Control method of incinerator high-temperature smoke quenching device

Abstract

The invention provides a control method for a high-temperature flue gas quenching device of an incinerator. The control method specifically comprises the following steps: S1, acquiring a combustion stage, the temperature of flue gas and the diameter of particulate matters; s2, the number and the initial angle of the started spray guns are determined according to the combustion stage and the temperature of the smoke, and the flow speed of the started spray guns is determined according to the temperature of the smoke and the diameter of the particulate matter; s3, the flue gas temperatures of different heights in the quench tower are obtained in the injection process; if the reduction value of the flue gas temperature is lower than the temperature threshold value, the angle of the spray gun is adjusted, additional point-shaped spray spraying is carried out, and the step S3 is executed again; and if the reduction value of the flue gas temperature is greater than or equal to the temperature threshold value, returning to the step S1. According to the control method provided by the invention, the opening number, the opening angle and the opening flow speed of the spray guns can be dynamically adjusted according to the actual combustion stage of the incinerator and the inlet flue gas temperature, the accuracy and the self-adaptive capacity of the quenching process are remarkably improved, and the problem of over-spraying or under-spraying caused by working condition fluctuation is effectively avoided.

Description

Technical Field

[0001] This invention belongs to the field of flue gas cooling in incinerators, specifically relating to a control method for a rapid cooling device for high-temperature flue gas in incinerators. Background Technology

[0002] Cremation of remains and incineration of offerings generate various harmful air pollutants (HAPs), including soot, SO2, NOx, CO, HCl, HF, NH3, VOCs, heavy metals, and dioxins (PCDD / Fs). Flue gas quenching, a crucial step in flue gas purification, serves three main purposes: first, to rapidly cool the flue gas, avoiding the dioxin regeneration temperature range of 200℃-500℃, thereby reducing dioxin content; second, to cool the high-temperature flue gas to a specific temperature window (200±10℃) to meet the temperature resistance requirements of equipment, piping, and materials in the flue gas purification system; and third, to reduce the temperature of the high-temperature flue gas, significantly decreasing its volume and thus allowing for smaller purification equipment and fan specifications, thereby lowering equipment investment and operating costs.

[0003] In current industry-standard flue gas purification systems, water is commonly used as the coolant for quenching incineration flue gas, utilizing the latent heat of vaporization of water to cool the flue gas. For example, the incineration flue gas treatment device for crematoriums disclosed in CN201910522904.3 incorporates a quenching spray system based on atomizing nozzles within the quenching tower. The spray liquid is pumped to the nozzles via a booster pump and then sprayed onto the flue gas entering the tower, thereby reducing the flue gas temperature and inhibiting the low-temperature resynthesis of dioxins.

[0004] However, during actual operation of incinerators, flue gas temperature and particulate matter size distribution vary significantly, especially during start-up, shutdown, or load fluctuations. Existing systems often cannot dynamically adjust quenching operations based on real-time flue gas conditions, easily leading to "over-spraying" during heating or cooling—that is, the sprayed water volume exceeds the actual cooling requirements. Excessive water vapor entering the subsequent baghouse dust collector combines with dust, activated carbon, and quicklime in the flue gas to form mud-like condensates that adhere to the bag surface, causing "bag clogging." This not only renders the bags ineffective and clogs the filter pores but also necessitates frequent bag replacements. Furthermore, it can even react with acidic components in the flue gas to form acidic droplets that corrode the baghouse dust collector steel. Therefore, it is necessary to improve the high-temperature flue gas quenching device and control methods for incinerators. Summary of the Invention

[0005] To address the technical problems existing in the prior art, the present invention provides a control method for a high-temperature flue gas quenching device for incinerators. The method dynamically adjusts the number of spray guns opened, the spray angle, and the flow rate according to the actual combustion stage of the incinerator and the temperature of the flue gas entering the quenching tower, so as to achieve precise control of the quenching effect and ensure that the outlet flue gas temperature is always within a suitable range.

