Anti-blocking device

Abstract

The utility model discloses an anti-blocking device. The anti-blocking device comprises a gas tank and a differential pressure gauge. The gas tank comprises a tank body, a gas spraying pipe and a first switch. The gas ejector pipe is communicated with the tank body and extends into the reaction container, and an outlet of the gas ejector pipe faces a preset position. The first switch is connected with the gas ejector pipe, and the differential pressure gauge is used for detecting the differential pressure value. When the preset position in the reaction container is blocked, the differential pressure value detected by the differential pressure gauge is increased, and as the differential pressure gauge is electrically connected with the first switch, when the differential pressure value of the differential pressure gauge is greater than the preset differential pressure value, the preset position can be judged to be blocked, so that the first switch can be turned on, and the gas ejector pipe is in a closed state; the pressure of the compressed gas in the tank body is instantly converted into jet flow kinetic energy, strong impact force can be generated to impact obstructions, and blockage breaking, flow aiding and blockage prevention are achieved. Blockage removal is realized by controlling on and off of the first switch, manual blockage removal can be liberated, safety and reliability can be realized, normal and stable removal of SO2 in the desulfurizing absorption tower can be ensured, and environmental pollution is prevented.

Description

Technical Field

[0001] The present application belongs to the technical field of tail gas treatment, and specifically relates to an anti-blocking device. Background Art

[0002] The exhaust gas combustion furnace burns the exhaust gas to obtain flue gas. The desulfurization of the flue gas discharged from the exhaust gas combustion furnace usually adopts dry desulfurization. In the dry desulfurization system, slaked lime is fed into the desulfurization absorption tower through a feeder to establish a slaked lime bed layer. At the same time, process water is sprayed into the bottom of the desulfurization absorption tower in an atomized manner. Under the high temperature flue gas, the process water reacts with the SO in the flue gas. 2 The reaction generates sulfuric acid and sulfurous acid, which react violently with slaked lime to generate calcium sulfite and calcium sulfate, etc., to remove SO 2 , effectively reducing SO 2 Emissions play a positive role in preventing acid rain and protecting the environment.

[0003] The desulfurization ash (including calcium sulfite and calcium sulfate, etc.) generated in the desulfurization absorption tower is in full contact with the process water. After long-term operation, a large amount of desulfurization ash adheres to the tower wall around the process water pipe of the absorption tower and the tower wall around the nozzle. As time goes by, more and more desulfurization ash adheres to the tower wall around the process water pipe and the tower wall around the nozzle, covering the process water nozzle and even blocking the nozzle, preventing the injection of process water into the desulfurization absorption tower, affecting the occurrence of dry desulfurization in the desulfurization absorption tower.

[0004] In the related art, when the nozzle of the process water is clogged, the manhole of the desulfurization absorption tower is opened and cleared by manpower, which is inconvenient to operate, labor-intensive and poses serious safety hazards. Utility Model Content

[0005] In order to solve the technical problem that when the nozzle of the process water in the desulfurization absorption tower is blocked, it is necessary to rely on manpower to clear the blockage, which is inconvenient to operate, consumes manpower and has serious safety hazards, the present application provides an anti-blocking device for clearing the blockage in the reaction container, and the anti-blocking device includes:

[0006] A gas tank, comprising a tank body, an air jet pipe and a first switch, wherein the air jet pipe is connected to the tank body, extends into the reaction container and has an outlet facing a preset position; the first switch is connected to the air jet pipe and is used to control the on and off of the air jet pipe;

[0007] a differential pressure gauge, installed at the outlet of the reaction container, electrically connected to the first switch, and used to detect the differential pressure value at the outlet of the reaction container;

[0008] When the differential pressure value of the differential pressure gauge is greater than a preset differential pressure value, the first switch is turned on and the jet pipe is in a passage state.

[0009] In some embodiments, the gas tank further comprises:

[0010] An air inlet pipe, connected to the tank body;

[0011] The second switch is provided with a gas delivery port with adjustable opening. The second switch is connected in series to the air intake pipe and controls the gas delivery volume of the air intake pipe by adjusting the opening of the gas delivery port.

