A full-automatic purging system and purging method for a pressure sampling hole of a boiler system

Abstract

The application discloses a kind of pressure sampling hole full-automatic purging system and method of boiler system, system includes control component, shell component, pressure sampling component, light sensing detection component, differential pressure detection component and purging component;One end of pressure sampling component is located in the middle of shell component, for measuring the pressure in pressure sampling channel;Light sensing detection component is located in the middle of shell component, for measuring the light intensity in pressure sampling channel;The high-pressure sampling end of differential pressure detection component is communicated with the boiler body, the low-pressure sampling end of differential pressure detection component is communicated with pressure sampling component, purging component is located in the other end of shell component, for purging operation to pressure sampling hole;Control component is used to control the opening and closing of purging component according to the light intensity detection value of light sensing detection component or / and the pressure difference between the high-pressure sampling end and the low-pressure sampling end of differential pressure detection component.The application has the advantages of high degree of automation.

Description

TECHNICAL FIELD

[0001] The present application mainly relates to the technical field of boiler, in particular to a full-automatic purging system and purging method for pressure sampling hole of boiler system. BACKGROUND

[0002] During long-term operation of the boiler, urea, leachate and the like are sprayed into the boiler due to working conditions and other aspects, and a large amount of ash, water vapor, other suspended or fixed sundries and the like are generated in the boiler after incineration, thereby causing the sampling holes for monitoring the boiler furnace, flue and pipeline with suspended matters, negative pressure, differential pressure and pressure to be blocked (the sampling holes are blocked by a large amount of floating matters in the boiler), resulting in that the pressure measuring points cannot accurately reflect the operation of the boiler (the boiler needs to be operated in a specified pressure state), and affecting the judgment of the working conditions by the operation personnel, and the conventional sampling system on site cannot efficiently and quickly deal with the blocking of the sampling holes during operation of the boiler, so that the boiler furnace pressure cannot be normally used after being blocked, the measuring point protection is lost, and the safe operation of the furnace is affected. In order to prevent the sampling holes from being blocked and affecting the operation, manual cleaning needs to be performed every month or half a month at present, which greatly increases the labor cost and time cost (the number of negative pressure / differential pressure / pressure measuring points of the furnace and flue of the waste incineration boiler is hundreds), and the use of manual cleaning also increases the risk (such as wrong boiler and wrong measuring point, etc.).

[0003] In view of the above technical problems, the patent applicant designs a purging device, which purges the sampling hole by high pressure through the setting of a purging assembly. However, the above purging device still has the following disadvantages in specific application: manual judgment of whether the sampling hole is blocked is still needed, and then purging is performed, which wastes manpower; if a timing purging or the like is adopted, the pressure measuring point cannot accurately reflect the operation of the boiler in the case that the sampling hole is blocked and the purging is not complete, which affects the judgment of the working conditions by the operation personnel (the operation personnel mistakenly judges that the pressure measuring point is normal after purging, and thus mistakenly judges that the boiler is abnormal), and affects the safe operation of the furnace. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a full-automatic purging system and purging method for pressure sampling hole of boiler system with high automation degree in view of the technical problems existing in the prior art.

[0005] To solve the above technical problems, the technical solution provided by the present application is as follows:

[0006] The application discloses a full-automatic purging system for a pressure sampling hole of a boiler system, which comprises a control assembly, a shell assembly, a pressure sampling assembly, a light sensing detection assembly, a pressure difference detection assembly and a purging assembly; the inside of the shell assembly is formed with a pressure sampling channel communicated with the pressure sampling hole; one end of the pressure sampling assembly is located at the middle part of the shell assembly and used for measuring the pressure in the pressure sampling channel; the light sensing detection assembly is located at the middle part of the shell assembly and used for measuring the light brightness in the pressure sampling channel; the high-pressure sampling end of the pressure difference detection assembly is communicated with the boiler body, the low-pressure sampling end of the pressure difference detection assembly is communicated with the pressure sampling assembly, and the purging assembly is located at the other end of the shell assembly and used for purging the pressure sampling hole; the control assembly is connected with the pressure sampling assembly, the light sensing detection assembly, the pressure difference detection assembly and the purging assembly respectively, and used for controlling the opening and closing of the purging assembly according to the light brightness detection value of the light sensing detection assembly and / or the pressure difference between the high-pressure sampling end and the low-pressure sampling end of the pressure difference detection assembly.

