A soot blowing system for a coke dry quenching waste heat boiler

Abstract

The utility model embodiment provides a kind of dry quenching waste heat boiler soot blowing system, comprising: dry quenching waste heat boiler heating surface, temperature collector, soot blowing nozzle, nitrogen supply device and gas energy shock wave generating device;Temperature collector is used to collect the temperature of dry quenching waste heat boiler heating surface;The outlet of soot blowing nozzle is towards dry quenching waste heat boiler heating surface;The purity of nitrogen supplied by nitrogen supply device is not less than 99%;The gas inlet of gas energy shock wave generating device is connected with the gas outlet of nitrogen supply device, the gas outlet of gas energy shock wave generating device is connected with the gas inlet of soot blowing nozzle, for releasing nitrogen from nitrogen supply device to form pulse shock wave, and is ejected by soot blowing nozzle.The embodiment of the application uses nitrogen instead of air as gas source, reduces the oxygen introduction hidden danger, improves the safety defects of conventional gas energy shock wave soot blower in dry quenching scene, can meet the requirement of system to safety and stability.

Description

Technical Field

[0001] This utility model relates to the field of coking technology, and in particular to a soot blowing system for a dry quenching waste heat boiler. Background Technology

[0002] Dry quenching technology, a key energy-saving technology in the coking industry, relies on inert gas to cool red-hot coke and then recovering the heat carried by the inert gas to generate steam through a waste heat boiler. In recent years, however, frequent tube ruptures in dry quenching waste heat boilers have not only increased equipment maintenance costs but also severely impacted the continuous and stable operation of the dry quenching system, causing significant economic losses to enterprises.

[0003] To address the problem of boiler tube rupture, the industry has widely adopted high-efficiency cyclone dust collectors to replace traditional primary gravity dust collectors, achieving significant results in engineering applications. After being treated by a primary cyclone dust collector, the high-temperature coke powder blown out of the dry quenching furnace can have its dust concentration reduced to below 1 g / m³, with the dust particle size controlled below 0.25 mm. This low-concentration, small-particle-size coke powder greatly reduces wear on the boiler's heating surfaces, fundamentally alleviating the risk of boiler tube rupture.

[0004] However, new problems arise: fine coke particles, once inside a dry-quenching boiler, easily adhere to the boiler's heating surface due to electrostatic adsorption and intermolecular forces. As the amount of coke powder accumulates, the thermal resistance of the boiler's heating surface increases significantly, directly leading to a decrease in boiler steam production and an increase in exhaust temperature. This not only reduces waste heat utilization efficiency but may also trigger secondary equipment malfunctions.

[0005] Because the dry quenching system is a closed-loop system, the internal circulating gas contains a large amount of toxic and flammable gases such as hydrogen and CO. Therefore, there are strict limitations on the selection of sootblowers: First, the amount of oxygen introduced by the sootblowing medium must be strictly controlled to avoid the formation of an explosive gas mixture; second, the water content of the medium must be controlled to prevent corrosion of the heated surfaces or impact on system operation. Based on this, conventional steam sootblowers cannot be used in this scenario because the oxygen and water content of the medium does not meet the requirements.

[0006] Among the current mainstream industrial soot blowing technologies, sonic soot blowers, while offering the advantage of a wide cleaning range, have low energy density and can only remove loose floating ash, with limited effectiveness on coke powder films adhering to heated surfaces. Gas-fired shockwave soot blowers utilize the combustion of combustible gas mixed with air to generate shock waves, posing safety risks due to the flammability and explosiveness of the fuel, making them unsuitable for closed systems containing combustible gases. Conventional gas-powered shockwave soot blowers use compressed air as their gas source, and although their pressure of 0.5~1.5MPa matches the supply pressure of the compressed air station in coking plants, each soot blowing process introduces air into the dry quenching system, increasing the system's oxygen content, posing safety hazards, and affecting system operational stability. Therefore, there is an urgent need for a high-efficiency and safe soot blowing solution adapted to the operating characteristics of dry quenching systems. Utility Model Content

[0007] The purpose of this utility model embodiment is to provide a soot blowing system for a dry quenching coke waste heat boiler, so as to improve the operational safety of the soot blowing system. The specific technical solution is as follows:

[0008] A soot blowing system for a dry quenching waste heat boiler includes:

[0009] Heating surface of dry quenching waste heat boiler;

[0010] A temperature acquisition device is used to collect the temperature of the heating surface of the dry quenching waste heat boiler.

