Gas-fired boiler high-temperature flue gas desulfurization reactor
By introducing a novel desulfurization reactor with a double-swirl guide plate and self-cleaning function into a gas-fired boiler, the problems of low flue gas desulfurization efficiency and flue ash accumulation have been solved, achieving efficient desulfurization and cleaning.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-04-10
AI Technical Summary
Existing high-temperature flue gas desulfurization reactors for gas-fired boilers have low efficiency, and dust and reactants in the high-temperature flue gas tend to accumulate in the flue.
Design a novel desulfurization reactor comprising a horizontal flue, desulfurizing agent spray gun, double swirl guide plate, climbing flue, nozzle, and sewage discharge pipe. The double swirl guide plate improves the contact efficiency between flue gas and desulfurizing agent, and is equipped with a self-cleaning function to prevent ash accumulation in the flue.
It improves the reaction efficiency between flue gas and desulfurizing agent, saves space in flue layout, and avoids the accumulation of dust and reactants in flue through regular cleaning.
Smart Images
Figure CN224100388U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of high-temperature flue gas desulfurization reactors of gas boiler, belong to metallurgical industry high-temperature flue gas desulfurization equipment technical field of gas boiler. BACKGROUND
[0002] Gas boiler generates high-temperature flue gas in combustion process, is influenced by gas quality, these flue gas contains a large amount of dust, sulfide and nitrogen oxide. These flue gas containing harmful substances if directly discharged into atmosphere, produces irreversible pollution to environment.
[0003] Most gas boilers adopt dry desulfurization process, high-efficiency desulfurizer with particle size of 20~25 μm is uniformly sprayed in flue gas pipeline, main component of high-efficiency desulfurizer is NaHCO3, and it reacts with hot flue gas, by-product after reaction enters cloth bag, is collected by dust collector and is centrally treated after processing. Flue gas after processing is directly discharged through chimney. Dry desulfurization efficiency requires higher equipment, and it must ensure that flue gas and desulfurizer have sufficient contact area, reaction temperature and reaction time.
[0004] Conventional desulfurization reactor has low reaction efficiency of high-temperature flue gas and desulfurizer, and dust in high-temperature flue gas and reactant are prone to accumulate in flue.
[0005] The desulfurization reaction device is designed for dry desulfurization process, and has self-cleaning function, which can improve the reaction efficiency of flue gas and desulfurizer in limited flue length, save installation space, has higher desulfurization efficiency, and can be cleaned regularly to avoid dust and reactant accumulation in flue. INVENTION CONTENTS
[0006] The utility model discloses a kind of high-temperature flue gas desulfurization reactors of gas boiler, can improve the reaction efficiency of high-temperature flue gas and desulfurizer, simultaneously can be cleaned regularly, avoid dust and reactant accumulation in flue, solve the problems in background art.
[0007] The technical scheme of the utility model is:
[0008] A kind of high-temperature flue gas desulfurization reactor of gas boiler, including horizontal flue, desulfurizer main lance, desulfurizer spare lance, double spiral guide vane, climbing flue, spray head, spray pipe and blowdown pipeline, horizontal flue is connected with climbing flue, horizontal flue is connected with desulfurizer main lance, desulfurizer spare lance and blowdown pipeline respectively, spray head connected with spray pipe is arranged in climbing flue, double spiral guide vane is arranged in horizontal flue close to climbing flue.
[0009] The double-rotation guide plate comprises a central pipe, an inner guide vane, an inner annular plate, an outer guide vane and an outer annular plate, the inner guide vane and the outer guide vane are both fan-shaped guide vanes, the inner guide vane is welded between the central pipe and the inner annular plate, the outer guide vane is welded between the inner annular plate and the outer annular plate, and the diameter of the outer annular plate matches the diameter of the horizontal flue.
[0010] The rotation directions of the inner guide vane and the outer guide vane are opposite.
[0011] The inner guide vane is left-handed, and there are eight pieces in total; and the outer guide vane is right-handed, and there are fourteen pieces in total.
[0012] The climbing flue is provided with a spray head connected with the spray pipe, and the water spraying direction of the spray head is towards the horizontal flue.
[0013] The included angle between the climbing flue and the horizontal flue is 30°.
