Grid type sound wave and steam two-in-one soot blower

Abstract

The utility model discloses a grid type sound wave and steam two-in-one soot blower, and particularly relates to the technical field of soot blowers, which comprises a furnace body, a separator is mounted in the furnace body, and the furnace body is divided into a low-temperature reheating area and a low-temperature overheating area by the separator. And three tube panels are mounted in each of the low-temperature reheating area and the low-temperature overheating area. According to the utility model, the blowing loss of a tail heating surface pipe is reduced through the steam soot blower, and meanwhile, the sound wave soot blower is used for circulating soot blowing, so that the heat loss caused by fly ash heat resistance when the steam soot blower is not used is reduced; the soot blowing mode formed by overlapping the grid type sound wave soot blowing and the steam soot blowing and composed of the sound wave soot blowers and the two steam soot blowers plays a role in reducing the heat exchange resistance of the tail heating surface and reducing the blowing loss of a pipe of the tail heating surface, and the heat exchange efficiency and the equipment reliability of operation of the tail heating surface are comprehensively considered; therefore, economy and stability of operation of the heating surface of the boiler are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sootblowing devices, in particular to a grid-type sonic wave and steam two-in-one sootblowing device. Background Art

[0002] Thermal power generation is the main form of power generation in my country. According to statistics, 60% of the unplanned shutdowns of thermal power units are caused by leakage of the "four tubes" of the boiler. The rear heating surface, as an important part of the "four tubes" components, is an important part for heat recovery of high-temperature flue gas after furnace combustion. A large number of heat exchange tube screens are distributed in this area, which is an important heat exchange device for heating low-quality media into higher-quality media.

[0003] However, when pulverized coal burns in the furnace, a large amount of soot will be generated. When the soot passes through the heat exchange tube screen at the rear, it is easy to adhere to the surface of the heat exchange tube screen and form ash accumulation. Ash accumulation will increase the heat exchange thermal resistance of the tube screen, affect the heat exchange efficiency of the tube, and cause the exhaust gas temperature to rise and the boiler efficiency to decrease. In order to reduce the impact of ash accumulation on the heat exchange efficiency of the tube screen, boiler manufacturers usually arrange a steam soot blower for soot removal in this area. By blowing soot regularly, the dust gradually accumulated on the heat exchange tube screen can be cleaned in time, thereby improving the overall heat exchange efficiency of the boiler. However, during the anti-wear and explosion-proof inspections of the tail heating surface in previous years, it was found that the heat exchange tube screen of the tail heating surface had different degrees of blowing damage in the steam sootblower channel area. Although the boiler technical management personnel actively took the approach of adding anti-wear tiles for protection, it was difficult to fully protect the joints between the suspended tubes and the horizontal tubes. In addition, the gap between the tube screens was small, and it would become increasingly difficult to measure the thickness of the fourth tube in the tube screen and add anti-wear tiles. Therefore, the use of steam sootblower sootblowing alone will continuously accelerate the thinning of the pipes around the sootblowing channel. If the excessive pipe fittings are not discovered in time during the anti-wear and explosion-proof inspections, it may cause thinning and leakage of the pipe fittings, resulting in unplanned shutdown of the unit. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a grid-type sonic and steam two-in-one sootblowing device, which reduces the blowing loss of the tail heating surface pipes through the steam sootblower, and at the same time uses the sonic sootblower to start circulating sootblowing, thereby reducing the heat loss caused by the fly ash thermal resistance when the steam sootblower is not put into use. The grid-type sonic and steam sootblowing superimposed sootblowing mode composed of multiple sonic sootblower and two steam sootblower plays a role in reducing the heat exchange thermal resistance of the tail heating surface and reducing the blowing loss of the tail heating surface pipes, and comprehensively considers the heat exchange efficiency and equipment reliability of the tail heating surface operation, thereby improving the economy and stability of the boiler heating surface operation, so as to solve the problems arising from the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a grid-type sonic wave and steam two-in-one sootblowing device, comprising a furnace body, a partition is installed inside the furnace body, and the furnace body is divided into a low-temperature reheating zone and a low-temperature superheating zone by the partition, three tube screens are installed inside the low-temperature reheating zone and the low-temperature superheating zone, and three groups of sootblowing assemblies are installed on one side of the furnace body corresponding to the three tube screens;

[0006] Each set of sootblowing assemblies includes two steam sootblowers and ten sonic sootblowers, and the ten sonic sootblowers are arranged below the two steam sootblowers.