[0007] As a further improvement of the above technical solution:

[0008] The pressure difference detection assembly comprises a pressure difference sensor, the high-pressure sampling end of the pressure difference sensor is communicated with the boiler body through a high-pressure sampling pipe, and the low-pressure sampling end of the pressure difference sensor is communicated with the pressure sampling assembly through a low-pressure sampling pipe.

[0009] The purging assembly is provided with a purging branch pipe between the purging assembly and the high-pressure sampling pipe, which is used for purging the high-pressure sampling pipe to prevent the high-pressure sampling pipe from being blocked.

[0010] The light sensing detection assembly is a light sensing sensor.

[0011] The shell assembly comprises an outer shell and an inner shell, the outer shell is welded on the reserved sampling hole of the boiler, the inner shell is sleeved in the inside of the outer shell, a cavity is formed between the outer shell and the inner shell, and the inside of the inner shell is the pressure sampling channel; one end of the outer shell is provided with a visual window, and the visual window is provided with glass.

[0012] The purging assembly comprises a purging pipe, a purging valve and a gas guide groove, the gas guide groove is located at the other end of the shell assembly, welded in the inside of the outer shell and welded with the end part of the inner shell, the gas guide groove is provided with purging holes, one end of the purging pipe is located outside the outer shell, the other end of the purging pipe extends into the cavity and is communicated with the gas guide groove, and the purging valve is located on the purging pipe.

[0013] The gas guide groove is provided with a plurality of groups of purging holes, one group of the purging holes is in the same direction as the axial direction of the inner shell, the other group of the purging holes is at a certain angle with the axial direction of the inner shell, and the purging directions of the two groups of the purging holes are both towards the axial center position of the inner shell.

[0014] The pressure sampling assembly comprises a sampling pipe and a sampling valve, one end of the sampling pipe is connected to a measuring gauge, the other end of the sampling pipe extends into a pressure sampling channel of the shell assembly, and the sampling valve is located on the sampling pipe.

[0015] The application further discloses a blowing method of the full-automatic blowing system of the pressure sampling hole of the boiler system.

[0016] The light sensing detection assembly measures the light brightness in the pressure sampling channel to obtain a light brightness detection value.

[0017] The differential pressure detection assembly obtains a differential pressure value according to the pressures of the high-pressure sampling end and the low-pressure sampling end.

[0018] The control assembly controls the opening and closing of the blowing assembly according to the light brightness detection value or / and the differential pressure value.

[0019] As a further improvement of the above technical solution:

[0020] The specific process in which the control assembly controls the opening and closing of the blowing assembly according to the light brightness detection value or / and the differential pressure value is as follows: when the light brightness detection value is lower than a first preset threshold value or / and the differential pressure value is greater than a second preset threshold value, it is judged that the pressure sampling hole is blocked, at this time, the blowing assembly is started to perform blowing work on the pressure sampling hole until the light brightness detection value is within the first preset threshold value and the differential pressure value is within the second preset threshold value.