[0012] In some embodiments, the anti-blocking device further comprises:

[0013] A pressure detection component, connected to the tank body, for detecting the pressure value inside the tank body;

[0014] a timer, electrically connected to the first switch;

[0015] The pressure detection component is electrically connected to the timer. When the pressure value is a preset pressure value and the timer reaches a preset time interval, the first switch is turned on and the jet pipe is in a pass state.

[0016] In some embodiments, the second switch is a manual ball valve, and the gas flow rate of the air intake pipe is controlled by adjusting the valve body opening of the manual ball valve.

[0017] In some embodiments, the anti-blocking device further comprises:

[0018] A controller is electrically connected to the first switch, the differential pressure gauge and the pressure detection component; or is electrically connected to the first switch, the differential pressure gauge and the timer.

[0019] In some embodiments, the gas tank is an air cannon, the jet pipe is a gun barrel, and the first switch is an exhaust solenoid valve connected in series to the gun barrel.

[0020] In some embodiments, at least two groups of the gas tanks are provided, and outlets of at least two groups of the gas injection pipes face toward the preset position.

[0021] In some embodiments, when the gas tank is provided with two groups and respectively recorded as a first gas tank and a second gas tank, the preset pressure difference value is provided with a first pressure difference value and a second pressure difference value, and the second pressure difference value is greater than the first pressure difference value;

[0022] When the pressure difference value of the differential pressure gauge is greater than the first pressure difference value and less than the second pressure difference value, the jet pipe of the first gas tank is in a flow state; when the pressure difference value of the differential pressure gauge is greater than the second pressure difference value, the jet pipe of the first gas tank is in a flow state and the jet pipe of the second gas tank is in a flow state.

[0023] In some embodiments, the reaction container is a desulfurization absorption tower, the preset position is a process water pipe, and the outlets of at least two groups of the jet pipes are respectively arranged on the left and right sides above the process water pipe.

[0024] In some embodiments, the reaction container is a desulfurization absorption tower, and the gas in the tank is nitrogen.

[0025] According to the anti-blocking device provided by one or more embodiments of the present application, the anti-blocking device includes a gas tank and a differential pressure gauge. The gas tank includes a tank body, an air jet and a first switch. The air jet is connected to the tank body, and the air jet extends into the reaction vessel and the outlet faces the preset position. The first switch is connected to the air jet to control the on and off of the air jet. The differential pressure gauge is installed at the outlet of the reaction vessel, and the differential pressure gauge is electrically connected to the first switch to detect the differential pressure value at the outlet of the reaction vessel. When the preset position in the reaction vessel is blocked, the differential pressure value of the outlet of the reaction vessel detected by the differential pressure gauge will increase. Since the differential pressure gauge is electrically connected to the first switch, when the differential pressure value of the differential pressure gauge is greater than the preset differential pressure value, it can be determined that the preset position is blocked, so that the first switch can be opened, the air jet is in a passage state, and the pressure of the compressed gas in the tank body is instantly converted into jet kinetic energy, which can generate a strong impact force to impact the obstruction, thereby achieving blockage-breaking and flow-assisting anti-blocking. By controlling the opening and closing of the first switch to achieve clearing, it can be achieved to liberate manpower for clearing, which is safe and reliable, and can ensure the normal and stable removal of SO in the desulfurization absorption tower. 2 , prevent environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the anti-blocking device in one or more embodiments of the present application.

[0027] Description of reference numerals:

[0028] 10. Desulfurization absorption tower; 11. Tank body; 12. Jet pipe; 13. First switch; 14. Air intake pipe; 15. Second switch;

[0029] 20. Differential pressure gauge;

[0030] 30. Pressure detection component; 50. Controller; 60. Process water pipe. DETAILED DESCRIPTION

[0031] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] The exhaust gas combustion furnace burns the exhaust gas to obtain flue gas. The desulfurization of the flue gas discharged from the exhaust gas combustion furnace usually adopts dry desulfurization. In the dry desulfurization system, slaked lime is fed into the desulfurization absorption tower through a feeder to establish a slaked lime bed layer. At the same time, process water is sprayed into the bottom of the desulfurization absorption tower in an atomized manner. Under the high temperature flue gas, the process water reacts with the SO in the flue gas. 2 The reaction generates sulfuric acid and sulfurous acid, which react violently with slaked lime to generate calcium sulfite and calcium sulfate, etc., to remove SO 2 , effectively reducing SO 2 Emissions play a positive role in preventing acid rain and protecting the environment.