[0011] The soot blowing nozzle has its outlet facing the heating surface of the dry quenching waste heat boiler.

[0012] A nitrogen supply device, wherein the nitrogen supplied by the nitrogen supply device has a purity of not less than 99%;

[0013] A gas-energy shock wave generator, wherein the air inlet of the gas-energy shock wave generator is connected to the air outlet of the nitrogen supply device, and the air outlet of the gas-energy shock wave generator is connected to the air inlet of the soot blowing nozzle, for releasing nitrogen from the nitrogen supply device to form a pulse shock wave, which is then ejected by the soot blowing nozzle.

[0014] In some embodiments, it also includes:

[0015] A control device is electrically connected to both the temperature acquisition device and the gas energy shock wave generator, and controls the operation of the gas energy shock wave generator based on the temperature acquired by the temperature acquisition device.

[0016] In some embodiments, the gas energy shock wave generator includes a pressure controller and a pulse trigger, wherein the pressure controller is used to adjust the pressure of the pulse shock wave, and the pulse trigger is used to adjust the release frequency of the pulse shock wave.

[0017] In some embodiments, the pressure range of the pulsed shock wave is from 0.3 MPa to 1.2 MPa.

[0018] In some embodiments, it also includes:

[0019] A pressure sensor is used to collect the pressure of nitrogen supplied by the nitrogen supply device.

[0020] In some embodiments, it also includes:

[0021] The human-computer interface is electrically connected to the control device.

[0022] In some embodiments, the jet angle of the soot blowing nozzle is adjustable.

[0023] In some embodiments, the soot blowing nozzle includes a first nozzle and a second nozzle, which are disposed opposite to each other on both sides of the same dry quenching waste heat boiler heating surface.

[0024] In some embodiments, the adjustable angle of the jet from the soot blowing nozzle is 180°.

[0025] In some embodiments, the heating surface of the dry quenching waste heat boiler includes, in sequence, at least one of: a high-temperature superheater, a high-temperature reheater, a low-temperature superheater, a low-temperature reheater, a high-temperature evaporator, a low-temperature evaporator, and an economizer.

[0026] This utility model provides a soot blowing system for a dry quenching waste heat boiler, comprising: a heating surface of the dry quenching waste heat boiler, a temperature acquisition device, soot blowing nozzles, a nitrogen supply device, and a gas energy shock wave generator. The temperature acquisition device is used to collect the temperature of the heating surface of the dry quenching waste heat boiler. The outlet of the soot blowing nozzles faces the heating surface of the dry quenching waste heat boiler. The nitrogen supplied by the nitrogen supply device has a purity of not less than 99%. The inlet of the gas energy shock wave generator is connected to the outlet of the nitrogen supply device, and the outlet of the gas energy shock wave generator is connected to the inlet of the soot blowing nozzles, for releasing nitrogen from the nitrogen supply device to form a pulsed shock wave, which is then ejected by the soot blowing nozzles. In this embodiment, the temperature acquisition device monitors the temperature change of the heating surface in real time. Since coke powder adhesion can cause abnormal temperature rises, this temperature data can provide a basis for identifying soot blowing needs, enabling operators or machines to promptly know whether there is a coke powder deposition problem on the heating surface. The nitrogen supply device provides nitrogen with a purity of no less than 99%. This high purity ensures extremely low oxygen and moisture content in the gas, reducing the risk of introducing oxygen to form an explosive mixture or causing corrosion. The gas-energy shock wave generator can utilize the high-purity nitrogen output from the nitrogen supply device to generate a pulsed shock wave. This pulsed shock wave effectively breaks the electrostatic adsorption force between coke powder and the heated surface, removing coke powder adhering to the heated surface. The embodiments of this application use nitrogen instead of air as the gas source, reducing the risk of oxygen introduction and improving the safety deficiencies of conventional gas-energy shock wave soot blowers in dry quenching scenarios, thus meeting the system's requirements for safety and stability.

[0027] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0029] Figure 1A schematic diagram of the internal structure of a dry quenching waste heat boiler soot blowing system provided in this application embodiment;

[0030] Figure 2 for Figure 1 The diagram shows a soot blowing system for a dry quenching waste heat boiler, illustrating the soot blowing process on the boiler's heating surface.

