Boiler system with flue gas diversion function
By introducing flow guiding and waste heat recovery modules into the boiler system, the flow path of flue gas is optimized, solving the problems of insufficient waste heat recovery and uneven flow, and achieving efficient waste heat recovery and environmentally friendly emissions.
Patent Information
- Application Number
- CN202422826020.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-20
AI Technical Summary
Insufficient waste heat recovery during flue gas discharge from the boiler system, coupled with uneven flue gas circulation, leads to energy waste and problems such as poor circulation or blockage.
The boiler system with flue gas guidance is adopted, including superheated flue, waste heat recovery flue, guide box and guide assembly. The flue gas flow path is optimized by guide plate and fixed plate. Waste heat is recovered by combining high temperature and low temperature economizer and air preheater. Denitrification and desulfurization treatment modules are set up to ensure uniform flue gas flow and efficient recovery.
It improves waste heat recovery efficiency, reduces energy consumption, avoids heat loss caused by flue gas contacting the pipe wall, ensures smooth flue gas flow, reduces heat transfer efficiency loss and operating pressure loss, and achieves efficient flue gas treatment and environmentally friendly emissions.
Smart Images
Figure CN223512133U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler system technology, and in particular to a boiler system with flue gas guiding function. 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 needed for industrial production and daily life, or it can be converted into mechanical energy through a steam power unit, or further converted into electrical energy through a generator. Boilers that provide hot water are called hot water boilers, mainly used for domestic purposes, with some applications in industrial production.
[0003] In boiler systems, flue gas has a certain temperature when it is discharged. In order to avoid the waste of waste heat, economizers and air preheaters are usually used to recover and utilize it, thereby saving energy.
[0004] However, when the flue gas flows through the pipe, it exchanges heat with the pipe wall, which means that the waste heat of the flue gas in the boiler system cannot be well recovered. In addition, when the flue gas changes direction, the gas flow direction is unidirectional, resulting in uneven internal airflow. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a boiler system with flue gas guiding function.
[0006] The technical solution of this utility model is: a boiler system with flue gas guiding, including a furnace body, on which a superheated flue for steam heating is provided, and a superheating component is provided inside the superheated flue; a waste heat recovery flue connected to the superheated flue, and a first waste heat recovery module and a second waste heat recovery module are provided inside the waste heat recovery flue; a flue gas guiding module is provided between the first waste heat recovery module and the second waste heat recovery module, and the flue gas guiding module includes: a first guiding box disposed on one side of the waste heat recovery flue, which... The first guide box is connected to the waste heat recovery flue; a baffle plate is provided inside the waste heat recovery flue to guide the flue gas into the first guide box; a second guide box is provided on the other side of the waste heat recovery flue, the second guide box is connected to the first guide box via a connecting pipe, the second guide box is connected to the waste heat recovery flue; a guide assembly is provided in the second guide box for connecting to the waste heat recovery flue; a flue gas treatment module is connected to the waste heat recovery flue; and an air intake module is used for furnace air intake.
[0007] Furthermore, the flow guiding assembly includes: a fixing frame fixed inside the second flow guiding box; and three sets of flow guiding plates arranged sequentially from top to bottom on the fixing frame, with the three sets of flow guiding plates being inclined at different angles.
[0008] Furthermore, the interior of the first and second diversion boxes is provided with a fixing plate for increasing the flue gas flow path, and the fixing plate is provided with several denitrification processors.
[0009] Furthermore, the first waste heat recovery module includes: a high-temperature economizer disposed inside the waste heat recovery flue; and a high-temperature air preheater located near the high-temperature economizer.
[0010] Furthermore, the second waste heat recovery module includes: a low-temperature economizer disposed inside the waste heat recovery flue; a low-temperature air preheater near the low-temperature economizer; and a horizontal air preheater disposed inside the other end of the waste heat recovery flue.
[0011] Furthermore, the superheating assembly includes: three sets of superheaters sequentially disposed inside the superheated flue; and a water pipe disposed outside the furnace body and connected to the superheaters, the water pipe being connected to the first waste heat recovery module and the second waste heat recovery module respectively.
