Environment-friendly and energy-saving boiler with flue gas recirculation function
By installing flue gas recirculation components and filters inside the boiler, the problem of short flue gas residence time is solved, the full utilization of flue gas and efficient heat transfer are achieved, harmful gas emissions are reduced, and the goal of environmental protection and energy conservation is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-04-14
AI Technical Summary
In existing boilers, the flue gas produced by combustion has a short residence time inside the boiler, resulting in the flue gas not being fully utilized.
The environmentally friendly and energy-saving boiler design adopts flue gas recirculation, including a combustion chamber, circulation components and filters. Through components such as heated steel pipes, baffles, slow flow channels and mixing chambers, the flue gas flows in a tortuous manner in the boiler and exchanges heat with water. After mixing, it is recycled. Combined with bag filter dust collector, denitrification and desulfurization devices, multiple purification is carried out.
This increases the residence time of flue gas in the boiler, enhances heat utilization efficiency, reduces harmful gas emissions, and achieves environmental protection and energy-saving effects.
Smart Images
Figure CN224121395U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler technology, and in particular to an environmentally friendly and energy-saving boiler with flue gas recirculation. Background Technology
[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy. The hot water or steam produced in the boiler can directly provide the heat energy required for industrial production and people's lives. It can also be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. At present, most boilers on the market heat the water tank through the combustion chamber. The water temperature distribution is not uniform during heating. The smoke and dust after boiler combustion are mostly discharged directly through the chimney, causing air pollution.
[0003] To address the aforementioned issues, a prior art patent (CNU) discloses an energy-saving and environmentally friendly boiler, comprising a boiler body, a chimney, and a fan. A flue is provided between the chimney and the boiler body, with both ends of the flue fixedly connected to the boiler body and the chimney, respectively. The fan is located between the boiler body and the chimney. The boiler body includes an outer shell, a combustion chamber, and heating steel pipes. The outer shell has a water inlet hole on its surface, which is fixedly connected to the heating steel pipes. The left side of the outer shell has a water outlet hole, which is fixedly connected to the heating steel pipes. The right side of the outer shell has a smoke outlet hole, which is fixedly connected to the flue. The heating steel pipes are located at the top of the combustion chamber. By providing evenly distributed heating steel pipes within the boiler, the water inside the heating pipes is fully heated, ensuring more uniform water flow. By providing spray heads with different nozzle diameters within the chimney, dust, particles, and other pollutants in the smoke are easily removed, preventing air pollution.
[0004] However, in the aforementioned existing technologies, the flue gas generated by combustion has a short residence time inside the boiler due to its structural design, which prevents the flue gas from being fully utilized. Utility Model Content
[0005] The purpose of this utility model is to provide an environmentally friendly and energy-saving boiler with flue gas recirculation, which solves the technical problem in the prior art where the flue gas generated by combustion has a short residence time in the boiler due to its structural design, resulting in the flue gas not being fully utilized.
[0006] To achieve the above objectives, this utility model employs an environmentally friendly and energy-saving boiler with flue gas recirculation, comprising a boiler body and an energy-saving mechanism. The energy-saving mechanism includes a combustion chamber, a circulation component, and a filter. The combustion chamber is detachably connected to the boiler body and located within the boiler body. The circulation component includes a fixed support, a heating steel pipe, a baffle plate, a flow-slowing grate, and a mixing chamber. The fixed support is fixedly connected to the boiler body and located above the combustion chamber. The heating steel pipe is fixedly connected to the boiler body and located outside the fixed support. The baffle plate is fixedly connected to the boiler body and located outside the heating steel pipe. The flow-slowing grate is fixedly connected to the baffle plate and located inside the baffle plate. The mixing chamber is fixedly connected to the boiler body and located outside the boiler body. The filter is fixedly connected to the boiler body and located above the boiler body.
[0007] The combustion chamber includes a handle and a collection frame. The handle is fixedly connected to the collection frame and is located outside the collection frame. The collection frame is detachably connected to the boiler body and is located inside the boiler body.
[0008] The combustion chamber further includes a limiting block, a combustion frame, and a barrier. The limiting block is fixedly connected to the boiler body and located above the collection frame. The combustion frame is slidably connected to the limiting block and located above the limiting block. The barrier is fixedly connected to the combustion frame and located inside the combustion frame.