[0031] The attached figures are labeled as follows:

[0032] The dry quenching waste heat boiler includes a heating surface 1, a high-temperature superheater 11, a high-temperature reheater 12, a low-temperature superheater 13, a low-temperature reheater 14, a high-temperature evaporator 15, a low-temperature evaporator 16, an economizer 17, a soot blowing nozzle 2, a first nozzle 21, a second nozzle 22, a gas energy shock wave generator 3, a control device 4, a short side of the furnace wall 51, and a long side of the furnace wall 52. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art based on this application are within the protection scope of the present utility model.

[0034] Figure 1 A schematic diagram of the internal structure of a dry quenching coke waste heat boiler soot blowing system provided in this application embodiment is shown below. Figure 1 As shown, an embodiment of this application proposes a soot blowing system for a dry quenching waste heat boiler, comprising: a heating surface 1 of the dry quenching waste heat boiler, a temperature collector, a soot blowing nozzle 2, a nitrogen supply device, and a gas energy shock wave generator 3; the temperature collector is used to collect the temperature of the heating surface 1 of the dry quenching waste heat boiler; the outlet of the soot blowing nozzle 2 faces the heating surface 1 of the dry quenching waste heat boiler; the nitrogen supplied by the nitrogen supply device has a nitrogen purity of not less than 99%; the inlet of the gas energy shock wave generator 3 is connected to the outlet of the nitrogen supply device, and the outlet of the gas energy shock wave generator 3 is connected to the inlet of the soot blowing nozzle 2, for releasing nitrogen from the nitrogen supply device to form a pulse shock wave, which is then ejected by the soot blowing nozzle 2.

[0035] The heating surface 1 of the dry quenching waste heat boiler is the main area for heat exchange inside the boiler, and its surface is easily affected by coke powder adhesion, which affects its heat transfer performance.

[0036] In specific implementation, the heating surface 1 of the dry quenching waste heat boiler includes, in sequence, at least one of the following: high temperature superheater 11, high temperature reheater 12, low temperature superheater 13, low temperature reheater 14, high temperature evaporator 15, low temperature evaporator 16, and economizer 17.

[0037] For example, in a dry quenching waste heat boiler with ultra-high temperature and ultra-high pressure parameters, the boiler heating surfaces are arranged from top to bottom as follows: high-temperature superheater 11, high-temperature reheater 12, low-temperature superheater 13, low-temperature reheater 14, high-temperature evaporator 15, low-temperature evaporator 16, and economizer 17. Each heating surface consists of multiple serpentine tube bundles, and space is reserved between adjacent serpentine tube bundles for installing and maintaining soot blowing nozzles 2. The shock wave effect area released by the soot blowing nozzles 2 corresponding to each heating surface covers the windward side of each serpentine tube bundle.

[0038] In a dry quenching waste heat boiler without ultra-high temperature and ultra-high pressure parameters, a high-temperature reheater 12 and a low-temperature reheater 14 are not installed. The boiler heating surfaces are arranged from top to bottom as follows: high-temperature superheater 11, low-temperature superheater 13, high-temperature evaporator 15, low-temperature evaporator 16, and economizer 17.

[0039] A temperature acquisition device is used to detect temperature changes on a heated surface. It monitors temperature data in real time to reflect the adhesion of coke powder on the heated surface.

[0040] The soot blowing nozzle 2 can be positioned above the heating surface, with its nozzle tilted downwards, so as to inject nitrogen gas into the coke powder adhering to the heating surface. The soot blowing nozzle 2 is made of high-temperature resistant alloy steel (such as 310S), which can withstand the working temperature of 300℃ to 800℃ inside the boiler, avoiding high-temperature deformation or corrosion.

[0041] The function of the gas energy shock wave generator 3 is to convert nitrogen into pulse shock waves. Specifically, it generates pulse shock waves by rapidly releasing high-pressure nitrogen and sprays them onto the heated surface through the soot blowing nozzle 2.

[0042] The working process of this application embodiment is as follows:

[0043] When the soot blowing system of the dry quenching waste heat boiler is working, if the temperature collected by the temperature acquisition device is high, it can be determined that there is a problem of coke powder sticking to the heating surface (the embodiments of this application are not limited to human judgment or machine judgment).

