Temperature raising flue of chain hot water boiler denitration device

Abstract

The utility model provides a temperature raising flue of a chain hot water boiler denitration device. The temperature raising flue of the chain hot water boiler denitration device comprises a bottom plate; the chain hot water boiler comprises a chain hot water boiler body, the chain hot water boiler body is installed at the top of the bottom plate, a smoke exhaust pipe is installed at the top of the chain hot water boiler body, and the top end of the smoke exhaust pipe is fixedly connected with a left side butt joint pipe and a right side butt joint pipe. According to the temperature raising flue of the chain hot water boiler denitration device, the service life of the temperature raising flue is greatly prolonged after the temperature raising flue is made of A310 heat-resistant stainless steel through the design, the denitration chemical reaction temperature is guaranteed, the environment-friendly requirement for ultralow emission of flue gas is met, meanwhile, the cleaning frequency of the temperature raising pipeline is reduced through filtering of the filtering assembly, and the service life of the temperature raising flue is prolonged. The flow of the high-temperature flue gas is controlled through a left regulating valve and a right regulating valve, the high-temperature flue gas enters a left SCR denitration reactor and a right SCR denitration reactor, the SCR denitration reaction is controlled to be 300-400 DEG C, and normal operation of the SCR denitration reaction is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of denitrification and temperature-raising flue gas ducts for chain hot water boilers, and in particular to a temperature-raising flue gas duct for a denitrification device of a chain hot water boiler. Background Technology

[0002] Chain grate hot water boilers are a type of stoker-fired boiler with a high degree of mechanization. They are named for their grate, which resembles a chain track. They are a widely used type of combustion equipment in industrial boilers, specifically a chain grate boiler, which is a type of stoker-fired boiler and belongs to the category of mechanical combustion grate boilers.

[0003] Because the flue gas from the heating chain hot water boiler needs to be denitrified to meet the ultra-low emission requirements, the denitrification reaction temperature needs to be controlled above 300℃ to meet the chemical reaction requirements.

[0004] The original heating flue was made of ordinary stainless steel, which is prone to deformation when the heating temperature is around 500-550℃. In addition, the smoke and dust directly enter the heating pipe, which is inconvenient for later cleaning and affects the normal heating.

[0005] Therefore, it is necessary to provide a temperature-raising flue for a chain grate hot water boiler denitrification device to solve the above-mentioned technical problems. Utility Model Content

[0006] This utility model provides a heating flue for a denitrification device of a chain grate hot water boiler, which solves the problems of traditional stainless steel chain grate hot water boiler heating flues being prone to deformation when the temperature is stably increased to the corresponding level, and the inconvenience of cleaning the flue when smoke and dust enter the heating pipe.

[0007] To solve the above-mentioned technical problems, the heating flue of the chain grate hot water boiler denitrification device provided by this utility model includes: a base plate;

[0008] The chain grate hot water boiler body is mounted on top of a base plate. A flue pipe is installed on the top of the chain grate hot water boiler body. A left-side connecting pipe and a right-side connecting pipe are fixedly connected to the top of the flue pipe. An installation pipe is installed at the other end of each of the left-side and right-side connecting pipes via a connector. A filter assembly is fixedly connected to the other end of each of the two installation pipes. The filter assembly includes an installation structure, a conical interceptor, a discharge pipe, and a sealing component. The installation structure is used to install the conical interceptor and the discharge pipe. The conical interceptor is used to intercept particles in the flue gas. The sealing component is used to seal the other end of the discharge pipe.

[0009] A right-side heating pipe is fixedly connected to the top of one of the filter components. The other end of the right-side heating pipe is connected to a right-side SCR reactor via a right-side regulating valve. A left-side heating pipe is installed on the top of the other filter component. The other end of the left-side heating pipe is connected to a left-side SCR reactor via a left-side regulating valve.