[0014] The pollution discharge pipeline is provided with a pollution discharge valve, and the spray pipe is provided with a ball valve.
[0015] The beneficial effect of the utility model is that the arrangement space of the flue can be saved, the reaction efficiency of flue gas and desulfurizing agent is improved, and periodic cleaning can be performed to avoid dust and reactants from accumulating in the flue. BRIEF DESCRIPTION OF DRAWINGS
[0016] Fig. 1 It is a structural schematic view of the utility model;
[0017] Fig. 2 It is a structural schematic view of the double-rotation guide plate of the utility model;
[0018] In the figure: horizontal flue 1, desulfurizing agent main spray gun 2, desulfurizing agent standby spray gun 3, double-rotation guide plate 4, climbing flue 5, spray head 6, spray pipe 7, ball valve 8, pollution discharge pipeline 9, pollution discharge valve 10, central pipe 11, inner guide vane 12, inner annular plate 13, outer guide vane 14, outer annular plate 15. DETAILED DESCRIPTION
[0019] The utility model will be further described through examples in combination with the drawings.
[0020] Refer to the drawings Figs. 1-2 A high-temperature flue gas desulfurization reactor of a gas-fired boiler comprises a horizontal flue 1, a desulfurizing agent main spray gun 2, a desulfurizing agent standby spray gun 3, a double-rotation guide plate 4, a climbing flue 5, a spray head 6, a spray pipe 7 and a pollution discharge pipeline 9, the horizontal flue 1 is connected with the climbing flue 5, the horizontal flue 1 is respectively connected with the desulfurizing agent main spray gun 2, the desulfurizing agent standby spray gun 3 and the pollution discharge pipeline 9, the climbing flue 5 is provided with the spray head 6 connected with the spray pipe 7, and the double-rotation guide plate 4 is arranged in the horizontal flue 1 close to the climbing flue 5.
[0021] In the embodiment, refer to the drawingsFigs. 1-2 The reactor comprises a horizontal flue 1, a main desulfurizing agent spray gun 2, a backup desulfurizing agent spray gun 3, a double-swirl guide plate 4, a climbing flue 5, spray nozzles 6, spray pipes 7, ball valves 8, a sewage discharge pipe 9, and a sewage discharge valve 10, wherein:
[0022] The horizontal flue 1 is a circular carbon steel pipe. The flue gas, after absorbing heat from the gas heater, enters the horizontal flue 1. An expansion joint is installed at the connection between the horizontal flue 1 and the gas heater to counteract the additional stress caused by changes in pipe temperature.
[0023] The main desulfurizing agent spray gun 2 and the standby desulfurizing agent spray gun 3 are arranged in an "A" shape, one for standby and one for use. They are installed vertically above the horizontal flue 1. Since the desulfurization reaction requires a high reaction temperature, the desulfurizing agent generates heat during the grinding process. In order to maximize the use of this heat and improve the reaction efficiency, the desulfurizing agent spray gun and the outside of the pipeline are insulated.
[0024] As attached Fig. 2 As shown, the double-swirl guide plate 4 includes a central tube 11, inner guide vanes 12, inner annular plate 13, outer guide vanes 14, and outer annular plate 15. The central tube 11 is hollow, which ensures both the strength of the double-swirl guide plate and improves the fluid flow. To ensure welding strength and corrosion resistance, the materials of the inner guide vanes 12, inner annular plate 13, outer guide vanes 14, and outer annular plate 15 are the same as those of the horizontal flue 1. The inner guide vanes 12 consist of 8 left-handed fan-shaped guide vanes welded between the central tube 11 and the inner annular plate 13. The outer guide vanes 14 consist of 16 right-handed fan-shaped guide vanes welded between the inner annular plate 13 and the outer annular plate 15. The diameter of the outer annular plate 15 matches the diameter of the horizontal flue 1.
[0025] As attached Fig. 1 As shown, the ascending flue 5 is a 30° ascending flue, which connects to the dust collector inlet after the double vortex guide plate 4. This is the main reaction area between the desulfurizing agent and the hot flue gas, and its length is about 15 meters.