[0006] In this embodiment of the invention, a control method for a high-temperature flue gas quenching device in an incinerator is provided. The quenching device includes a quenching tower equipped with an injection device, a liquid supply device connected to the quenching tower to provide coolant to the injection device, and a control system. The control terminal of the control system is connected to the enable terminals of the quenching tower and the liquid supply device, respectively. The injection device can spray atomized coolant into the quenching tower to cool the high-temperature flue gas in the quenching tower. The injection device includes several independently operating spray guns installed on the side wall of the quenching tower, and point sprayers installed at the top or bottom of the quenching tower. The angle and flow rate of each spray gun can be adjusted individually, and the point sprayers can perform point spraying, and the spray area and flow rate can be adjusted. An inlet flue gas temperature sensor is installed at the flue gas inlet of the quenching tower or on the pipe connected to the flue gas inlet, and an outlet flue gas temperature sensor is installed at the flue gas outlet of the quenching tower or on the pipe connected to the flue gas outlet. Several tower-internal flue gas temperature sensors distributed in the height direction of the flue gas are installed in the quenching tower. The signal output terminals of the temperature sensor, the flue gas temperature sensor, and the flue gas temperature sensor inside the tower are connected to the corresponding flue gas temperature input terminals of the control system. The control system determines the number, angle, and flow rate of the spray guns based on the combustion stage of the incinerator and the temperature of the flue gas entering the quench tower. The specific control method is as follows: S1, obtain the combustion stage of the incinerator, and the temperature and particle diameter of the flue gas entering the quench tower; S2, determine the number of spray guns to be opened and the initial angle based on the combustion stage and the temperature of the flue gas, and determine the flow rate of the opened spray guns based on the temperature of the flue gas and the particle diameter; S3, obtain the flue gas temperature at different heights inside the quench tower during the spraying process; if the decrease in flue gas temperature is lower than the temperature threshold, adjust the angle of the opened spray guns to increase the angle between the spray guns and the flue gas flow path and perform additional point spraying, determine the area and flow rate of the additional point spraying, and return to step S3; if the decrease in flue gas temperature is greater than or equal to the temperature threshold, return to step S1.

[0007] Compared with the prior art, the advantages of the superior technical solution of the present invention include: 1. The control method provided by the present invention can dynamically adjust the number, angle and flow rate of the spray guns according to the actual combustion stage of the incinerator and the inlet flue gas temperature, which significantly improves the accuracy and adaptability of the quenching process and effectively avoids the problems of "over-spraying" or "under-spraying" caused by fluctuations in operating conditions.

[0008] 2. By introducing the perception and response to the diameter of flue gas particles, this invention can adjust the spray gun flow rate and point spray strategy according to the characteristics of particles with different particle size distributions, thereby significantly reducing the content of unevaporated water vapor, suppressing the occurrence of "bag clogging" in subsequent bag dust collectors from the source, and extending the service life of filter bags.

[0009] 3. This invention monitors the flue gas temperature distribution at different heights within the quench tower in real time and uses this feedback to adjust the spray gun angle and supplementary dot spray, ensuring that the flue gas is sufficiently cooled during its residence time within the quench tower. This guarantees that the flue gas outlet temperature remains stable within the safe range that inhibits dioxin resynthesis, thereby improving system reliability.

[0010] 4. This invention realizes the transformation of the quenching device from extensive spraying to refined intelligent control, which not only improves the utilization efficiency of energy and cooling medium, but also reduces the corrosion risk and maintenance cost of subsequent purification units. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the high-temperature flue gas quenching device for the incinerator in the embodiment.

[0012] The reference numerals in the accompanying drawings include: quench tower 10, flue gas inlet 11, flue gas outlet 12, spray gun 20, long shaft 21, dot sprayer 30, liquid supply pipeline 40, liquid supply control valve 41, liquid supply device 50, coolant tank 51, quench pump 52, check valve 53, and outlet pipe 54. Detailed Implementation

[0013] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0014] This embodiment provides a control method for a high-temperature flue gas quenching device for an incinerator. The high-temperature flue gas quenching device (hereinafter referred to as the quenching device) includes a quenching tower 10 equipped with a spraying device, a liquid supply device 50 connected to the quenching tower 10 to provide coolant to the spraying device, and a control system. The control terminal of the control system is connected to the enable terminal of the quenching tower 10 and the liquid supply device 50, respectively. The spraying device can spray atomized coolant into the quenching tower 10 to cool the high-temperature flue gas in the quenching tower 10.