[0010] The connector is also made of A310 heat-resistant stainless steel. The discharge pipe will discharge the intercepted particles. The staff only needs to open the sealing parts periodically for cleaning. Before the denitrification retrofit, the denitrification reaction temperature of the chain grate hot water boiler was difficult to reach above 300℃ due to the layout of the heat exchange device at the tail of the boiler. The denitrification chemical reaction could not proceed normally. At the same time, the denitrification reaction temperature was too low and ammonium salt crystals were easily generated, which affected the catalyst activity. After the material of the left and right heating flues and their connecting pipes was optimized and replaced from traditional ordinary stainless steel to A310 heat-resistant stainless steel.

[0011] Preferably, both the right-side SCR reactor and the left-side SCR reactor are fixedly connected to a discharge pipe at the other end, and both discharge pipes are fixedly connected to a docking plate at the other end.

[0012] The connecting plate facilitates the connection between the discharge pipe and the corresponding pipe. The discharge pipe is made of A310 heat-resistant stainless steel.

[0013] Preferably, mounting components are installed at the bottom of both the right-side SCR reactor and the left-side SCR reactor, the mounting components being used to fix the right-side SCR reactor and the left-side SCR reactor in their corresponding positions.

[0014] Preferably, a fixing base is fixedly connected to the front of each filter assembly, and a temperature sensor is installed on the front of the fixing base.

[0015] Temperature sensors are used to monitor the temperature inside the filter assembly.

[0016] Preferably, a control box is fixedly connected to the top of each base plate, and a door is rotatably connected to the front of the control box;

[0017] The control box contains power switches and controllers for operating the equipment.

[0018] Preferably, a mounting base is installed on one side of the control box, and an operation screen is installed on one side of the mounting base;

[0019] The control panel is used to display the operating parameters of the equipment on the base plate.

[0020] Compared with related technologies, the temperature-raising flue of the chain grate hot water boiler denitrification device provided by this utility model has the following beneficial effects:

[0021] This utility model provides a heating flue for a chain grate hot water boiler denitrification device. To avoid high-temperature deformation of the heating flue and reduce the cleaning frequency, Grade A heat-resistant stainless steel is used as the material for the left and right side connecting pipes, left and right installation pipes, filter components, and left and right heating pipes, thus preventing high-temperature deformation. A filter component is installed between the left and right heating pipes and the left and right connecting pipes. This filter component uses a conical interceptor to intercept larger particulate matter in the flue gas, reducing the cleaning frequency of the heating pipes and the SCR reactor. By using A310 heat-resistant stainless steel, the lifespan of the heating flue is greatly extended, ensuring the denitrification chemical reaction temperature and meeting the environmental protection requirements for ultra-low emissions. The filter component also reduces the cleaning frequency of the heating pipes. The high-temperature flue gas flow is controlled by left and right regulating valves and enters the left and right SCR denitrification reactors, controlling the SCR denitrification reaction between 300°C and 400°C to ensure normal operation. Attached Figure Description

[0022] Figure 1 A schematic diagram of a preferred embodiment of the heating flue of the chain grate hot water boiler denitrification device provided by this utility model;

[0023] Figure 2 This invention provides a structural schematic diagram of the left-side heating tube;

[0024] Figure 3 Provided for this utility model Figure 1 An enlarged view of point A shown;

[0025] Figure 4 Provided for this utility model Figure 1 An enlarged view of point B shown;

[0026] Figure 5 A schematic diagram of the conical interception component provided for this utility model.

[0027] Numbered in the diagram: 1. Base plate, 2. Chain-gear hot water boiler body, 3. Exhaust pipe, 4. Connector, 5. Mounting pipe, 6. Filter assembly, 601. Mounting structure, 602. Conical interceptor, 603. Discharge pipe, 604. Sealing component, 7. Right-side regulating valve, 8. Mounting assembly, 9. Discharge pipe, 10. Connecting plate, 11. Right-side SCR reactor, 12. Right-side heating pipe, 13. Right-side connecting pipe, 14. Left-side connecting pipe, 15. Left-side SCR reactor, 16. Left-side regulating valve, 17. Fixed base, 18. Temperature sensor, 19. Mounting base, 20. Operation panel, 21. Control box, 22. Box door, 23. Left-side heating pipe. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of a preferred embodiment of the heating flue of the chain grate hot water boiler denitrification device provided by this utility model; Figure 2 This invention provides a structural schematic diagram of the left-side heating tube; Figure 3 Provided for this utility model Figure 1 An enlarged view of point A shown; Figure 4 Provided for this utility model Figure 1 An enlarged view of point B shown; Figure 5 This utility model provides a structural schematic diagram of the conical interception component. The heating flue of the chain grate hot water boiler denitrification device includes: a base plate 1;