[0007] In a preferred embodiment, a first temperature sensor is installed on the top of one end of the steam soot blower away from the furnace body, and the operating temperature of the steam soot blower is monitored by the first temperature sensor, thereby preventing the steam soot blower from being overloaded due to excessive temperature.

[0008] In a preferred embodiment, a first alarm is installed on a side of the steam soot blower away from the furnace body. Through the setting of the first alarm, a staff member can be warned when the temperature of the steam soot blower is too high.

[0009] In a preferred embodiment, a second temperature sensor is installed on the top of one end of the sonic soot blower away from the furnace body. Through the setting of the second temperature sensor, the operating temperature of the sonic soot blower can be monitored. When the temperature is too high, the second alarm is used to warn the staff so that the staff can inspect and maintain the sonic soot blower in time.

[0010] In a preferred embodiment, a second alarm is installed on the side of the sonic soot blower away from the furnace body. The second alarm can timely inform the operating status of the sonic soot blower, thereby facilitating the staff to promptly inspect and repair the sonic soot blower.

[0011] In a preferred embodiment, the top of the furnace body is fixedly connected to two discharge pipes, and the positions of the two discharge pipes correspond to the low-temperature reheating zone and the low-temperature superheating zone respectively; the bottom of the furnace body is fixedly connected to two feed pipes, and the positions of the two feed pipes correspond to the low-temperature reheating zone and the low-temperature superheating zone respectively. The arrangement of the feed pipes and the discharge pipes can facilitate the circulation of materials.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The steam soot blower is used to reduce the blowing loss of the tail heating surface tubes. At the same time, the sonic soot blower is used to start circulating soot blowing to reduce the heat loss caused by the fly ash thermal resistance when the steam soot blower is not put into use. The grid-type sonic and steam soot blowing superposition soot blowing mode composed of multiple sonic soot blowers and two steam soot blowers plays a role in reducing the heat exchange thermal resistance of the tail heating surface and reducing the blowing loss of the tail heating surface tubes. The heat exchange efficiency and equipment reliability of the tail heating surface operation are comprehensively considered, thereby improving the economy and stability of the boiler heating surface operation;

[0014] 2. The operating temperature of the steam soot blower and the sonic soot blower is monitored by the first sensor and the second sensor, and the steam soot blower or the sonic soot blower with over-high temperature is warned by the first alarm and the second alarm, so that the staff can timely understand the operating status of the steam soot blower or the sonic soot blower for inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a cross-sectional view of the furnace body of the utility model;

[0017] Figure 3 It is a cross-sectional view of the low-temperature reheating zone of the utility model;

[0018] Figure 4 This is a front view of the steam soot blower of the utility model;

[0019] Figure 5 It is the front view of the sonic soot blower of the utility model.

[0020] The accompanying drawings are marked as follows: 1. furnace body; 2. partition; 3. low-temperature reheating zone; 4. low-temperature superheating zone; 5. tube screen; 6. steam soot blower; 7. sonic soot blower; 8. first temperature sensor; 9. first alarm; 10. second temperature sensor; 11. second alarm; 12. discharge pipe; 13. feed pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Refer to the instruction manual Figure 1-5The utility model provides a grid-type sonic wave and steam two-in-one sootblowing device, comprising a furnace body 1, wherein a partition 2 is installed inside the furnace body 1, and the furnace body 1 is divided into a low-temperature reheating zone 3 and a low-temperature superheating zone 4 by the partition 2, and three tube screens 5 are installed inside the low-temperature reheating zone 3 and the low-temperature superheating zone 4, and three groups of sootblowing assemblies are installed on one side of the furnace body 1 corresponding to the three tube screens 5;

[0023] Each group of sootblowing assemblies includes two steam sootblowers 6 and ten sonic sootblowers 7 , and the ten sonic sootblowers 7 are arranged below the two steam sootblowers 6 .

[0024] In order to timely understand the operating status of the steam soot blower 6, Figure 1 , 2 As shown in FIG4 , a first temperature sensor 8 is installed at the top of one end of the steam soot blower 6 away from the furnace body 1. The operating temperature of the steam soot blower 6 is monitored by the first temperature sensor 8 to prevent the steam soot blower 6 from being overheated and causing overload. A first alarm 9 is installed at the side of the steam soot blower 6 away from the furnace body 1. Through the setting of the first alarm 9, the staff can be warned when the temperature of the steam soot blower 6 is too high.