[0044] The nitrogen supply device supplies high-pressure nitrogen at a stable pressure to the gas energy shock wave generator 3;

[0045] When the gas energy shock wave generator 3 is turned on, high-pressure nitrogen gas is released instantaneously through the soot blowing nozzle 2, forming a high-intensity pulse shock wave at the nozzle outlet;

[0046] The shock wave acts on the windward side of the heating surface 1 of the dry quenching waste heat boiler, causing it to vibrate violently and break down. The broken fine coke powder particles are carried by the circulating inert gas inside the dry quenching system and are captured by the circulating gas in the subsequent dust removal system, thus completing the cleaning process of the heating surface.

[0047] In the embodiments of this application, a temperature acquisition device monitors the temperature changes of the heated surface in real time. Since coke powder adhesion can cause abnormal temperature increases, this temperature data can provide a basis for identifying soot blowing needs, enabling operators or machines to promptly detect whether there is a coke powder deposition problem on the heated surface. The nitrogen supply device provides nitrogen with a purity of not less than 99%. High purity ensures extremely low oxygen and moisture content in the gas, reducing the risk of introducing oxygen to form an explosive mixture or causing corrosion. The gas energy shock wave generator 3 can use the high-purity nitrogen output from the nitrogen supply device to form a pulsed shock wave. The pulsed shock wave can effectively destroy the electrostatic adsorption force between the coke powder and the heated surface, removing the coke powder adhered to the heated surface. The embodiments of this application use nitrogen instead of air as the gas source, reducing the risk of oxygen introduction and improving the safety defects of conventional gas energy shock wave soot blowers in dry quenching scenarios, thus meeting the system's requirements for safety and stability.

[0048] In the embodiment where the gas energy shock wave generator 3 is automatically activated by a machine, the dry quenching waste heat boiler soot blowing system also includes a control device 4. The control device 4 is electrically connected to the temperature acquisition device and the gas energy shock wave generator 3, respectively, and controls the operation of the gas energy shock wave generator 3 according to the temperature acquired by the temperature acquisition device.

[0049] Specifically, control device 4 refers to an electronic device that can receive and process temperature data and output control commands, which can be implemented using a programmable logic controller (PLC) or an industrial computer.

[0050] The temperature acquisition device is used to monitor the temperature change of the heating surface 1 of the dry quenching waste heat boiler in real time. It can acquire temperature data through technologies such as thermocouples or infrared temperature sensors.

[0051] In detail, the control device 4, through electrical connection with the temperature acquisition unit and the gas-energy shock wave generator 3, constructs an automatic control system. The temperature acquisition unit transmits the real-time temperature of the heating surface 1 of the dry quenching waste heat boiler to the control device 4. The control device 4 determines whether the gas-energy shock wave generator 3 needs to be activated based on a preset temperature threshold. When the acquired temperature exceeds the temperature threshold, the control device 4 automatically triggers the gas-energy shock wave generator 3 to release pulsed shock waves for soot blowing; when the temperature drops to the set lower limit, the soot blowing operation stops. The use of an automatic soot blowing control scheme based on temperature feedback ensures the timeliness of the soot blowing operation.

[0052] In specific implementation, the gas energy shock wave generator 3 includes a pressure controller and a pulse trigger. The pressure controller is used to adjust the pressure of the pulse shock wave, specifically, the pressure range of the pulse shock wave is from 0.3 MPa to 1.2 MPa. The pulse trigger is used to adjust the release frequency of the pulse shock wave.

[0053] This solution achieves precise control of the pulse shock wave pressure and frequency parameters through the combined use of a pressure controller and a pulse trigger. It adjusts the shock wave intensity and release frequency according to the ash condition of the heated surface to meet the ash removal needs of different heated surfaces.

[0054] For example, the pressure controller can automatically adjust the output pressure based on the temperature data of the heated surface fed back by the temperature acquisition device. When an abnormal temperature rise is detected to an abnormal threshold, the shock wave pressure can be increased accordingly to enhance the dust removal effect. The pulse trigger controls the release frequency of the shock wave according to a preset program or real-time operating conditions. The trigger frequency is increased when coke powder accumulates quickly and decreased when accumulation is slow.

[0055] Based on the above-mentioned dry quenching waste heat boiler soot blowing system, by introducing a pressure controller and a pulse trigger, the gas energy shock wave generator 3 can flexibly adjust its working parameters according to the actual working conditions, thereby improving the soot removal effect.