[0030] A chain grate hot water boiler body 2 is installed on the top of a base plate 1. A flue pipe 3 is installed on the top of the chain grate hot water boiler body 2. A left connecting pipe 14 and a right connecting pipe 13 are fixedly connected to the top of the flue pipe 3. The other ends of the left connecting pipe 14 and the right connecting pipe 13 are each connected to an installation pipe 5 via a connector 4. The other ends of the two installation pipes 5 are each fixedly connected to a filter assembly 6. The filter assembly 6 includes an installation structure 601, a conical interceptor 602, a discharge pipe 603, and a sealing component 604. The installation structure 601 is used to install the conical interceptor 602 and the discharge pipe 603. The conical interceptor 602 is used to intercept particles in the flue gas. The sealing component 604 is used to seal the other end of the discharge pipe 603.

[0031] A right-side heating pipe 12 is fixedly connected to the top of one of the filter components 6. The other end of the right-side heating pipe 12 is connected to a right-side SCR reactor 11 via a right-side regulating valve 7. A left-side heating pipe 23 is installed on the top of the other filter component 6. The other end of the left-side heating pipe 23 is connected to a left-side SCR reactor 15 via a left-side regulating valve 16.

[0032] Connector 4 is also made of A310 heat-resistant stainless steel. The discharge pipe 603 discharges the intercepted particles. The staff only needs to open the sealing part 604 periodically for cleaning. Before the denitrification retrofit, the denitrification reaction temperature of the chain grate hot water boiler was difficult to reach above 300℃ due to the layout of the heat exchange device at the tail of the boiler. The denitrification chemical reaction could not proceed normally. At the same time, the denitrification reaction temperature was too low and ammonium salt crystals were easily generated, affecting the catalyst activity. After the material of the left and right heating flues and their connecting pipes was optimized and replaced from traditional ordinary stainless steel to A310 heat-resistant stainless steel, the service life of the heating flues was greatly improved, the denitrification chemical reaction temperature was guaranteed, and the environmental protection requirements for ultra-low emission of flue gas were met.

[0033] The other end of the right SCR reactor 11 and the left SCR reactor 15 are both fixedly connected to a discharge pipe 9, and the other end of the discharge pipe 9 is fixedly connected to a docking plate 10.

[0034] The connecting plate 10 facilitates the connection between the discharge pipe 9 and the corresponding pipe. The discharge pipe 9 is made of A310 heat-resistant stainless steel.

[0035] The bottom of both the right-side SCR reactor 11 and the left-side SCR reactor 15 is equipped with an installation assembly 8, which is used to fix the right-side SCR reactor 11 and the left-side SCR reactor 15 in the corresponding positions.

[0036] Mounting component 8 includes a mounting bracket and fixing fasteners.

[0037] Each filter assembly 6 has a fixed base 17 fixedly connected to its front side, and a temperature sensor 18 is installed on the front side of the fixed base 17.

[0038] Temperature sensor 18 is used to monitor the temperature inside filter assembly 6.

[0039] A control box 21 is fixedly connected to the top of each base plate 1, and a box door 22 is rotatably connected to the front of the control box 21.

[0040] The door 22 is equipped with a lock, and the control box 21 contains a power switch and a controller for controlling the operation of the equipment.

[0041] A mounting base 19 is installed on one side of the control box 21, and an operation panel 20 is installed on one side of the mounting base 19.

[0042] The operation panel 20 is used to display the operating parameters of the equipment on the base plate 1, and can also control the operating parameters of the equipment on the base plate 1.