[0021] Compared with the prior art, the application has the following advantages:

[0022] The full-automatic blowing system of the pressure sampling hole of the boiler system detects the light brightness in the pressure sampling channel through the light sensing detection assembly, detects the differential pressure between the inside of the boiler body and the pressure sampling channel through the differential pressure detection assembly, and comprehensively judges whether the pressure sampling hole is blocked according to the light brightness and the differential pressure (when the pressure sampling hole is blocked, there is no light or the light is dark in the pressure sampling channel, and the differential pressure between the pressure in the pressure sampling channel and the pressure in the inside of the boiler body (the pressure in the inside of the boiler body is in a long-term negative pressure state) becomes large), thereby ensuring the accuracy and reliability of the judgment; further, when it is judged that the corresponding pressure sampling hole is blocked, the cleaning assembly is automatically started to automatically clean the pressure sampling hole, the above process does not need manual intervention, the degree of automation is high, the labor cost and the time cost are reduced, the work efficiency is greatly improved, and the continuous safe and stable operation of the boiler is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is one of the three-dimensional structure diagrams of the blowing system in the embodiment of the application.

[0024] Figure 2 Fig. 2 is a perspective view of the purge system of the present application in an embodiment.

[0025] Figure 3 Fig. 3 is a perspective view of the purge system of the present application in an embodiment (without the outer shell, etc.).

[0026] Figure 4 Fig. 4 is a perspective view of the purge system of the present application in an embodiment (without the outer shell, etc.).

[0027] Figure 5 Fig. 5 is a control block diagram of the purge system of the present application in an embodiment.

[0028] Figure 6 Fig. 6 is a flow chart of the purge method of the present application in an embodiment.

[0029] Legend: 1, housing assembly; 11, outer shell; 12, inner shell; 2, pressure sampling assembly; 21, sampling tube; 22, sampling valve; 3, visual assembly; 31, visual window; 32, glass; 4, purge assembly; 41, purge tube; 42, purge valve; 43, air guide groove; 44, purge hole; 5, light sensing detection assembly; 6, differential pressure detection assembly; 61, differential pressure sensor; 62, purge branch; 63, purge branch valve; 64, quick connector; 65, high pressure sampling tube; 66, low pressure sampling tube; 7, control assembly. DETAILED DESCRIPTION

[0030] The present application is further described by the following description and examples with reference to the accompanying drawings, in which:

[0031] As Figures 1-5As shown, the full-automatic purging system for pressure sampling hole of boiler system provided by the embodiment of the present application is used for purging the negative pressure, differential pressure and pressure sampling hole on the boiler furnace or flue, and the specific structure comprises a control assembly 7 (such as a controller), a shell assembly 1, a pressure sampling assembly 2, a light sensing detection assembly 5 (such as a light sensing sensor and the like), a differential pressure detection assembly 6 and a purging assembly 4; the inside of the shell assembly 1 forms a pressure sampling channel which is communicated with the pressure sampling hole; one end of the pressure sampling assembly 2 is located at the middle part of the shell assembly 1, and is used for measuring the pressure in the pressure sampling channel; the light sensing detection assembly 5 is located at the middle part of the shell assembly 1, and is used for measuring the light brightness (the firelight of the boiler) in the pressure sampling channel; the high-pressure sampling end of the differential pressure detection assembly 6 is communicated with the boiler body, the low-pressure sampling end of the differential pressure detection assembly 6 is communicated with the pressure sampling assembly 2, and the purging assembly 4 is located at the other end of the shell assembly 1, and is used for purging the pressure sampling hole; the control assembly 7 is connected with the pressure sampling assembly 2, the light sensing detection assembly 5, the differential pressure detection assembly 6 and the purging assembly 4 respectively, and is used for controlling the opening and closing of the purging assembly 4 according to the light brightness detection value of the light sensing detection assembly 5 or / and the pressure difference between the high-pressure sampling end and the low-pressure sampling end of the differential pressure detection assembly 6.

