared detector (2) detects in real time whether there is any focus accumulation; The alarm module issues a coke accumulation alarm; After determining the coke accumulation location, the control module issues a command to start the hydraulic oil pump (4); Actuating the hydraulic shut-off door (1) at the coke accumulation location to remove the coke; After the alarm disappears, stop the hydraulic oil pump (4).

8. The automatic decoking method of a dry slag removal system according to claim 7, characterized in that: When the infrared detector (2) sends a signal, the control module determines whether an infrared detector (2) adjacent to the infrared detector (2) sending the signal sends a signal; If the adjacent infrared detector (2) does not send out a signal, it is determined to be a false alarm; If the adjacent infrared detector (2) sends a signal, the alarm module will send out a focus alarm.

9. The automatic decoking method of a dry slag removal system according to claim 8, characterized in that: After the coke accumulation alarm is issued, the control module determines whether the hydraulic oil pump (4) is started, and if the hydraulic oil pump (4) is not started, an instruction to start the hydraulic oil pump (4) is issued.

10. The automatic decoking method of a dry slag removal system according to claim 8 or 9, characterized in that: During the decoking process, when the infrared detector (2) does not identify coke accumulation, it is determined that the decoking is complete, the alarm module stops sounding the alarm, and the hydraulic oil pump (4) stops.

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