[0033] The desulfurization ash (including calcium sulfite and calcium sulfate, etc.) generated in the desulfurization absorption tower is in full contact with the process water. After long-term operation, due to frequent changes in the incinerator load, the flue gas flow rate fluctuates greatly, and a large amount of desulfurization ash adheres to the tower wall around the process water pipe of the absorption tower and the tower wall around the nozzle. As time goes by, more and more desulfurization ash adheres to the tower wall around the process water pipe and the tower wall around the nozzle, covering the nozzle of the process water and blocking the nozzle, preventing the injection of process water in the desulfurization absorption tower, and affecting the occurrence of dry desulfurization in the desulfurization absorption tower. In severe cases, the desulfurization ash completely blocks the throat of the Venturi section of the desulfurization absorption tower, causing abnormalities in the dry desulfurization system, which in turn causes abnormalities in the tail gas combustion furnace, forcing the desulfurization absorption tower and tail gas combustion furnace to be shut down for clearing, seriously affecting safe and stable production.

[0034] In the related art, when the nozzle of the process water is clogged, the manhole of the desulfurization absorption tower is opened and cleared by manpower, which is inconvenient to operate, labor-intensive and poses serious safety hazards.

[0035] In order to solve the technical problem that when the nozzle of the process water in the desulfurization absorption tower is blocked, it is necessary to clear the blockage manually, which is inconvenient, labor-intensive and has serious safety hazards, please refer to Figure 1 The present application provides an anti-blocking device, which includes a gas tank and a differential pressure gauge 20. The gas tank includes a tank body 11, an air jet 12 and a first switch 13. The air jet 12 is connected to the tank body 11, and the air jet 12 extends into the reaction container and the outlet faces a preset position. The first switch 13 is connected to the air jet 12 and is used to control the on and off of the air jet 12. The differential pressure gauge 20 is installed at the outlet of the reaction container, and the differential pressure gauge 20 is electrically connected to the first switch 13, and is used to detect the differential pressure value at the outlet of the reaction container.

[0036] When a blockage occurs at a preset position in the reaction container, the pressure difference value at the outlet of the reaction container detected by the pressure difference gauge 20 will increase. Since the pressure difference gauge 20 is electrically connected to the first switch 13, when the pressure difference value of the pressure difference gauge 20 is greater than the preset pressure difference value, it can be determined that a blockage occurs at the preset position. In this way, the first switch 13 can be opened, the jet pipe 12 is in a passage state, and the pressure of the compressed gas in the tank body 11 is instantly converted into jet kinetic energy, which can generate a strong impact force to impact the obstruction and achieve blockage breaking, flow assistance and anti-blockage. By controlling the opening and closing of the first switch 13 to achieve blockage clearing, it can be achieved by freeing manpower for blockage clearing, which is safe and reliable, and can ensure the normal and stable removal of SO in the desulfurization absorption tower 10. 2 , and prevent environmental pollution. This ensures the normal operation of the tail gas combustion furnace, ensures safe and stable production, and can increase the efficiency of desulfurization ash use, reduce desulfurization ash consumption, and thus improve the operation rate of the dry desulfurization system; while ensuring the operating kinetic energy, it reduces energy consumption.

[0037] Since manpower is freed up for clearing blockages, there is no need to frequently open the manhole door of the desulfurization absorption tower 10 to check and clear blockages, thereby ensuring personnel safety; at the same time, frequent opening of the manhole door of the desulfurization absorption tower 10 is avoided, thereby ensuring that the environmental protection indicators of the exhaust gas are normal.

[0038] In order to facilitate the electrical connection between the differential pressure gauge 20 and the first switch 13, the anti-blocking device also includes a controller 50, through which the differential pressure gauge 20 is electrically connected to the first switch 13, and the controller 50 controls the opening and closing of the first switch 13 according to the differential pressure value and the preset differential pressure value detected by the differential pressure gauge 20. It should be noted that the preset differential pressure value can be set according to actual conditions, and this application does not limit it. The type of controller 50 can also be set according to actual needs, and this application does not limit it.