[0032] The full-automatic purging system for pressure sampling hole of boiler system provided by the present application detects the light brightness in the pressure sampling channel through the light sensing detection assembly 5, and detects the pressure difference between the inside of the boiler body and the pressure sampling channel through the differential pressure detection assembly 6, and the control assembly 7 comprehensively judges whether the pressure sampling hole is blocked according to the light brightness and the pressure difference (wherein when the pressure sampling hole is blocked, there is no light or the light is dark in the pressure sampling channel, and the pressure difference between the pressure in the pressure sampling channel and the pressure in the inside of the boiler body (the pressure in the inside of the boiler body is in a long-term negative pressure state) becomes large), so as to guarantee the accuracy and reliability of the judgment; further, when it is judged that the corresponding pressure sampling hole is blocked, the purging assembly 4 is automatically opened to automatically clean the pressure sampling hole at this time, and the above process does not need manual intervention, has high automation degree, reduces the labor cost and time cost, greatly improves the work efficiency and is beneficial to the continuous safe and stable operation of the boiler.

[0033] In a specific embodiment, the pressure sampling assembly 2 comprises a sampling pipe 21 and a sampling valve 22, one end of the sampling pipe 21 is connected to a measuring gauge, the other end of the sampling pipe 21 extends into the pressure sampling channel of the shell assembly 1, and the sampling valve 22 is located on the sampling pipe 21. The sampling valve 22 is a sampling pneumatic ball valve, which has simple structure and is easy to realize.

[0034] In an embodiment, the shell assembly 1 comprises an outer shell 11 and an inner shell 12, the outer shell 11 is welded on the boiler reserved sampling hole, the inner shell 12 is sleeved in the inner part of the outer shell 11, a cavity is formed between the outer shell 11 and the inner shell 12, and the inner part of the inner shell 12 forms a pressure sampling channel. One end of the shell assembly 1 is provided with a visual assembly 3 for manual observation of the plugging of the inside of the pressure sampling hole. Specifically, the visual assembly 3 comprises a visual window 31 (cylindrical, with an outer thread) and a glass 32, the visual window 31 is fastened to one end of the shell assembly 1, and the glass 32 is located on the visual window 31. The visual window 31 is screwed to the inner side of the outer shell 11, which can be conveniently disassembled, and after disassembly, the pressure sampling hole can be manually cleaned.

[0035] In an embodiment, the purging assembly 4 comprises a purging pipe 41, a purging valve 42 (such as a purging pneumatic ball valve) and a circular ring air guide groove 43, the air guide groove 43 is located at the other end of the shell assembly 1, and is welded to the inner part of the outer shell 11 and the end part of the inner shell 12, the air guide groove 43 is provided with purging holes 44, one end of the purging pipe 41 is located outside the outer shell 11 and connected to compressed gas, the other end extends into the cavity and is connected to the air guide groove 43, and the purging valve 42 is located on the purging pipe 41. The air guide groove 43 is provided with at least two groups of purging holes 44, one group of purging holes 44 (such as 6) has the same purging direction as the axial direction of the inner shell 12, and is used for purging the dust around the sampling hole; the other group of purging holes 44 (such as 4) has a certain angle (such as 45 degrees) with the axial direction of the inner shell 12, and all blow to the center position of the inner shell 12, and is used for purging the dust at the middle position of the sampling hole. Through the arrangement of the above two groups of purging holes 44, it can be ensured that the boiler reserved sampling hole is not blocked, and the correct measurement of the subsequent pressure is ensured. Of course, in other embodiments, the above angle can also be determined according to the actual situation. The outer shell 11 and the inner shell 12 of the shell assembly 1 are double-layered, the purging assembly 4 (the purging pipe 41 and the air guide groove 43) is hidden in the cavity, and the pipeline of the purging assembly 4 is arranged cleverly.