[0012] Furthermore, the flue gas treatment module includes: a dust collector located at the other end of the waste heat recovery flue; an exhaust fan connected to the dust collector via a pipe; a desulfurization tower connected to the exhaust fan via a pipe; and a chimney for flue gas emission and connected to the desulfurization tower via a pipe.
[0013] Furthermore, the air intake module includes an air intake fan connected to an air supply pipe, the other end of which is connected to a second waste heat recovery module. The second waste heat recovery module and the first waste heat recovery module are interconnected through a pipeline.
[0014] The beneficial technical effects of this utility model are as follows: the first and second waste heat recovery modules can fill the space inside the waste heat recovery flue, allowing the flue gas to directly recover waste heat during the flow process, avoiding excessive contact with the pipe wall and thus preventing heat dissipation, thereby improving the waste heat recovery effect and further reducing energy consumption. After passing through the first waste heat recovery module, the flue gas can enter the first guide box, and after passing through the first guide box, it enters the second guide box through the connecting pipe. It then returns to the waste heat recovery flue through the guide components in the second guide box. The guide components can prevent the possible problems of poor flue gas flow or blockage under harsh working conditions, which would reduce heat transfer efficiency and increase operating pressure loss. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a rear view schematic diagram of the structure of the flue gas guiding module of this utility model;
[0017] Figure 3This is a front view schematic diagram of the flow guiding component of this utility model;
[0018] Figure 4 This is a utility model Figure 1 A magnified schematic diagram of the structure at point A in the middle.
[0019] The numbers and letters in the diagram represent the names of the corresponding components:
[0020] 1. Furnace body; 2. Superheated flue; 21. Superheated components; 22. Water pipe; 3. Waste heat recovery flue; 4. First guide box; 41. Baffle plate; 42. Second guide box; 43. Connecting pipe; 44. Fixing plate; 45. Denitrification processor; 5. Fixing frame; 51. Guide plate; 6. High-temperature economizer; 61. High-temperature air preheater; 62. Low-temperature economizer; 63. Low-temperature air preheater; 64. Horizontal air preheater; 7. Dust collector; 71. Exhaust fan; 72. Desulfurization tower; 73. Chimney; 8. Inlet fan; 81. Gas transmission pipe. Detailed Implementation
[0021] In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.
[0022] See appendix Figure 1-4 As shown, the boiler system with flue gas guiding in Embodiment 1 includes a boiler body 1, which is provided with a superheated flue 2 for steam heating, and a superheated component 21 is provided in the superheated flue 2.
[0023] The superheating component 21 is a key component in a steam power unit. Its main function is to heat the saturated steam generated by the boiler, thereby increasing its temperature and turning it into superheated steam. Superheated steam has a higher temperature and energy than saturated steam, and therefore has significant advantages in terms of thermal efficiency, work capacity, and reducing the moisture content in the steam.
[0024] The waste heat recovery flue 3 is connected to the superheated flue 2, and the waste heat recovery flue 3 is equipped with a first waste heat recovery module and a second waste heat recovery module.
[0025] The first and second waste heat recovery modules can fill the space inside the waste heat recovery flue 3, allowing the flue gas to directly recover waste heat during the circulation process. This avoids excessive contact with the pipe wall, which would cause heat dissipation, thereby improving the waste heat recovery effect and further reducing energy consumption.
[0026] A flue gas guiding module is provided between the first waste heat recovery module and the second waste heat recovery module. The flue gas guiding module includes: a first guiding box 4 located on one side of the waste heat recovery flue 3, which is connected to the waste heat recovery flue 3; a partition 41 located inside the waste heat recovery flue 3 to guide the flue gas into the first guiding box 4; a second guiding box 42 located on the other side of the waste heat recovery flue 3, which is connected to a connecting pipe 43 that is connected to the first guiding box 4 and is connected to the waste heat recovery flue 3; a guiding component located in the second guiding box 42 for connecting to the waste heat recovery flue 3; a flue gas treatment module connected to the waste heat recovery flue 3; and an air intake module for air intake of the furnace body 1.