[0015] The spraying device includes several independently operating spray guns 20 mounted on the side wall of the quench tower 10 (e.g., multiple spray guns 20 distributed along the circumference and / or height of the quench tower 10), and dot sprayers 30 mounted on the top or bottom of the quench tower 10. The angle and flow rate of each spray gun 20 can be adjusted individually. The spray gun 20 can be an adjustable atomizing nozzle. The angle of the spray gun 20 refers to its pitch angle. Specifically, multiple motors corresponding to each spray gun 20 can be installed outside the quench tower 10 (not shown in the figure; the motors are installed outside the quench tower 10 and do not directly contact the high-temperature flue gas; ordinary motors or medium-temperature resistant motors are sufficient). The output shaft of the motor is coaxially fixed to a long shaft 21 that extends vertically through the side wall of the quench tower 10 and into the quench tower 10. The long shaft 21 is fixed to the spray gun 20. The motor drives the long shaft 21 to rotate to adjust the pitch angle of the corresponding spray gun 20. The dot sprayer 30 (such as an adjustable dual-fluid atomizing nozzle or an adjustable pressure swirl nozzle) can perform dot spraying, and the spray area and flow rate can be adjusted.

[0016] The quench tower 10 has a flue gas inlet 11 and a flue gas outlet 12. The high-temperature flue gas entering the quench tower 10 moves from bottom to top. The spray gun 20 is installed above the flue gas inlet 11. For example, the flue gas inlet 11 is located on the lower side wall of the quench tower 10, and the flue gas outlet 12 is located on the top side wall of the quench tower 10. The spray gun 20 sprays diagonally downwards or downwards. The dot sprayer 30 is installed at the top of the quench tower 10 and sprays downwards. The flue gas flows from bottom to top, and the spray direction of the spray gun 20 / dot sprayer 30 is opposite to the flue gas flow direction, which is countercurrent spraying, to increase the gas-liquid contact time and enhance turbulent mixing, so that the atomized droplets mix with the flue gas and evaporate rapidly for cooling.

[0017] A flue gas temperature sensor is installed at the flue gas inlet 11 of the quench tower 10 or on the pipe connected to the flue gas inlet 11. A flue gas temperature sensor is installed at the flue gas outlet 12 of the quench tower 10 or on the pipe connected to the flue gas outlet 12. Several flue gas temperature sensors distributed in the height direction of the flue gas are installed in the quench tower 10. The signal output terminals of the flue gas temperature sensor, the flue gas temperature sensor and the flue gas temperature sensor are connected to the corresponding flue gas temperature input terminal of the control system to monitor the flue gas temperature before, during and after quenching, respectively.

[0018] The control system determines the number, angle, and flow rate of the spray guns 20 based on the combustion stage of the incinerator and the temperature of the flue gas entering the quench tower 10. The specific control method is as follows: S1, obtain the combustion stage of the incinerator (specifically obtained by monitoring the furnace temperature, which is existing technology and will not be detailed here), as well as the temperature of the flue gas entering the quench tower 10 (obtained by the flue gas temperature sensor) and the particle diameter (based on historical experience data or laboratory analysis conclusions, a preset "particle size distribution model" is assigned to each combustion stage).

[0019] S2, based on the combustion stage and the temperature of the flue gas (referring to the temperature of the flue gas entering the quench tower 10), determine the number and initial angle of the spray guns 20 to be opened, and determine the flow rate of the spray guns 20 to be opened based on the temperature of the flue gas and the diameter of the particles.

[0020] S3: During the spraying process, the flue gas temperature at different heights within the quench tower 10 is acquired (using a flue gas temperature sensor inside the tower). If the decrease in flue gas temperature is lower than the temperature threshold (indicating insufficient cooling rate), the angle of the activated spray gun 20 is adjusted to increase the angle between the spray gun 20 and the flue gas flow path (i.e., increasing the angle between the spray direction of the spray gun 20 nozzle and the flue gas flow direction; the flue gas flows upwards, and the spray gun 20 sprays downwards; by increasing the downward angle of the spray gun 20, the cooling rate is increased), and additional point spraying is performed. The point sprayer 30 is opened, and the area and flow rate of the additional point spraying are determined. The process returns to step S3. If the decrease in flue gas temperature is greater than or equal to the temperature threshold, the process returns to step S1.