[0009] The mixing chamber includes a flue gas pipe, a mixing cavity, and an air pipe. The flue gas pipe is fixedly connected to the boiler body and is located outside the boiler body. The mixing cavity is fixedly connected to the flue gas pipe and is located outside the flue gas pipe. The air pipe is fixedly connected to the mixing cavity and is located above the mixing cavity.
[0010] The mixing chamber further includes a motor, mixing blades, an extraction fan, and a circulation pipe. The motor is fixedly connected to the mixing blades and located outside the mixing chamber. The mixing blades are fixedly connected to the motor and located inside the mixing chamber. The extraction fan is fixedly connected to the mixing chamber and located on the side of the mixing chamber away from the flue gas pipe. The circulation pipe is fixedly connected to the output end of the extraction fan and located below the flue gas pipe.
[0011] This utility model discloses an environmentally friendly and energy-saving boiler with flue gas recirculation. In practical use, fuel is placed in the combustion chamber, and the heating steel pipe is fixed by the fixed seat. The heating steel pipe is connected to the water tank. The high-temperature flue gas generated in the combustion chamber rises in the boiler body and exchanges heat with the heating steel pipe, transferring heat to the water therein. Under the guidance of the baffle plate, the high-temperature flue gas flows tortuously in the boiler body, further releasing heat. The slow-flow drain slowly discharges the flue gas that has accumulated at the bend of the baffle plate upwards. The flue gas then circulates through the mixing chamber and is discharged from the filter. This method can effectively solve the problem of short residence time of flue gas in the boiler. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a structural schematic diagram of an environmentally friendly and energy-saving boiler with flue gas recirculation according to this utility model.
[0014] Figure 2 This is a front view of an environmentally friendly and energy-saving boiler with flue gas recirculation according to this utility model.
[0015] Figure 3 This is a side view of an environmentally friendly and energy-saving boiler with flue gas recirculation according to this utility model.
[0016] Figure 4 This is a partial structural schematic diagram of the mixing chamber of this utility model.
[0017] 101-Boiler body, 102-Filter, 103-Handle, 104-Collection frame, 105-Restriction block, 106-Combustion frame, 107-Barrier, 108-Fixed seat, 109-Heating steel pipe, 110-Break plate, 111-Slow flow duct, 112-Flue gas pipe, 113-Mixing chamber, 114-Air pipe, 115-Motor, 116-Mixing blades, 117-Exhaust fan, 118-Circulation pipe. Detailed Implementation
[0018] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.
[0019] Please see Figures 1-4 ,in Figure 1 This is a structural schematic diagram of an environmentally friendly and energy-saving boiler with flue gas recirculation according to this utility model. Figure 2 This is a front view of an environmentally friendly and energy-saving boiler with flue gas recirculation according to this utility model. Figure 3 This is a side view of an environmentally friendly and energy-saving boiler with flue gas recirculation according to this utility model. Figure 4 This is a partial structural schematic diagram of the mixing chamber of this utility model.
[0020] This utility model provides an environmentally friendly and energy-saving boiler with flue gas recirculation, including a boiler body 101 and an energy-saving mechanism. The energy-saving mechanism includes a combustion chamber, a circulation component, and a filter 102. The circulation component includes a fixed support 108, a heating steel pipe 109, a baffle 110, a slow-flow baffle 111, and a mixing chamber. The combustion chamber includes a handle 103, a collection frame 104, a limiting block 105, a combustion frame 106, and a barrier 107. The mixing chamber includes a flue gas pipe 112, a mixing chamber 113, an air pipe 114, a motor 115, mixing blades 116, an extraction fan 117, and a circulation pipe 118. The aforementioned solution solves the problem that, in the boiler's structural design, the flue gas generated during combustion has a short residence time inside the boiler, resulting in insufficient utilization of the flue gas.