[0027] After passing through the first waste heat recovery module, the flue gas can enter the first guide box 4. After passing through the first guide box 4, it enters the second guide box 42 through the connecting pipe 43. Then, it returns to the waste heat recovery flue 3 through the guide component in the second guide box 42. The guide component can prevent the flue gas from being obstructed or blocked under harsh operating conditions, which would reduce heat transfer efficiency and increase operating pressure loss.
[0028] The flow guiding component can also be installed at the superheated pipe so that the flue gas can flow evenly into the waste heat recovery flue 3.
[0029] Furthermore, the flow guiding assembly includes: a fixing frame 5 fixed inside the second flow guiding box 42; and three sets of flow guiding plates 51 arranged sequentially from top to bottom on the fixing frame 5, with the three sets of flow guiding plates 51 arranged at different angles.
[0030] The flue gas can be evenly distributed by three sets of guide plates 51 with different angles, so that the flue gas flows evenly into the waste heat recovery flue 3 and then into the second waste heat recovery module.
[0031] Furthermore, the interior of the first flow guide box 4 and the second flow guide box 42 is provided with a fixing plate 44 for increasing the flue gas flow path, and the fixing plate 44 is provided with a number of denitrification processors 45.
[0032] The fixed plate 44 can increase the flow path of the flue gas, allowing the flue gas to be better denitrified.
[0033] Furthermore, the first waste heat recovery module includes: a high-temperature economizer 6 located inside the waste heat recovery flue 3; and a high-temperature air preheater 61 located near the high-temperature economizer 6.
[0034] The high-temperature economizer 6 and the high-temperature air preheater 61 can be used to recover the waste heat of the flue gas. The high-temperature economizer 6 can transfer heat through heat exchange, thereby recovering and utilizing it. The high-temperature air preheater 61 can recover the waste heat of the air entering the furnace body 1, thereby improving the efficiency of the furnace body 1.
[0035] Furthermore, the second waste heat recovery module includes: a low-temperature economizer 62 located inside the waste heat recovery flue 3; a low-temperature air preheater 63 located near the low-temperature economizer 62; and a horizontal air preheater 64 located inside the other end of the waste heat recovery flue 3.
[0036] Waste heat recovery from flue gas can be achieved using the low-temperature economizer 62 and the low-temperature air preheater 63. The low-temperature economizer 62 can transfer heat through heat exchange for recycling. The low-temperature air preheater 63 can recover waste heat from the air entering the furnace body 1, thereby improving the efficiency of the furnace body 1. The horizontal air preheater 64 can further recover waste heat, completely recovering the waste heat from the flue gas and avoiding heat waste.
[0037] Furthermore, the superheating assembly 21 includes: three sets of superheaters arranged sequentially inside the superheated flue 2; and a water pipe 22 located outside the furnace body 1 and connected to the superheaters, the water pipe 22 being connected to the first waste heat recovery module and the second waste heat recovery module respectively.
[0038] The three sets of superheaters arranged in sequence can be a screen-type superheater, a high-temperature superheater, and a low-temperature superheater, which increases the processing efficiency of superheated steam. The water pipe 22 can be connected to the high-temperature economizer 6 and the low-temperature economizer 62 to recover waste heat.
[0039] Furthermore, the flue gas treatment module includes: a dust collector 7 located at the other end of the waste heat recovery flue 3; an exhaust fan 71 connected to the dust collector 7 via a pipe; a desulfurization tower 72 connected to the exhaust fan 71 via a pipe; and a chimney 73 for flue gas emission and connected to the desulfurization tower 72 via a pipe.
[0040] The dust collector 7 can remove dust from the flue gas after waste heat recovery, then desulfurize it through the desulfurization tower 72, and finally discharge it through the chimney 73, so that the flue gas emission meets the standards and will not pollute the air.
[0041] Furthermore, the air intake module includes an air intake fan 8, which is connected to an air supply pipe 81. The other end of the air supply pipe 81 is connected to a second waste heat recovery module, and the second waste heat recovery module and the first waste heat recovery module are interconnected through a pipeline.