[0056] To maintain a stable nitrogen pressure supplied by the nitrogen supply device, the dry quenching waste heat boiler soot blowing system also includes a pressure sensor, which is used to collect the nitrogen pressure supplied by the nitrogen supply device.

[0057] Pressure sensors can be installed on the output line of the nitrogen supply unit to obtain real-time nitrogen pressure data. The main purpose is to accurately monitor nitrogen pressure, thereby maintaining stable system operation and reducing potential safety risks.

[0058] The control device 4 can dynamically adjust the operating parameters of the gas energy shock wave generator 3 based on the real-time nitrogen pressure data, such as adjusting the pressure or release frequency of the pulse shock wave, to ensure that the soot blowing effect is always in the best state.

[0059] In some embodiments, by monitoring nitrogen pressure in real time, the dry quenching waste heat boiler soot blowing system can issue an alarm or take protective measures in a timely manner when the pressure is abnormal, so as to avoid equipment failure or safety hazards caused by excessively high or low pressure.

[0060] The embodiments of this application further propose that the dry quenching waste heat boiler soot blowing system also includes a human-machine interface, and the human-machine interface and control device 4 are electrically connected.

[0061] Specifically, a human-machine interface is a device used to enable information exchange between operators and the soot blowing system of a dry quenching waste heat boiler. It can be implemented in the form of a touch screen, a button panel, or the like.

[0062] The human-machine interface allows operators to input control commands based on actual operating conditions, such as adjusting the operating mode of the gas energy shock wave generator 3 (e.g., pressure parameters of the pressure controller and frequency parameters of the pulse trigger) or setting temperature thresholds. Furthermore, the interface is not limited to real-time display of system status information, such as current nitrogen supply pressure, pulse shock wave pressure, and frequency.

[0063] The embodiments of this application further propose that the jet angle of the soot blowing nozzle 2 is adjustable.

[0064] Specifically, the soot blowing nozzle 2 can be an adjustable jet angle soot blowing nozzle 2 as is currently available in the technology. For example, the soot blowing nozzle 2 includes a nozzle, a nozzle pipe connected between the gas energy shock wave generator 3 and the nozzle, a rotation drive device, and a rotating shaft connected between the rotation drive device and the nozzle. The rotation drive device drives the nozzle to change the jet direction. When the heated surface has a complex structure or hard-to-reach corners, the jet angle can be adjusted to allow the pulse shock wave to accurately impact these areas, avoiding the problem of dead corners in soot cleaning caused by a fixed angle.

[0065] Specifically, the adjustable angle of the jet from the soot blowing nozzle 2 is 180°.

[0066] Figure 2 for Figure 1 The diagram shows the soot blowing process of the dry quenching waste heat boiler heating surface 1, as shown in the figure. Figure 2 As shown, this application further proposes that the soot blowing nozzle 2 includes a first nozzle 21 and a second nozzle 22, which are disposed opposite to each other on both sides of the same dry quenching waste heat boiler heating surface 1.

[0067] Taking a dry quenching waste heat boiler with a rectangular furnace as an example, the rectangular furnace has short sides 51 of furnace walls on both sides along its length and long sides 52 of furnace walls on both sides along its width. A first nozzle 21 and a second nozzle 22 are positioned opposite each other on the short sides 51 of the furnace walls on both sides of the rectangular furnace. The first nozzle 21 and the second nozzle 22 are inclined downwards and arranged at the center of the short sides 51 of the furnace walls. The relative arrangement of the first nozzle 21 and the second nozzle 22 allows for simultaneous application of soot blowing force from both sides of the heated surface, thus creating a cross-cleaning effect. This arrangement facilitates the effective elimination of cleaning dead zones.

[0068] In detail, the first nozzle 21 and the second nozzle 22 are positioned opposite each other on the same dry quenching waste heat boiler heating surface 1. By setting the jet angle to an adjustable range of 180°, the jet direction can be dynamically adjusted according to the specific shape and position of the heating surface. This design not only compensates for the coverage blind spots that may exist with fixed-angle nozzles, but also significantly enhances the removal effect on adhering coke powder.

[0069] The embodiments of this application have at least the following advantages:

[0070] (1) Solve the problem of ash accumulation and improve boiler efficiency: In response to the problem of fine dust adsorption caused by the primary cyclone dust collector, the high-intensity energy of nitrogen shock wave can effectively remove the coke powder film adhering to the heating surface and reduce the heat transfer resistance.