[0036] In a specific embodiment, the differential pressure detection assembly 6 comprises a differential pressure sensor 61, the high-pressure sampling end of the differential pressure sensor 61 is communicated with the boiler body through a high-pressure sampling pipe 65, and the low-pressure sampling end of the differential pressure sensor 61 is communicated with the pressure sampling assembly 2 through a low-pressure sampling pipe 66. A purge branch pipe 62 is arranged between the purge pipe 41 and the high-pressure sampling pipe 65, which is used for purging the high-pressure sampling pipe 65 to prevent the high-pressure sampling pipe 65 from being blocked. Specifically, one end of the purge branch pipe 62 is connected to the front end of the purge pipe 41 at the purge valve 42, and the other end of the purge branch pipe 62 is connected with the high-pressure sampling pipe 65 through a quick connector 64, the quick connector 64 extends into the high-pressure sampling pipe 65, and the blowing direction is opposite to the internal direction of the boiler, which ensures the reliability of the blowing. A purge branch valve 63 (such as a purge pneumatic ball valve) is also arranged on the purge branch pipe 62, which is convenient for controlling the blowing operation of the high-pressure sampling pipe 65 (such as a timed blowing operation).

[0037] As shown in Figure 6 The embodiment of the present application also provides a blowing method of the full-automatic blowing system of the pressure sampling hole of the boiler system, which comprises the following steps:

[0038] The light sensing detection assembly 5 measures the light brightness in the pressure sampling channel to obtain a light brightness detection value;

[0039] The differential pressure detection assembly 6 obtains a differential pressure value according to the pressures of the high-pressure sampling end and the low-pressure sampling end;

[0040] The control assembly 7 controls the opening and closing of the blowing assembly 4 according to the light brightness detection value or / and the differential pressure value; specifically, when the light brightness detection value is lower than a first preset threshold or / and the differential pressure value is greater than a second preset threshold, it is judged that the pressure sampling hole is blocked, at this time, the blowing assembly 4 is opened to blow the pressure sampling hole until the light brightness detection value is within the first preset threshold and the differential pressure value is within the second preset threshold.

[0041] The blowing method of the present application will be further described through a specific embodiment as follows:

[0042] Step 1: judging whether the pressure sampling hole is blocked by the light sensing sensor and the differential pressure sensor 61; when the light brightness detection value is lower than a first preset threshold or the differential pressure value is greater than a second preset threshold, it is judged that the pressure sampling hole is blocked, and the automatic blowing operation is entered;

[0043] Step 2: after entering the automatic blowing operation, first close the sampling valve 22 (the sampling valve 22 is in a normally open state during normal operation), then open the blowing valve 42 (the blowing valve 42 is in a normally closed state during normal operation), and then perform automatic blowing;

[0044] Step 3: After a period of time of the automatic purging, when the light brightness detection value is within the first preset threshold value and the pressure difference value is within the second preset threshold value, it is judged that the pressure sampling hole is no longer blocked, the purging is ended, the purging valve 42 is closed, and the sampling valve 22 is opened again; and after a period of time of the automatic purging, the pressure sampling hole is still blocked, at this time, the audible and visual alarm is performed to remind the operator to perform the manual cleaning operation.

[0045] The above is only the preferred embodiment of the present application, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme belonging to the idea of the present application is within the protection scope of the present application. It should be pointed out that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application should be considered as the protection scope of the present application.

