Drainage state monitoring and soot blowing stop system

Abstract

The utility model discloses a drainage state monitoring and soot blowing stop system which comprises an intelligent soot blowing control unit, a drainage state monitoring unit and a plurality of soot blowers. The plurality of soot blowers are mounted in the hearth and are connected with the main drain pipeline through soot blower pipelines; the drainage state monitoring unit is arranged at the position, close to the inlet end, of the drainage main pipeline and used for monitoring the temperature and pressure in the drainage main pipeline. The input end of the intelligent soot blowing control unit is connected with the drainage state monitoring unit, the output end of the intelligent soot blowing control unit is connected with power switches of the soot blowers, and the intelligent soot blowing control unit is used for controlling the soot blowers to stop when the temperature and pressure monitored by the drainage state monitoring unit are abnormal. According to the utility model, the drainage state is monitored in real time, and the soot blowing operation is intelligently controlled according to the monitoring result, so that the operation safety and economy of the boiler are improved, the energy consumption is reduced, and the service life of the boiler is prolonged.

Description

Technical Field

[0001] The utility model belongs to the field of soot blowing systems of industrial boilers, in particular to a drainage state monitoring and soot blowing mid-stop system. Background Art

[0002] In the operation of industrial boilers, in order to keep the heating surface clean and improve thermal efficiency, it is necessary to perform soot blowing on the boiler regularly. Soot blowing usually involves using steam or compressed air to remove dust and ash accumulated on the heating surface of the boiler.

[0003] For example, a sootblowing optimization control system with publication number CN211952806U includes a boiler DCS system, a main server connected to the boiler DCS system, and a sootblower arranged in the boiler. The sootblower is electrically connected to the main server through a PLC controller. It also includes an optimization sensor assembly electrically connected to the main server. The optimization sensor assembly is arranged in the low-temperature zone of the flue gas channel. The optimization sensor assembly is used to collect the temperature and oxygen content of the flue gas in the flue gas channel and send the collected data to the main server.

[0004] However, the traditional soot blowing system has the following problems and shortcomings:

[0005] (1) Insufficient monitoring of drain status: Existing sootblowing systems often lack real-time monitoring of drain status. Abnormalities in the drain system, such as poor draining or abnormal drain temperature, may lead to corrosion or water hammer on the boiler heating surface, and even cause boiler explosion in severe cases.

[0006] (2) Blindness of soot blowing operation: Due to the lack of accurate monitoring of the actual operating status of the boiler, soot blowing operation is often performed on a timed basis or based on experience, and cannot be optimized and adjusted according to the actual soot accumulation and load changes of the boiler, resulting in energy waste and equipment loss;

[0007] (3) Safety risks: Continuing the soot blowing operation when the drain system is abnormal may aggravate the damage to the boiler and increase the safety risk;

[0008] (4) Low level of intelligence: Most existing sootblowing systems rely on manual operation and lack intelligent control, making it impossible to automatically adjust the sootblowing strategy based on real-time boiler operation data;

[0009] (5) Poor economy: Due to the blindness and lack of optimization of sootblowing operations, steam and electricity consumption increase, which increases operating costs. Utility Model Content

[0010] In view of the above problems, the utility model provides a drain status monitoring and sootblowing stop system, which monitors the drain status in real time and intelligently controls the sootblowing operation according to the monitoring results, thereby improving the operating safety and economy of the boiler, reducing energy consumption, and extending the service life of the boiler.

[0011] A drainage state monitoring and sootblowing mid-stop system, comprising an intelligent sootblowing control unit, a drainage state monitoring unit and a plurality of sootblowers;

[0012] The soot blowers are installed in the furnace and connected to the main drain pipeline through the soot blower pipeline;

[0013] The drain status monitoring unit is arranged on the drain main pipeline near the inlet end, and is used to monitor the temperature and pressure in the drain main pipeline;

[0014] The input end of the intelligent sootblowing control unit is connected to the drainage state monitoring unit, and the output end is connected to the power switches of several sootblowers, and is used to control the sootblowers to stop when the temperature and pressure monitored by the drainage state monitoring unit are abnormal.

[0015] Furthermore, the hydrophobic state monitoring unit includes at least one group of sensors, and each group of sensors includes a thermocouple and a pressure sensor.

[0016] Preferably, the drain state monitoring unit comprises five groups of sensors arranged at intervals along the drain main pipeline for monitoring. Further preferably, the five groups of sensors are arranged at equal intervals.

[0017] Optionally, the model of the thermocouple is WRKK-131.

[0018] Furthermore, the input end of the intelligent sootblowing control unit is also connected to an operating parameter monitoring unit, which is used to monitor the operating parameters of the boiler (such as the load range and load change rate of the boiler) and send them to the intelligent sootblowing control unit. The intelligent sootblowing control unit 5 adjusts the sootblowing time and sootblowing frequency of the sootblower according to the boiler parameters.

[0019] Furthermore, a drain vent pipeline is provided at the end of the drain main pipeline, and a drain vent pipeline valve is provided on the drain vent pipeline.

[0020] Furthermore, a sootblower pipeline valve is provided on the sootblower pipeline.

[0021] Furthermore, the main drain pipeline is provided with a main drain pipeline valve at the inlet end.

[0022] Furthermore, the intelligent sootblowing control unit adopts a DCS controller.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model provides a system which can monitor the drainage state in real time and intelligently control the soot blowing operation according to the monitoring result; by monitoring the drainage state in real time and promptly terminating the soot blowing operation under abnormal conditions, the safety of industrial boiler operation is significantly improved, and boiler damage or accidents caused by drainage problems are effectively prevented; by accurately controlling the soot blowing operation, the mechanical wear on the boiler heating surface is reduced, which helps to extend the service life of the boiler and related equipment; since unnecessary soot blowing operations are reduced and the equipment life is extended, the utility model helps to reduce the maintenance cost and downtime of industrial boilers. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of a drainage status monitoring and sootblowing stop system of the utility model.