[0043] The working principle of the heating flue of the chain grate hot water boiler denitrification device provided by this utility model is as follows:

[0044] A310 grade heat-resistant stainless steel is used as the material for the left and right side connecting pipes, left and right installation pipes, filter assembly 6, and left and right heating pipes to avoid high-temperature deformation. At the same time, a filter assembly 6 is installed between the left heating pipe 23 and the right heating pipe 12 and the left and right connecting pipes 14 and 13. The filter assembly 6 uses the cone-shaped intercepting component 602 inside the filter assembly 6 to intercept larger dust particles in the flue gas, reducing the cleaning frequency of the heating pipes and the SCR reactor. In actual use, the high-temperature flue gas will enter the left connecting pipe 14 and the right connecting pipe 13 through the exhaust pipe 3, and then be filtered by the filter assembly 6. During this process, the filtered high-temperature flue gas enters the left SCR reactor 15 and the right SCR reactor 11 through the left regulating valve 16 and the right regulating valve 7 as needed to assist the desulfurization device for desulfurization treatment.

[0045] Compared with related technologies, the temperature-raising flue of the chain grate hot water boiler denitrification device provided by this utility model has the following beneficial effects:

[0046] To prevent high-temperature deformation of the heating flue of the denitrification device in the chain grate hot water boiler and reduce the cleaning frequency, A310 heat-resistant stainless steel is used as the material for the left and right side connecting pipes, left and right installation pipes, filter assembly 6, and left and right heating pipes. This avoids high-temperature deformation. A filter assembly 6 is installed between the left heating pipe 23 and the right heating pipe 12 and the left and right connecting pipes 14 and 13. The filter assembly 6 uses a conical interceptor 602 inside to intercept larger particulate matter in the flue gas, reducing the cleaning frequency of the heating pipes and the SCR reactor. This design, using A310 heat-resistant stainless steel, significantly extends the lifespan of the heating flue, ensuring the denitrification chemical reaction temperature and meeting the environmental protection requirements for ultra-low emissions. The filter assembly 6 also reduces the cleaning frequency of the heating pipes. The high-temperature flue gas flow is controlled by left and right regulating valves and enters the left and right SCR denitrification reactors, controlling the SCR denitrification reaction between 300℃ and 400℃ to ensure normal operation.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A heating flue of a chain grate hot water boiler denitrification device, characterized in that, include: Base plate; The chain grate hot water boiler body is mounted on top of a base plate. A flue pipe is installed on the top of the chain grate hot water boiler body. A left-side connecting pipe and a right-side connecting pipe are fixedly connected to the top of the flue pipe. An installation pipe is installed at the other end of each of the left-side and right-side connecting pipes via a connector. A filter assembly is fixedly connected to the other end of each of the two installation pipes. The filter assembly includes an installation structure, a conical interceptor, a discharge pipe, and a sealing component. The installation structure is used to install the conical interceptor and the discharge pipe. The conical interceptor is used to intercept particles in the flue gas. The sealing component is used to seal the other end of the discharge pipe. A right-side heating pipe is fixedly connected to the top of one of the filter components. The other end of the right-side heating pipe is connected to a right-side SCR reactor via a right-side regulating valve. A left-side heating pipe is installed on the top of the other filter component. The other end of the left-side heating pipe is connected to a left-side SCR reactor via a left-side regulating valve.

2. The temperature-raising flue of the chain grate hot water boiler denitrification device according to claim 1, characterized in that, Both the right-side and left-side SCR reactors are fixedly connected to a discharge pipe at one end, and the other end of each discharge pipe is fixedly connected to a docking plate.

3. The temperature-raising flue of the chain grate hot water boiler denitrification device according to claim 1, characterized in that, The bottom of both the right-side SCR reactor and the left-side SCR reactor are equipped with mounting components, which are used to fix the right-side SCR reactor and the left-side SCR reactor in their respective positions.

4. The temperature-raising flue of the chain grate hot water boiler denitrification device according to claim 1, characterized in that, Each filter assembly has a fixed base fixedly connected to its front side, and a temperature sensor is installed on the front side of the fixed base.

5. The temperature-raising flue of the chain grate hot water boiler denitrification device according to claim 1, characterized in that, A control box is fixedly connected to the top of each base plate, and a door is rotatably connected to the front of the control box.

6. The temperature-raising flue of the chain grate hot water boiler denitrification device according to claim 5, characterized in that, A mounting base is installed on one side of the control box, and an operation panel is installed on one side of the mounting base.

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