[0039] The reaction vessel is a desulfurization absorption tower 10, and the preset position is a process water pipe 60. When the nozzle of the process water is blocked, the pressure difference value detected by the differential pressure gauge 20 is greater than the preset pressure difference value, and the controller 50 controls the first switch 13 to open, so that the impact force generated by the compressed gas in the tank body 11 impacts the tower wall around the process water pipe 60 in the desulfurization absorption tower 10 and the desulfurization ash obstruction adhered to the tower wall around the nozzle, thereby breaking the blockage, assisting the flow and preventing the blockage. Two groups of gas tanks can be provided, and the outlets of the jet pipes 12 connected to the two groups of gas tanks are respectively arranged on the left and right sides above the process water pipe 60 to increase the impact force and improve the efficiency of clearing the blockage. Multiple groups of gas tanks can also be provided, and the outlets of multiple jet pipes 12 are oriented toward the preset position to increase the impact force and improve the efficiency of clearing the blockage.

[0040] When two groups of gas tanks are provided and are respectively recorded as the first gas tank and the second gas tank, the preset pressure difference value is provided with a first pressure difference value and a second pressure difference value, and the second pressure difference value is greater than the first pressure difference value.

[0041] When the differential pressure value of the pressure gauge is greater than the first differential pressure value and less than the second differential pressure value, the jet pipe of the first gas tank is in a pass state. When the differential pressure value of the pressure gauge is greater than the second differential pressure value, it means that there are many desulfurization ash obstructions bonded to the tower wall around the process water pipe 60 and the tower wall around the nozzle in the desulfurization absorption tower 10, and the jet pipe of the first gas tank and the jet pipe of the second gas tank need to be in a pass state, so that the impact force generated by the compressed gas in the tank body 11 of the first gas tank and the tank body 11 of the second gas tank respectively impacts the desulfurization ash obstructions bonded to the tower wall around the process water pipe 60 and the tower wall around the nozzle in the desulfurization absorption tower 10, thereby increasing the impact force on the desulfurization ash obstructions and achieving blockage breaking, flow-aiding and anti-blockage.

[0042] It should be noted that multiple groups of gas tanks can be provided, and different numbers of gas tanks can be opened for different preset pressure difference values ​​to increase the impact force on the desulfurization ash obstruction and achieve blockage breaking, flow assistance and anti-blockage. The number of gas tanks is not limited in this application and can be set according to actual needs.

[0043] In some embodiments, the preset position may also be other positions in the desulfurization absorption tower 10 that are prone to blockage, such as the outlet of the air distribution plate at the bottom of the bag filter and the material flow regulating valve of the ash hopper. Specifically, the outlet of the air distribution plate at the bottom of the bag filter in the dry desulfurization system is prone to blockage, and the slaked lime cannot enter the desulfurization absorption tower 10 normally, affecting the circulation of the slaked lime, resulting in the thinning of the slaked lime bed in the desulfurization absorption tower 10, and the reduction of the inlet and outlet pressure difference, causing a large fluctuation in the negative pressure in the desulfurization absorption tower 10, SO 2 The treatment efficiency is reduced. Due to the desulfurization reaction, water absorption, condensation and accumulation of desulfurized ash, the flow control valve (usually using flow control valve HV1850) of the ash hopper material in the dry desulfurization system is blocked, affecting the normal operation of the dry desulfurization system, resulting in SO 2 Processing efficiency decreases.

[0044] When the outlet of the air distribution plate at the bottom of the bag filter or the material flow regulating valve of the ash hopper is blocked, the controller 50 also controls to open the first switch 13, so that the impact force generated by the compressed gas in the tank 11 impacts the obstruction to achieve blockage-breaking and flow-assisting. The above method solves the problem of frequent material accumulation and blockage in the ash-water mixing section of the dry flue gas desulfurization absorption tower 10, ensures the safe operation of the tail gas combustion furnace and the desulfurization absorption tower 10, and further ensures the desulfurization efficiency in the dry flue gas desulfurization system.

[0045] In order to prevent the compressed gas in the tank body 11 from affecting the emission index of the flue gas discharged from the absorption tower outlet, the gas in the tank body 11 can be nitrogen or other gases in the exhaust flue gas that do not participate in the emission index detection, and this application does not limit it.