[0026] In the figure: 1-furnace; 2-soot blower; 3-drain venting pipeline; 4-drain status monitoring unit; 5-intelligent sootblowing control unit; 6-operation parameter monitoring unit; 7-drain pipeline main valve; 8-sootblower pipeline valve; 9-drain venting pipeline valve; 10-drain main pipeline. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be pointed out that the embodiments described below are intended to facilitate the understanding of the present invention and do not have any limiting effect on the present invention.

[0028] like Figure 1 As shown, a drainage state monitoring and sootblowing stop system includes an intelligent sootblowing control unit 5, a drainage state monitoring unit 4, an operation parameter monitoring unit 6 and a plurality of sootblowers 2.

[0029] A plurality of sootblowers 2 are installed in the furnace 1 and connected to the drain main pipeline 10 through sootblowers pipelines. A drain state monitoring unit 4 is arranged on the drain main pipeline 10 near the inlet end and is used to monitor the temperature and pressure in the drain main pipeline 10.

[0030] The intelligent sootblowing control unit 5 adopts a DCS controller, whose input end is connected to the drainage state monitoring unit 4, and whose output end is connected to the power switches of several sootblowers 2, and is used to control the sootblowers 2 to stop when the temperature and pressure monitored by the drainage state monitoring unit 4 are abnormal.

[0031] The input end of the intelligent sootblowing control unit 5 is also connected to the operating parameter monitoring unit 6 , which is used to monitor the operating parameters of the boiler and send the parameters to the intelligent sootblowing control unit 5 .

[0032] In this embodiment, the drain state monitoring unit 4 includes five groups of sensors arranged at intervals along the monitoring drain main pipeline 10, each group of sensors includes a thermocouple and a pressure sensor. Among them, the thermocouple model specification is WRKK-131, single K-division, φ5*600, material 316L, accuracy level I.

[0033] The operating parameter monitoring unit 6 includes at least two sensors related to the operating state of the boiler, and is used to collect the operating parameters of the boiler. In this embodiment, the operating parameter monitoring unit 6 is used to monitor the load range and load change rate of the boiler.

[0034] In the present invention, the intelligent sootblowing control unit 5 adjusts the sootblowing time and frequency of the sootblower 2 according to the boiler parameters monitored by the operating parameter monitoring unit 6. At the same time, when receiving the abnormal drainage state signal sent by the drainage state monitoring unit 4, the power supply of the corresponding sootblower 2 can be automatically cut off until the drainage state signal is normal.

[0035] In this embodiment, a drain vent pipeline 3 is provided at the end of the drain main pipeline 10, and a drain vent pipeline valve 9 is provided on the drain vent pipeline 3. When the soot blowing operation of the boiler stops, the remaining drain in the drain main pipeline 10 can be discharged through the drain vent pipeline 3.

[0036] In order to further strengthen the control of the sootblowing process, a sootblower pipeline valve 8 is provided on the sootblower pipeline, and a drain pipeline main valve 7 is provided at the inlet end of the drain main pipeline 10.

[0037] The embodiments described above provide a detailed description of the technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A drainage status monitoring and sootblowing stop system, characterized in that: It comprises an intelligent sootblowing control unit (5), a drainage state monitoring unit (4) and a plurality of sootblowers (2); The plurality of soot blowers (2) are installed in the furnace (1) and connected to the main drain pipeline (10) through the soot blower pipeline; The drain status monitoring unit (4) is arranged on the drain main pipeline (10) at a position close to the inlet end, and is used to monitor the temperature and pressure in the drain main pipeline (10); The input end of the intelligent sootblowing control unit (5) is connected to the drainage state monitoring unit (4), and the output end is connected to the power switches of a plurality of sootblowers (2), and is used to control the sootblowers (2) to stop when the temperature and pressure monitored by the drainage state monitoring unit (4) are abnormal.

2. The drainage status monitoring and sootblowing stop system according to claim 1, characterized in that: The hydrophobic state monitoring unit (4) comprises at least one group of sensors, each group of sensors comprising a thermocouple and a pressure sensor.

3. The drainage status monitoring and sootblowing stop system according to claim 2, characterized in that: The drain status monitoring unit (4) comprises five groups of sensors arranged at intervals along the drain monitoring main pipeline (10).

4. The drainage status monitoring and sootblowing stop system according to claim 3, characterized in that: The five groups of sensors are arranged at equal intervals.

5. The drainage status monitoring and sootblowing stop system according to claim 2, characterized in that: The model of the thermocouple is WRKK-131.

6. The drainage status monitoring and sootblowing stop system according to claim 1, characterized in that: The input end of the intelligent sootblowing control unit (5) is also connected to an operating parameter monitoring unit (6), and the operating parameter monitoring unit (6) is used to monitor the operating parameters of the boiler and send them to the intelligent sootblowing control unit (5).

7. The drainage status monitoring and sootblowing stop system according to claim 1, characterized in that: A drain vent pipeline (3) is provided at the end of the drain main pipeline (10), and a drain vent pipeline valve (9) is provided on the drain vent pipeline (3).

8. The drainage status monitoring and sootblowing stop system according to claim 1, characterized in that: The soot blower pipeline is provided with a soot blower pipeline valve (8).

9. The drainage status monitoring and sootblowing stop system according to claim 1, characterized in that: The drain main pipeline (10) is provided with a drain pipeline main valve (7) at the inlet end.

10. The drainage status monitoring and sootblowing stop system according to claim 1, characterized in that: The intelligent sootblowing control unit (5) adopts a DCS controller.

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