[0026] The spray direction of nozzle 6 is towards one side of the horizontal flue 1. Its water source is taken from the auxiliary machine cooling water, with a pressure of approximately 0.2 MPa. To increase the flushing pressure, a booster device is installed on the pipeline, and the switch of the flushing water is controlled by ball valve 8 on the pipeline. Nozzles 6 are installed on both sides of the climbing flue 5, close to the top of the climbing flue 5.
[0027] The sewage pipe 9 is installed at the lowest point of the horizontal flue 1 to facilitate the drainage of sewage after flushing. The outlet is discharged to the factory's sewage system, and after recycling and treatment, it can be reused as greywater.
[0028] The blowdown valve 10 is a manual gate valve, and is connected with the blowdown pipeline 9 in a flange connection mode, is in a normally closed state during normal operation, is opened during flushing, and can also be used as an inspection hole to periodically check the flue ash condition.
[0029] During normal operation of the boiler, the blowdown valve 10 and the ball valve 8 are in a closed state, the main desulfurizer lance 1 is put into use, the hot flue gas generated by the boiler combustion is mixed with the desulfurizer sprayed by the lance, is disturbed by the double-rotation guide plate 4, the SO2 in the flue gas is fully reacted with the desulfurizer in the climbing flue 5, solid by-products are generated, are collected at the dust collector, and the flue gas after desulfurization is discharged through the chimney.
[0030] When the main desulfurization equipment is blocked or fails, the standby desulfurizer lance 3 can be switched to, and since the desulfurizer is a small solid particle, no valve is arranged in the middle to avoid blocking the pipeline and the lance.
[0031] When the boiler is shut down, the desulfurization system is exited at this time, the blowdown valve 10 and the ball valve 8 are opened, the flushing water after being pressurized is used to flush the device, the sewage after being flushed is discharged through the blowdown pipeline 9 to the plant sewage system, the sewage discharged through the blowdown pipeline can be used to judge the cleaning condition, the sewage discharged in the initial cleaning stage should be dark red, with the progress of the flushing process, the discharged water is gradually clear, when the clean water is discharged, the cleaning is considered to be completed, the ball valve 8 is closed, and the blowdown valve 10 is closed before the boiler is started.
[0032] Compared with the conventional desulfurization reactor, the utility model improves the efficiency of the dry desulfurization, saves the arrangement space of the flue, can also realize self-cleaning, and reduces the difficulty of flue ash cleaning.
Claims
1. A gas boiler high temperature flue gas desulphurization reactor characterized by: The utility model relates to a desulfurization device, which comprises a horizontal flue (1), a main desulfurization gun (2), a standby desulfurization gun (3), a double-rotation guide plate (4), a climbing flue (5), a spray head (6), a spray pipe (7) and a blowdown pipeline (9).
2. A gas boiler high temperature flue gas desulphurization reactor according to claim 1, characterized in that: The double-rotation guide plate (4) comprises a central pipe (11), an inner guide fin (12), an inner annular plate (13), an outer guide fin (14) and an outer annular plate (15), the inner guide fin (12) and the outer guide fin (14) are both fan-shaped guide fins, the inner guide fin (12) is welded between the central pipe (11) and the inner annular plate (13), the outer guide fin (14) is welded between the inner annular plate (13) and the outer annular plate (15), and the diameter of the outer annular plate (15) matches the diameter of the horizontal flue (1).
3. A gas boiler high temperature flue gas desulphurization reactor according to claim 2, characterized in that: The inner guide fin (12) and the outer guide fin (14) are opposite in rotation direction.
4. A gas boiler high temperature flue gas desulphurization reactor according to claim 3, characterized in that: The inner guide fin (12) is left-handed, and there are eight pieces in total; the outer guide fin (14) is right-handed, and there are fourteen pieces in total.
5. A gas boiler high temperature flue gas desulphurization reactor according to claim 1, characterized in that: The climbing flue (5) is provided with the spray head (6) connected with the spray pipe (7), and the water spraying direction of the spray head (6) faces the horizontal flue (1).
6. A gas boiler high temperature flue gas desulphurization reactor according to claim 1, characterized in that: The included angle between the climbing flue (5) and the horizontal flue (1) is 30°.
7. A gas boiler high temperature flue gas desulphurization reactor according to claim 1, characterized in that: The blowdown pipeline (9) is provided with a blowdown valve (10), and the spray pipe (7) is provided with a ball valve (8).