[0025] In order to timely understand the operating status of the sonic soot blower 7, Figure 1 , 2 As shown in Figure 5, a second temperature sensor 10 is installed on the top of one end of the sonic soot blower 7 away from the furnace body 1. Through the setting of the second temperature sensor 10, the operating temperature of the sonic soot blower 7 can be monitored. When the temperature is too high, the second alarm 11 is used to warn the staff so that the staff can promptly inspect and maintain the sonic soot blower 7. A second alarm 11 is installed on the side of the sonic soot blower 7 away from the furnace body 1. Through the setting of the second alarm 11, the operating status of the sonic soot blower 7 can be promptly informed, thereby facilitating the staff to promptly inspect and maintain the sonic soot blower 7.

[0026] In order to ensure the smooth flow of materials, Figure 1-3 As shown, the top of the furnace body 1 is fixedly connected with two discharge pipes 12, and the positions of the two discharge pipes 12 correspond to the low-temperature reheating zone 3 and the low-temperature superheating zone 4 respectively; the bottom of the furnace body 1 is fixedly connected with two feed pipes 13, and the positions of the two feed pipes 13 correspond to the low-temperature reheating zone 3 and the low-temperature superheating zone 4 respectively. The arrangement of the feed pipes 13 and the discharge pipes 12 can facilitate the circulation of materials.

[0027] The soot blowing frequency of the steam soot blower 6 is determined by the equipment blowing damage of the low-temperature reheating zone 3 and the low-temperature superheating zone 4. By reducing the steam soot blowing frequency and appropriately reducing the soot blowing pressure, the blowing damage of the tail heating surface pipe is reduced. At the same time, the soot blowing of the additional sonic soot blower 7 is put into circulation to reduce the heat loss caused by the fly ash thermal resistance when the steam soot blower 6 is not put into use. The soot blowing mode with the grid-type sonic wave and steam soot blowing superimposed plays a role in reducing the heat exchange resistance of the tail heating surface and reducing the blowing damage of the tail heating surface pipe, and comprehensively considers the heat exchange efficiency and equipment reliability of the tail heating surface operation, thereby improving the economy and stability of the boiler heating surface operation.

[0028] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A grid-type sonic wave and steam two-in-one sootblowing device, comprising a furnace body (1), characterized in that: A partition (2) is installed inside the furnace body (1), and the furnace body (1) is divided into a low-temperature reheating zone (3) and a low-temperature superheating zone (4) by the partition (2); three tube screens (5) are installed inside the low-temperature reheating zone (3) and the low-temperature superheating zone (4), and three groups of soot blowing assemblies are installed on one side of the outside of the furnace body (1) corresponding to the three tube screens (5); Each group of sootblowing assemblies comprises two steam sootblowers (6) and ten sonic sootblowers (7), and the ten sonic sootblowers (7) are arranged below the two steam sootblowers (6).

2. A grid-type sonic wave and steam two-in-one sootblowing device according to claim 1, characterized in that: A first temperature sensor (8) is installed on the top of one end of the steam soot blower (6) away from the furnace body (1).

3. A grid-type sonic wave and steam two-in-one sootblowing device according to claim 1, characterized in that: A first alarm (9) is installed on the side of the steam soot blower (6) away from the furnace body (1).

4. A grid-type sonic wave and steam two-in-one sootblowing device according to claim 1, characterized in that: A second temperature sensor (10) is installed on the top of one end of the sonic soot blower (7) away from the furnace body (1).

5. The grid-type sonic wave and steam two-in-one sootblowing device according to claim 1, characterized in that: A second alarm (11) is installed on the side of the sonic soot blower (7) away from the furnace body (1).

6. A grid-type sonic wave and steam two-in-one sootblowing device according to claim 1, characterized in that: The top of the furnace body (1) is fixedly connected to two discharge pipes (12), and the positions of the two discharge pipes (12) correspond to the low-temperature reheating zone (3) and the low-temperature superheating zone (4) respectively; Two feed pipes (13) are fixedly connected to the bottom of the furnace body (1), and the positions of the two feed pipes (13) correspond to the low-temperature reheating zone (3) and the low-temperature superheating zone (4) respectively.

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