[0042] The intake fan 8 can draw in outside air and then deliver it to the second waste heat recovery module through the air supply pipe 81 for heat exchange. After passing through the second waste heat recovery module, it enters the first waste heat recovery module and finally enters the furnace body 1 to achieve the function of waste heat circulation.
[0043] The high-temperature economizer 6 and the low-temperature economizer 62 adopt bare tube economizers. The finned economizers currently in use are complex to manufacture and have high costs. In addition, the fins increase the heat transfer area, but they also easily cause dust and dirt to accumulate in the flue gas, especially in coal-fired boilers. This will affect the heat transfer effect and increase the difficulty of maintenance and cleaning frequency. The bare tube economizer can solve the above problems. Furthermore, air holes can be set on the bare tube economizer to blow out the dust and solve the problem of dust accumulation.
[0044] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A boiler system with flue gas guiding function, characterized in that, include: A furnace body (1) is provided with a superheated flue (2) for steam heating, and a superheated component (21) is provided in the superheated flue (2); A waste heat recovery flue (3) is connected to the superheated flue (2). The waste heat recovery flue (3) is provided with a first waste heat recovery module and a second waste heat recovery module inside. A flue gas guiding module is provided between the first waste heat recovery module and the second waste heat recovery module. The flue gas guiding module includes: a first guiding box (4) located on one side of the waste heat recovery flue (3) and connected to the waste heat recovery flue (3); a partition (41) located inside the waste heat recovery flue (3) to guide the flue gas into the first guiding box (4); a second guiding box (42) located on the other side of the waste heat recovery flue (3) and connected to a connecting pipe (43) connected to the first guiding box (4). The second guiding box (42) is connected to the waste heat recovery flue (3); and a guiding component located in the second guiding box (42) for connecting the waste heat recovery flue (3). A flue gas treatment module connected to the waste heat recovery flue (3); And an air intake module for the furnace body (1) to take in air.
2. The boiler system with flue gas guiding according to claim 1, characterized in that, The flow guiding assembly includes: a fixed frame (5) fixed inside the second flow guiding box (42); and three sets of flow guiding plates (51) arranged on the fixed frame (5) from top to bottom, with the three sets of flow guiding plates (51) arranged at different angles.
3. The boiler system with flue gas guiding according to claim 1, characterized in that, The first guide box (4) and the second guide box (42) are provided with a fixing plate (44) for increasing the flue gas flow path, and the fixing plate (44) is provided with a number of denitrification processors (45).
4. The boiler system with flue gas guiding according to claim 1, characterized in that, The first waste heat recovery module includes: a high-temperature economizer (6) located inside the waste heat recovery flue (3); and a high-temperature air preheater (61) located near the high-temperature economizer (6).
5. The boiler system with flue gas guiding according to claim 1, characterized in that, The second waste heat recovery module includes: a low-temperature economizer (62) disposed inside the waste heat recovery flue (3); a low-temperature air preheater (63) near the low-temperature economizer (62); and a horizontal air preheater (64) disposed inside the other end of the waste heat recovery flue (3).
6. The boiler system with flue gas guiding according to claim 1, characterized in that, The superheating assembly (21) includes: three sets of superheaters arranged sequentially inside the superheated flue (2); and a water pipe (22) located outside the furnace body (1) and connected to the superheaters, the water pipe (22) being connected to the first waste heat recovery module and the second waste heat recovery module respectively.
7. The boiler system with flue gas guiding according to claim 1, characterized in that, The flue gas treatment module includes: a dust collector (7) located at the other end of the waste heat recovery flue (3); an exhaust fan (71) connected to the dust collector (7) via a pipe; a desulfurization tower (72) connected to the exhaust fan (71) via a pipe; and a chimney (73) for flue gas emission and connected to the desulfurization tower (72) via a pipe.
8. The boiler system with flue gas guiding according to claim 1, characterized in that, The air intake module includes an air intake fan (8), which is connected to an air supply pipe (81). The other end of the air supply pipe (81) is connected to a second waste heat recovery module. The second waste heat recovery module and the first waste heat recovery module are connected to each other through a pipeline.