[0021] In this specific embodiment, the combustion chamber is detachably connected to the boiler body 101 and located within the boiler body 101. The circulation assembly includes a fixed support 108, a heating steel pipe 109, a baffle 110, a flow-slowing channel 111, and a mixing chamber. The fixed support 108 is fixedly connected to the boiler body 101 and located above the combustion chamber. The heating steel pipe 109 is fixedly connected to the boiler body 101 and located outside the fixed support 108. The baffle 110 is fixedly connected to the boiler body 101 and located outside the heating steel pipe 109. The flow-slowing channel 111 is fixedly connected to the baffle 110 and located within the baffle 110. The mixing chamber is fixedly connected to the boiler body 101 and located outside the boiler body 101. The filter 102 is fixedly connected to the boiler body 101 and located above the boiler body 101. Fuel is placed in the combustion chamber, and the boiler fuel is... Solid fuels, such as coal or straw, are used. The fixed seat 108 fixes the heating steel pipe 109, which is connected to a water tank. The high-temperature flue gas generated in the combustion chamber rises in the boiler body 101 and exchanges heat with the heating steel pipe 109, transferring heat to the water therein. Guided by the baffle plate 110, the high-temperature flue gas flows in a tortuous manner in the boiler body 101, further releasing heat. The slow-flow drain 111 slowly discharges the flue gas that has accumulated at the bend of the baffle plate 110 upwards. The flue gas then circulates through the mixing chamber and is discharged from the filter 102. The filter 102 consists of a bag filter, a denitrification device, and a desulfurization device. The bag filter can efficiently filter dust particles in the flue gas, the denitrification device is used to remove ammonia oxides in the flue gas, and the desulfurization device can remove sulfur dioxide in the flue gas. After multiple purification treatments, the emitted flue gas meets environmental protection standards. This method can effectively solve the problem of short residence time of flue gas in the boiler.
[0022] The combustion chamber includes a handle 103 and a collection frame 104. The handle 103 is fixedly connected to the collection frame 104 and is located outside the collection frame 104. The collection frame 104 is detachably connected to the boiler body 101 and is located inside the boiler body 101. The handle 103 facilitates pulling the collection frame 104 out of the boiler body 101.
[0023] Secondly, the combustion chamber also includes a limiting block 105, a combustion frame 106, and a barrier 107. The limiting block 105 is fixedly connected to the boiler body 101 and is located above the collection frame 104. The combustion frame 106 is slidably connected to the limiting block 105 and is located above the limiting block 105. The barrier 107 is fixedly connected to the combustion frame 106 and is located inside the combustion frame 106. Fuel is placed inside the combustion frame 106, and the combustion frame 106 slides into the boiler body 101 through the limiting block 105. The waste material after combustion falls into the collection frame 104 through the gap of the barrier 107, thereby facilitating the collection of the waste material after combustion.
[0024] Meanwhile, the mixing chamber includes a flue gas pipe 112, a mixing cavity 113, and an air pipe 114. The flue gas pipe 112 is fixedly connected to the boiler body 101 and is located outside the boiler body 101. The mixing cavity 113 is fixedly connected to the flue gas pipe 112 and is located outside the flue gas pipe 112. The air pipe 114 is fixedly connected to the mixing cavity 113 and is located above the mixing cavity 113. A portion of the low-temperature flue gas that rises above the baffle 110 enters the mixing cavity 113 through the flue gas pipe 112, and air enters the mixing cavity 113 through the air pipe 114.
[0025] In addition, the mixing chamber also includes a motor 115, mixing blades 116, an extraction fan 117, and a circulation pipe 118. The motor 115 is fixedly connected to the mixing blades 116 and is located outside the mixing chamber 113. The mixing blades 116 are fixedly connected to the motor 115 and are located inside the mixing chamber 113. The extraction fan 117 is fixedly connected to the mixing chamber 113 and is located on the side of the mixing chamber 113 away from the flue gas pipe 112. The circulation pipe 118 is fixedly connected to the output end of the extraction fan 117 and is located below the flue gas pipe 112. When the extraction fan 117 operates, a portion of the low-temperature flue gas above the baffle 110... The flue gas enters the mixing chamber 113 and is drawn into the mixing chamber 113 through the air pipe 114. The motor 115 drives the mixing blades 116 to rotate, so that the low-temperature flue gas mixes with the outside air. The mixed low-temperature flue gas is discharged into the circulation pipe 118 through the extraction fan 117. The circulation pipe 118 discharges the mixed flue gas back into the combustion frame 106, so that the mixed low-temperature flue gas is put into the combustion process again. This reduces the combustion temperature in the combustion zone, inhibits the generation of nitrogen oxides, and reduces the emission of harmful gases. At the same time, the recirculated flue gas can carry some heat to participate in the combustion process, making the fuel combustion more complete and improving energy utilization efficiency.