[0021] It should be noted that in steps S2 and S3, the atomized droplets sprayed by all the spray guns 20 that are opened can cover the entire cross-sectional area of ​​the quench tower 10 (i.e., the atomization coverage rate is 100%).

[0022] It should be noted that the temperature and particulate matter characteristics of the flue gas change significantly at different stages of the incineration of corpses in the incinerator, which can be divided into the following stages: 1) Initial stage of combustion: The flue gas temperature is low (500℃-700℃), the particles are large, and there are more unburned organic matter and harmful gases.

[0023] 2) Mid-combustion stage: The flue gas temperature rises (800℃-1000℃), organic matter decomposes, particulate matter becomes smaller, and bone minerals begin to be released.

[0024] 3) Late stage of combustion: The flue gas temperature reaches its highest point (1000℃-1200℃), combustion is complete, the small particles increase in size, and the flue gas is relatively clean, but there are still a small amount of harmful gases.

[0025] 4) Cooling stage: The flue gas temperature decreases, particulate matter settles, and the concentration of harmful gases in the flue gas may increase.

[0026] In step S2 of this invention, the method for determining the number of spray guns to be activated and the initial angle based on the combustion stage and the temperature of the flue gas is as follows: Number of spray guns activated: , in, The number of basic work spray guns The temperature sensitivity coefficient is determined based on experience or experiments. External ambient temperature, The temperature of the flue gas entering the quench tower, This is the theoretical maximum flue gas temperature entering the quench tower. Influence function of combustion stage , Initial angle of the spray gun when activated: , in, This is the base angle for the spray gun. This is the temperature sensitivity coefficient to angle, determined empirically or experimentally. The effect function of the combustion stage on the angle .

[0027] This method introduces a basic working number of spray guns ( ) and temperature sensitivity coefficient ( The formula used to calculate the required number of spray guns avoids resource waste caused by over-spraying. Combustion stage influence function. The key innovation lies in its design. During critical stages of combustion, such as the formation of pollutants (e.g., dioxins), it automatically increases the number of spray guns and injects sufficient atomized water to ensure that the high-temperature flue gas temperature is rapidly cooled to below the target temperature in a very short time. This effectively curbs the resynthesis of harmful substances such as dioxins and ensures that the exhaust gas meets emission standards. At the same time, it avoids excessive moisture during the initial combustion and cooling stages, thus improving the stability and reliability of the entire flue gas treatment system.

[0028] This method utilizes the combustion stage angle function g(S) and the temperature-to-angle sensitivity coefficient (…). ) for the basic angle of the spray gun ( The system can be modified to automatically increase the spray angle of the spray gun during the high temperature and high flow stage of flue gas (such as the later stage of combustion) to expand the water mist coverage area, prevent high temperature flue gas from penetrating the mist field, and make the droplet distribution more uniform. This avoids problems such as wet walls, scaling or corrosion caused by localized concentrated water flow spraying onto the tower wall, thus extending the service life of the equipment.

[0029] This method creatively combines the combustion stage (S) and real-time flue gas temperature (S). As a dual decision factor, external ambient temperature was introduced. The multi-parameter coupled decision model can more comprehensively and accurately represent the actual operating conditions of the quench tower, enabling the start-up, shutdown, and angle adjustment of the spray guns to dynamically adapt to the entire life cycle process from combustion start-up, stable operation to shutdown cooling, achieving a leap from "coarse control" to "fine adjustment".

[0030] In step S2 of this invention, the method for determining the flow rate of the activated spray gun based on the temperature of the flue gas and the diameter of the particulate matter is as follows: Spray gun flow rate: , in, The flow coefficient of the spray gun nozzle. The working pressure of the spray gun, Atmospheric pressure, For the density of the flue gas, For temperature sensitivity coefficient, , Let A be the diameter of the particle, and B be empirical constants determined experimentally.