[0071] (2) Adapting to system characteristics and ensuring operational safety: Using high-purity nitrogen as the soot blowing medium reduces the amount of oxygen and moisture introduced into the dry quenching closed system, thereby reducing the risk of explosion caused by soot blowing and corrosion of heated surfaces. As an inert gas, nitrogen has good compatibility with combustible gases in the system, meeting the safe operation requirements of the dry quenching system.

[0072] (3) Compatible with existing conditions and reduce implementation costs: The working pressure of the nitrogen supply device is adjusted to 0.5MPa to 1.5MPa, which matches the pressure requirements of conventional gas-powered shock wave soot blowers and the energy supply conditions of the plant area. The nitrogen supply device can directly utilize the existing nitrogen supply system in the plant area without the need to build additional high-pressure gas source equipment. The soot blower has a simple structural design, and the installation process does not require major modifications to the boiler body structure. The construction period is short and the cost is controllable.

[0073] (4) High degree of automation and convenient operation and maintenance: The control device 4 realizes the automatic triggering and parameter adjustment of the soot blowing process, reducing manual intervention; the soot blowing nozzle 2 and shock wave generator are made of high temperature and wear resistant materials, with low equipment failure rate. Later maintenance only requires periodic inspection of pipeline sealing and nozzle unobstructedness, resulting in low operation and maintenance costs.

[0074] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A soot blowing system for a dry quenching waste heat boiler, characterized in that, include: Heating surface of dry quenching waste heat boiler (1); Temperature acquisition device, used to acquire the temperature of the heating surface (1) of the dry quenching waste heat boiler; Soot blowing nozzle (2), the outlet of which faces the heating surface (1) of the dry quenching waste heat boiler; A nitrogen supply device, wherein the nitrogen supplied by the nitrogen supply device has a purity of not less than 99%; A gas energy shock wave generator (3) is provided, the inlet of which is connected to the outlet of the nitrogen supply device, and the outlet of which is connected to the inlet of the soot blowing nozzle (2). The gas energy shock wave generator (3) is used to release nitrogen from the nitrogen supply device to form a pulse shock wave, which is then ejected by the soot blowing nozzle (2).

2. The soot blowing system for a dry quenching waste heat boiler according to claim 1, characterized in that, Also includes: The control device (4) is electrically connected to the temperature collector and the gas energy shock wave generator (3) respectively, and controls the operation of the gas energy shock wave generator (3) according to the temperature collected by the temperature collector.

3. The soot blowing system for a dry quenching waste heat boiler according to claim 2, characterized in that, The gas energy shock wave generator (3) includes a pressure controller and a pulse trigger. The pressure controller is used to adjust the pressure of the pulse shock wave, and the pulse trigger is used to adjust the release frequency of the pulse shock wave.

4. The soot blowing system for a dry quenching waste heat boiler according to claim 3, characterized in that, The pressure range of the pulsed shock wave is from 0.3 MPa to 1.2 MPa.

5. The soot blowing system for a dry quenching waste heat boiler according to claim 4, characterized in that, Also includes: A pressure sensor is used to collect the pressure of the nitrogen supplied by the nitrogen supply device.

6. The soot blowing system for a dry quenching waste heat boiler according to claim 5, characterized in that, Also includes: The human-computer interface is electrically connected to the control device (4).

7. The soot blowing system for a dry quenching waste heat boiler according to claim 1, characterized in that, The jet angle of the soot blowing nozzle (2) is adjustable.

8. The soot blowing system for a dry quenching waste heat boiler according to claim 7, characterized in that, The soot blowing nozzle (2) includes a first nozzle (21) and a second nozzle (22), which are arranged opposite to each other on both sides of the same dry quenching waste heat boiler heating surface (1).

9. The soot blowing system for a dry quenching waste heat boiler according to claim 8, characterized in that, The adjustable angle of the jet from the soot blowing nozzle (2) is 180°.

10. The soot blowing system for a dry quenching waste heat boiler according to any one of claims 1 to 9, characterized in that, The heating surface (1) of the dry quenching waste heat boiler includes, in sequence, at least one of the following: high temperature superheater (11), high temperature reheater (12), low temperature superheater (13), low temperature reheater (14), high temperature evaporator (15), low temperature evaporator (16), and economizer (17).

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