Claims

1. A full automatic purging system for a pressure tapping hole of a boiler system, characterized in that, The application relates to a boiler pressure sampling device, which comprises a control assembly (7), a shell assembly (1), a pressure sampling assembly (2), a light-sensing detection assembly (5), a differential pressure detection assembly (6) and a blowing assembly (4); the inside of the shell assembly (1) is provided with a pressure sampling channel which is communicated with a pressure sampling hole; one end of the pressure sampling assembly (2) is located in the middle of the shell assembly (1) and is used for measuring the pressure in the pressure sampling channel; the light-sensing detection assembly (5) is located in the middle of the shell assembly (1) and is used for measuring the light brightness in the pressure sampling channel; the high-pressure sampling end of the differential pressure detection assembly (6) is communicated with a boiler body, the low-pressure sampling end of the differential pressure detection assembly (6) is communicated with the pressure sampling assembly (2), the blowing assembly (4) is located at the other end of the shell assembly (1) and is used for blowing the pressure sampling hole; the control assembly (7) is connected with the pressure sampling assembly (2), the light-sensing detection assembly (5), the differential pressure detection assembly (6) and the blowing assembly (4) respectively, and is used for controlling the opening and closing of the blowing assembly (4) according to the light brightness detection value of the light-sensing detection assembly (5) and the pressure difference between the high-pressure sampling end and the low-pressure sampling end of the differential pressure detection assembly (6). The differential pressure detection assembly (6) comprises a differential pressure sensor (61), the high-pressure sampling end of the differential pressure sensor (61) is communicated with the boiler body through a high-pressure sampling pipe (65), and the low-pressure sampling end of the differential pressure sensor (61) is communicated with the pressure sampling assembly (2) through a low-pressure sampling pipe (66). A blowing branch pipe (62) is arranged between the blowing assembly (4) and the high-pressure sampling pipe (65) and is used for blowing the high-pressure sampling pipe (65) to prevent the high-pressure sampling pipe (65) from being blocked. The shell assembly (1) comprises an outer shell (11) and an inner shell (12), the outer shell (11) is welded on a boiler reserved sampling hole, the inner shell (12) is sleeved in the inner part of the outer shell (11), a cavity is formed between the outer shell (11) and the inner shell (12), and the inner part of the inner shell (12) is the pressure sampling channel; one end of the outer shell (11) is provided with a visual window (31), and the visual window (31) is provided with a glass (32). The blowing assembly (4) comprises a blowing pipe (41), a blowing valve (42) and a gas guide groove (43), the gas guide groove (43) is located at the other end of the shell assembly (1), is welded in the inner part of the outer shell (11) and is welded with the end part of the inner shell (12), the gas guide groove (43) is provided with a blowing hole (44), one end of the blowing pipe (41) is located outside the outer shell (11), the other end of the blowing pipe (41) extends into the cavity and is communicated with the gas guide groove (43), and the blowing valve (42) is located on the blowing pipe (41). The pressure sampling assembly (2) comprises a sampling pipe (21) and a sampling valve (22), one end of the sampling pipe (21) is connected to a measuring meter, the other end of the sampling pipe (21) extends into the pressure sampling channel of the shell assembly (1), and the sampling valve (22) is located on the sampling pipe (21).

2. The full automatic purging system of pressure tapping hole of boiler system according to claim 1, characterized in that, The light sensing detection component (5) is a light sensing sensor.

3. The full automatic purging system of pressure tapping hole of boiler system according to claim 2, characterized in that, The gas guide groove (43) is provided with a plurality of groups of purge holes (44), one group of the purge holes (44) has the same purging direction as the axial direction of the inner shell (12), and the other group of the purge holes (44) has a certain angle with the axial direction of the inner shell (12) and blows towards the axial position of the inner shell (12).

4. A purging method of a full-automatic purging system of a pressure tapping hole of a boiler system according to any one of claims 1 to 3, characterized by, The method comprises the steps of: The light sensing detection component (5) measures the light brightness in the pressure sampling channel to obtain a light brightness detection value; The differential pressure detection component (6) obtains a differential pressure value according to the pressures of the high-pressure sampling end and the low-pressure sampling end; The control component (7) controls the opening and closing of the purge component (4) according to the light brightness detection value or / and the differential pressure value.

5. Purging method according to claim 4, characterized in that, The specific process of the control component (7) controlling the opening and closing of the purge component (4) according to the light brightness detection value or / and the differential pressure value is that when the light brightness detection value is lower than a first preset threshold or / and the differential pressure value is greater than a second preset threshold, it is judged that the pressure sampling hole is blocked, at this time, the purge component (4) is opened to perform purging operation on the pressure sampling hole until the light brightness detection value is within the first preset threshold and the differential pressure value is within the second preset threshold.

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