[0046] The gas tank can be an air cannon, the jet pipe 12 is a gun barrel, and the first switch 13 is an exhaust solenoid valve connected in series to the gun barrel. The air cannon uses the principle of aerodynamics, with nitrogen as the medium, a differential pressure device and an exhaust solenoid valve that can be automatically controlled, which instantly converts the nitrogen pressure energy into jet kinetic energy, and can generate a strong impact force. It is a clean, pollution-free, low-energy-consuming blockage-breaking device. It should be noted that the type of gas tank can also be set according to actual needs, and this application does not limit it.

[0047] See also Figure 1 The gas tank further includes an air inlet pipe 14, which is connected to the tank body 11. The second switch 15 is provided with an air delivery port with adjustable opening, and the second switch 15 is connected in series to the air inlet pipe 14. By adjusting the opening of the air delivery port, the air delivery volume of the air inlet pipe 14 is controlled. The second switch 15 can be a manual ball valve, and by controlling the opening of the valve body of the manual ball valve, the nitrogen flow in the air inlet pipe 14 is adjusted, thereby controlling the stamping time in the tank body 11. The nitrogen in the tank body 11 can be taken from the nitrogen pipeline network, or provided by other means, which is not limited in this application.

[0048] In order to realize the automation of clearing the process water pipe 60 in the desulfurization absorption tower 10, please refer to Figure 1 The anti-blocking device also includes a pressure detection component 30 and a timer. The pressure detection component 30 can be a pressure gauge, which is connected to the tank body 11 and is used to detect the pressure value in the tank body 11. The timer is electrically connected to the first switch 13. The pressure detection component 30 is electrically connected to the timer. When the pressure value is a preset pressure value and the timer reaches a preset time interval, the first switch 13 is opened and the jet pipe 12 is in a passage state. The pressure of the compressed gas in the tank body 11 is instantly converted into jet kinetic energy, which can generate a strong impact force to impact the obstruction, thereby achieving blockage breaking, flow assistance and anti-blocking. The controller 50, the first switch 13, the differential pressure gauge 20, the pressure gauge and the timer are electrically connected.

[0049] The preset pressure value can be adjusted according to the actual situation. The manual ball valve on the air inlet pipe 14 connected to the tank body 11 is in a normally open state, so that the tank body 11 can be automatically replenished with a nitrogen source for pressurization. When the pressure in the tank body 11 reaches the preset pressure value and the timer reaches the preset time interval, the controller 50 controls the first switch 13 to open, so as to release the nitrogen in the tank body 11 and clear the obstruction at the same time. The above steps are repeated so that the nozzle position of the process water pipe 60 can be automatically cleared.

[0050] It should be noted that when the pressure difference value detected by the differential pressure gauge 20 is greater than the preset pressure difference value, but the pressure in the tank body 11 has not reached the preset pressure value, the controller 50 can directly control the first switch 13 to open, so that the nitrogen in the tank body 11 is discharged to impact the obstruction, thereby breaking the blockage, assisting the flow and preventing the blockage. At this time, the pressure detection component 30 re-measures the pressure value in the tank body 11, and the timer restarts the timing. When the pressure difference value detected by the differential pressure gauge 20 is less than the preset pressure difference value, but the pressure in the tank body 11 is greater than the preset pressure value and the timer reaches the preset time interval, the controller 50 can directly control the first switch 13 to open, so that the nitrogen in the tank body 11 is discharged to impact the obstruction, thereby breaking the blockage, assisting the flow and preventing the blockage.

[0051] It should be noted that the timer can be a time relay, which can be electrically connected to the controller 50. The time relay sets a time interval. When the pressure value is a preset pressure value and the timer reaches the set time interval, the controller 50 controls the first switch 13 to open, thereby realizing automatic and timely clearing of the blockage. By adjusting the time interval of the time relay, the frequency of automatic clearing of the blockage can be realized, and the adjustment is flexible, thereby realizing effective clearing of the blockage.

[0052] It should be noted that when the pressure difference value detected by the differential pressure gauge 20 is greater than the preset pressure difference value, but the pressure in the tank body 11 has not reached the preset pressure value, the controller 50 can directly control the first switch 13 to open, so that the nitrogen in the tank body 11 is discharged to impact the obstruction, thereby breaking the blockage, assisting the flow and preventing the blockage. At this time, the pressure detection component 30 re-measures the pressure value in the tank body 11, and the timer restarts the timing. When the time relay reaches the time point of the time interval, but the pressure in the tank body 11 has not reached the preset pressure value, it is necessary to wait for the pressure in the tank body 11 to reach the preset pressure value, and the controller 50 controls the first switch 13 to open, so that the nitrogen in the tank body 11 is discharged to impact the obstruction, thereby breaking the blockage, assisting the flow and preventing the blockage.