[0031] This method uses the temperature sensitivity coefficient ( ) and real-time monitored flue gas temperature ( Dynamically adjust the spray gun flow rate. When the flue gas temperature is extremely high, the spray gun flow rate is automatically increased, injecting more atomized droplets and absorbing a large amount of latent heat. This ensures that the flue gas rapidly passes through the dioxin resynthesis temperature range of 500℃ to 200℃ in a very short time (e.g., 1-2 seconds), thereby effectively suppressing dioxin formation. The diameter of the particles in ( The evaporation efficiency and penetration of the droplets are correlated. The empirical constants A and B ensure that the droplet size can be optimally matched with the heat capacity of the flue gas, avoiding the impact of incompletely evaporated droplets on the quench tower wall or causing local over-wetting, thereby achieving a uniform and efficient quenching effect.

[0032] This method also takes into account the working pressure of the spray gun ( Atmospheric pressure ) and smoke density ( ) and other parameters, and based on the flow coefficient of the spray gun nozzle ( This inherent property is calibrated to achieve "on-demand spraying" rather than continuous full-power operation. This not only greatly saves coolant consumption and reduces operating costs, but more importantly, it avoids the subsequent "bag clogging" of the bag filter due to excessive spraying.

[0033] In step S3 of this invention, the angle of the activated spray gun is adjusted to increase the angle between the spray gun and the flue gas flow path, and additional point spray is performed. The method for determining the area and flow rate of the additional point spray is as follows: Adjust the angle of the spray gun: , in, This is the initial angle of the spray gun. Temperature threshold This represents the decrease in flue gas temperature. The temperature coefficient is determined experimentally. Area of ​​additional dotted spray: , in, The base area for dotted spraying. Area sensitivity coefficient; Additional point spray jet velocity: , in, For spray gun flow rate, This is the flow velocity sensitivity coefficient.

[0034] This method uses the decrease in flue gas temperature ( ) and preset temperature threshold ( The difference / ratio of ) serves as the core control signal, dynamically adjusting the spray gun angle. ) and additional spray from dot sprayers. When the actual cooling effect ( When expectations are not met (i.e.) < The system automatically increases the angle between the spray gun and the flue gas flow line and activates additional dotted spray. The increased spray gun angle prolongs the residence time of droplets in the high-temperature area, while the additional spray increases the total heat absorption per unit time. This provides strong and precise compensation for areas with insufficient cooling, ensuring that the flue gas temperature is always controlled below the critical temperature for dioxin resynthesis and guaranteeing the absolute reliability of the quenching process.

[0035] In addition, the flow rate of the additional point spray in this method ( ) and spray area ( The value is not fixed, but dynamically changes according to actual cooling needs, achieving intelligent "on-demand allocation." When the flue gas temperature decreases by a certain value ( When the temperature is low, only a small additional injection is needed for adjustment; when the flue gas temperature decreases by a certain value ( When the temperature is high, a large-area, high-flow-rate, high-power injection is initiated. This graded response mechanism avoids the energy waste of injecting at maximum power throughout the entire process regardless of the operating conditions. While ensuring the rapid cooling effect, it maximizes the conservation of coolant consumption and improves the overall system's operating economy.

[0036] In this invention, several spray guns 20 and dot sprayers 30 are connected to the supply end of the liquid supply device 50 through multiple parallel liquid supply lines 40. The long shaft 21 is embedded with a liquid supply channel connected to the liquid inlet of the spray gun 20. The outlet end of the liquid supply line 40 is connected to the liquid supply channel to supply coolant to the spray gun 20. Each of the multiple liquid supply lines 40 is equipped with a high-response liquid supply control valve 41 (which can be electrically or pneumatically controlled) for controlling the opening and closing of the liquid supply line 40. The enable end of the liquid supply control valve 41 on each liquid supply line 40 is connected to the corresponding control end of the control system. The opening and closing of the liquid supply line 40 is controlled by the liquid supply control valve 41 to realize the independent operation of the spray gun 20 and the dot sprayer 30. The liquid supply flow rate, pressure and flow rate can also be adjusted by controlling the opening degree of the liquid supply control valve 41.