[0026] Using an environmentally friendly and energy-saving boiler with flue gas recirculation according to this embodiment, by setting up the combustion chamber, the circulation component, and the filter 102, in specific use, fuel is placed in the combustion frame 106, and the combustion frame 106 slides into the boiler body 101 through the limiting block 105. The high-temperature flue gas generated by the fuel rises in the boiler body 101 and exchanges heat with the heating steel pipe 109, transferring heat to the water therein. Under the guidance of the baffle 110, the high-temperature flue gas flows in a tortuous manner in the boiler body 101, further releasing heat and slowing down the flow time of the flue gas. The slow-flow drain 111 slowly discharges the flue gas that has accumulated at the bend of the baffle 110 upwards. The extraction fan 117 operates, causing the baffle 110 to... A portion of the low-temperature flue gas enters the mixing chamber 113, and external air is drawn into the mixing chamber 113 through the air pipe 114. The motor 115 drives the mixing blades 116 to rotate, causing the low-temperature flue gas to mix with the external air. The mixed low-temperature flue gas is discharged into the circulation pipe 118 through the extraction fan 117. The circulation pipe 118 discharges the mixed flue gas back into the combustion frame 106, so that the mixed low-temperature flue gas is in the combustion process again. The low-temperature flue gas that has completed combustion is filtered through the filter 102 and then discharged. This effectively allows the flue gas to be fully utilized in the boiler. Furthermore, the mixing chamber allows the circulating flue gas to carry some heat to participate in the combustion process, making the fuel combustion more complete and improving energy efficiency.
[0027] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the utility model.
Claims
1. An environmentally friendly and energy-saving boiler with flue gas recirculation, comprising a boiler body, characterized in that, It also includes energy-saving organizations; The energy-saving mechanism includes a combustion chamber, a circulation assembly, and a filter. The combustion chamber is detachably connected to the boiler body and is located within the boiler body. The circulation assembly includes a fixed support, a heating steel pipe, a baffle plate, a flow-slowing grate, and a mixing chamber. The fixed support is fixedly connected to the boiler body and is located above the combustion chamber. The heating steel pipe is fixedly connected to the boiler body and is located outside the fixed support. The baffle plate is fixedly connected to the boiler body and is located outside the heating steel pipe. The flow-slowing grate is fixedly connected to the baffle plate and is located inside the baffle plate. The mixing chamber is fixedly connected to the boiler body and is located outside the boiler body. The filter is fixedly connected to the boiler body and is located above the boiler body.
2. The environmentally friendly and energy-saving boiler with flue gas recirculation as described in claim 1, characterized in that, The combustion chamber includes a handle and a collection frame. The handle is fixedly connected to the collection frame and is located outside the collection frame. The collection frame is detachably connected to the boiler body and is located inside the boiler body.
3. The environmentally friendly and energy-saving boiler with flue gas recirculation as described in claim 2, characterized in that, The combustion chamber further includes a limiting block, a combustion frame, and a barrier. The limiting block is fixedly connected to the boiler body and located above the collection frame. The combustion frame is slidably connected to the limiting block and located above the limiting block. The barrier is fixedly connected to the combustion frame and located inside the combustion frame.
4. The environmentally friendly and energy-saving boiler with flue gas recirculation as described in claim 3, characterized in that, The mixing chamber includes a flue gas pipe, a mixing cavity, and an air pipe. The flue gas pipe is fixedly connected to the boiler body and is located outside the boiler body. The mixing cavity is fixedly connected to the flue gas pipe and is located outside the flue gas pipe. The air pipe is fixedly connected to the mixing cavity and is located above the mixing cavity.
5. The environmentally friendly and energy-saving boiler with flue gas recirculation as described in claim 4, characterized in that, The mixing chamber also includes a motor, mixing blades, an extraction fan, and a circulation pipe. The motor is fixedly connected to the mixing blades and is located outside the mixing chamber. The mixing blades are fixedly connected to the motor and are located inside the mixing chamber. The extraction fan is fixedly connected to the mixing chamber and is located on the side of the mixing chamber away from the flue gas pipe. The circulation pipe is fixedly connected to the output end of the extraction fan and is located below the flue gas pipe.