[0053] In order to improve the convenience of clearing the process water pipe 60 in the desulfurization absorption tower 10, the pressure detection component 30 and the timer are respectively connected to the controller 50, so that the controller 50 detects the pressure difference value and the preset pressure difference value according to the differential pressure gauge 20, and the pressure detection component 30 detects the pressure in the tank body 11 and the preset pressure value, the timing time of the timer, and combines the control logic to realize the control of the opening and closing of the first switch 13.

[0054] The anti-blocking device of the present application has a simple structure, low investment, small space occupation, low energy consumption, convenient inspection and maintenance, and does not affect the normal operation of the dry desulfurization system, and is safe and stable.

[0055] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0056] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An anti-blocking device for clearing blockage in a reaction vessel, characterized in that: include: A gas tank, comprising a tank body, an air jet pipe and a first switch, wherein the air jet pipe is connected to the tank body, extends into the reaction container and has an outlet facing a preset position; the first switch is connected to the air jet pipe and is used to control the on and off of the air jet pipe; a differential pressure gauge, installed at the outlet of the reaction container, electrically connected to the first switch, and used to detect the differential pressure value at the outlet of the reaction container; When the differential pressure value of the differential pressure gauge is greater than a preset differential pressure value, the first switch is turned on and the air injection pipe is in a passage state.

2. The anti-blocking device according to claim 1, characterized in that: The gas tank also includes: An air inlet pipe, connected to the tank body; The second switch is provided with a gas delivery port with adjustable opening. The second switch is connected in series to the air intake pipe and controls the gas delivery volume of the air intake pipe by adjusting the opening of the gas delivery port.

3. The anti-blocking device according to claim 2, characterized in that: The anti-blocking device also includes: A pressure detection component, connected to the tank body, for detecting the pressure value inside the tank body; a timer, electrically connected to the first switch; The pressure detection component is electrically connected to the timer. When the pressure value is a preset pressure value and the timer reaches a preset time interval, the first switch is turned on and the jet pipe is in a pass state.

4. The anti-blocking device according to claim 3, characterized in that: The second switch is a manual ball valve, and the gas delivery volume of the intake pipe is controlled by adjusting the valve body opening of the manual ball valve.

5. The anti-blocking device according to claim 3, characterized in that: The anti-blocking device also includes: A controller is electrically connected to the first switch, the differential pressure gauge and the pressure detection component; or is electrically connected to the first switch, the differential pressure gauge and the timer.

6. The anti-blocking device according to claim 1, characterized in that: The gas tank is an air cannon, the jet pipe is a gun barrel, and the first switch is an exhaust solenoid valve connected in series to the gun barrel.

7. The anti-blocking device according to any one of claims 1 to 6, characterized in that: At least two groups of the gas cylinders are provided, and outlets of at least two groups of the gas injection pipes face toward the preset position.

8. The anti-blocking device according to claim 7, characterized in that: The gas tank is provided with two groups and is respectively recorded as a first gas tank and a second gas tank, the preset pressure difference value is provided with a first pressure difference value and a second pressure difference value, and the second pressure difference value is greater than the first pressure difference value; When the pressure difference value of the differential pressure gauge is greater than the first pressure difference value and less than the second pressure difference value, the jet pipe of the first gas tank is in a pass state; When the pressure difference value of the differential pressure gauge is greater than the second pressure difference value, the injection pipe of the first gas tank is in a flow state and the injection pipe of the second gas tank is in a flow state.

9. The anti-blocking device according to claim 8, characterized in that: The reaction container is a desulfurization absorption tower, the preset position is a process water pipe, and the outlets of at least two groups of the jet pipes are respectively arranged on the left and right sides above the process water pipe.

10. The anti-blocking device according to any one of claims 1 to 6, characterized in that: The reaction container is a desulfurization absorption tower, and the gas in the tank is nitrogen.

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