[0037] In another preferred embodiment, the spray gun 20 / dot sprayer 30 is also connected to a compressed air source (not shown in the figure) via an air supply line to inject compressed air into the spray gun 20 / dot sprayer 30. Specifically, all spray guns 20 and dot sprayers 30 are connected to the compressed air source via independent air supply lines, and each air supply line is equipped with a high-response air supply control valve (which can be electrically or pneumatically controlled) to regulate the compressed air flow. The use of dual-fluid atomization technology (water + compressed air) results in small, uniformly distributed atomized particles and a large atomization coverage area, allowing for more complete atomization of the coolant, improving heat exchange efficiency, and significantly enhancing rapid cooling efficiency. Furthermore, when the spray gun 20 / dot sprayer 30 is idle, compressed air can be introduced to form a continuous airflow, preventing dust in the flue gas from clogging the nozzle orifices, reducing maintenance frequency, and extending the service life of the spray gun 20 / dot sprayer 30.

[0038] In this invention, the liquid supply device 50 includes a coolant tank 51 and a quench pump 52 for conveying the coolant in the coolant tank 51 to the quench tower 10. The quench pump 52 is connected to an outlet pipe 54 via a flange. The outlet pipe 54 of the quench pump 52 is connected to each liquid supply pipeline 40 via a distributor, forming a parallel liquid supply network. The coolant in the coolant tank 51 can be industrial water, which is pressurized by the quench pump 52 and then delivered to the spray gun 20 / point sprayer 30 through the outlet pipe 54 and the liquid supply pipeline 40. The quench pump 52 can be a CDL1-11 lightweight vertical multistage centrifugal pump.

[0039] Preferably, there are two quench pumps 52, which are connected in parallel and can operate in shifts, with one pump in use and the other on standby, ensuring the continuous and reliable operation of the system. More preferably, a check valve 53 (e.g., H44H type) is installed at the outlet of each quench pump 52 to prevent the liquid inside the pump from flowing back due to gravity and damaging the blades of the quench pump 52 if the quench pump 52 suddenly stops working, thus protecting the quench pump 52.

[0040] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A control method for a high-temperature flue gas quenching device of an incinerator, characterized by: The quenching device comprises a quenching tower provided with a spraying device, a liquid supply device connected with the quenching tower and providing cooling liquid for the spraying device, and a control system, the control ends of the control system being connected with the enabling ends of the quenching tower and the liquid supply device respectively, the spraying device being capable of spraying atomized cooling liquid into the quenching tower to cool high-temperature flue gas in the quenching tower; The spraying device comprises a plurality of independently-operable spraying guns arranged on the side wall of the quenching tower and a point-like sprayer arranged at the top or bottom of the quenching tower, the angle and flow rate of each spraying gun being capable of being adjusted individually, the point-like sprayer being capable of point-like spraying and the area and flow rate of the spraying being capable of being adjusted; A flue gas inlet temperature sensor is arranged at the flue gas inlet of the quenching tower or on a pipeline connected with the flue gas inlet, a flue gas outlet temperature sensor is arranged at the flue gas outlet of the quenching tower or on a pipeline connected with the flue gas outlet, and a plurality of flue gas height direction distributed tower flue gas temperature sensors are arranged in the quenching tower, the signal output ends of the flue gas inlet temperature sensor, the flue gas outlet temperature sensor and the tower flue gas temperature sensors being connected with the corresponding flue gas temperature input ends of the control system; The control system determines the number, angle and flow rate of the spraying guns according to the combustion stage of the incinerator and the temperature of the flue gas entering the quenching tower, and the specific control method is as follows: S1, obtaining the combustion stage of the incinerator and the temperature and particle diameter of the flue gas entering the quenching tower; S2, determining the number and initial angle of the spraying guns to be turned on according to the combustion stage and the temperature of the flue gas, and determining the flow rate of the spraying guns to be turned on according to the temperature and particle diameter of the flue gas; S3, obtaining the flue gas temperature at different heights in the quenching tower during the spraying process; If the reduction of the flue gas temperature is lower than a temperature threshold, the angle of the spraying guns to be turned on is adjusted to increase the included angle between the spraying guns and the flue gas flow line and perform additional point-like spraying, the area and flow rate of the additional point-like spraying are determined, and the step S3 is returned to; If the reduction of the flue gas temperature is greater than or equal to the temperature threshold, the step S1 is returned to.

2. The control method of the incinerator high-temperature flue gas quenching device according to claim 1, characterized by, The method for determining the number and initial angle of the spraying guns to be turned on according to the combustion stage and the temperature of the flue gas is as follows: Number of open spray guns: , wherein, is the number of base work lances, is the temperature sensitivity coefficient, is the external ambient temperature, is the flue gas temperature entering the quench tower, is the theoretical maximum flue gas temperature entering the quench tower, Combustion phase influence function , Initial angle of the open spray gun: , wherein is the base angle of the spray gun, is the temperature sensitivity coefficient for the angle, Combustion phase versus angle influence function .

3. The control method of the incinerator high-temperature flue gas quenching device according to claim 1, characterized by, The method for determining the flow rate of the spraying guns to be turned on according to the temperature and particle diameter of the flue gas is as follows: Spray gun flow rate: , wherein, is the flow coefficient of the lance nozzle, is the working pressure of the lance, is the atmospheric pressure, is the flue gas density, is the temperature sensitivity coefficient, , is the particle diameter, A, B are empirical constants determined according to experiments.

4. The control method of the incinerator high-temperature flue gas quenching device according to claim 1, characterized by, The method for adjusting the angle of the spraying guns to be turned on to increase the included angle between the spraying guns and the flue gas flow line and perform additional point-like spraying, and determining the area and flow rate of the additional point-like spraying is as follows: Adjusting the angle of the post-shower gun: , wherein, is the initial angle of the lance, is the temperature threshold, is the reduction of the flue gas temperature, is the temperature coefficient, determined according to experiments; Area of additional point-like spray jet: , wherein is the base area of the point spray jet, is the area sensitivity factor; Flow rate of additional point spray injection: , wherein, is the flow rate of the lance, is the flow rate sensitivity coefficient.

5. The control method of the incinerator high-temperature flue gas quenching device according to claim 1, characterized by, A plurality of motors corresponding to the spraying guns are mounted outside the quenching tower, the output shafts of the motors are coaxially fixedly connected with long shafts penetrating through the side wall of the quenching tower and extending into the quenching tower, the long shafts are fixedly connected with the spraying guns, and are used for adjusting the pitch angle of the spraying guns.

6. The control method of the incinerator high-temperature flue gas quenching device according to claim 1, characterized by, The plurality of spraying guns and the point-like sprayer are connected with the liquid supply end of the liquid supply device through a plurality of liquid supply pipelines arranged in parallel, the liquid supply pipelines are each provided with a liquid supply control valve used for controlling the opening and closing of the liquid supply pipeline, and the enabling ends of the liquid supply control valves on the liquid supply pipelines are respectively connected with the corresponding control ends of the control system; The spraying guns / point-like sprayers are also connected with a compressed air source through a gas conveying pipeline to inject compressed air into the spraying guns / point-like sprayers.

7. The control method of the incinerator high-temperature flue gas quenching device according to claim 1, characterized by, The liquid supply device comprises a cooling liquid tank and a quenching pump for conveying the cooling liquid in the cooling liquid tank to the quenching tower, and an outlet pipeline of the quenching pump is connected with each liquid supply pipeline through a flow divider.

8. The control method of the incinerator high-temperature flue gas quenching device according to claim 7, characterized by, The number of the quenching pumps is two, and the two quenching pumps are arranged in parallel and can work in time division.

9. The control method of the incinerator high-temperature flue gas quenching device according to claim 7, characterized by, A check valve is arranged at the outlet of the quenching pump.

10. The control method of the incinerator high-temperature flue gas quenching device according to any one of claims 1 to 9, characterized by, The high-temperature flue gas entering the quenching tower moves from bottom to top, the spray gun is installed above the flue gas inlet, and the point-like sprayer is installed at the top of the quenching tower and sprays downward.

Images