High-temperature flue gas spraying treatment device

Abstract

The utility model relates to a high-temperature flue gas spraying treatment device, which belongs to the technical field of flue gas treatment and comprises a spraying tower and a cooling tower, a partition plate is arranged in the middle of the spraying tower and connected with a flow guide pipe, a gas distribution plate is fixed at the top of the flow guide pipe, and gas distribution holes are uniformly formed in the outer side of the bottom of the gas distribution plate. Liquid conveying ring pipes are fixed on the outer wall of the spraying tower above and below the segmentation disc and the outer side wall of the upper part of the cooling tower, a plurality of connecting pipes are arranged above and below the liquid conveying ring pipes in a circular array manner, spraying pipes are fixed at the other ends of the connecting pipes, and atomizing nozzles are fixed at the other ends of the spraying pipes. The gas inlet of the spray tower is connected with the cooling tower through the flue gas conveying pipe, the spray cooling structure is arranged in the cooling tower, flue gas before entering the spray tower can be cooled and dedusted, the influence of high temperature and dust on subsequent flue gas treatment is prevented, liquid sprayed out of the spray tower and the cooling tower is guided through the liquid conveying ring pipe and the connecting pipe, and the spraying effect is good. The liquid distribution is more uniform, and the spraying effect is better.

Description

TECHNICAL FIELD

[0001] The utility model relates to a high temperature flue gas spray treatment device belongs to flue gas treatment technical field. BACKGROUND

[0002] In numerous industrial production processes, such as metallurgy, chemical industry, electric power and other industries, a large amount of high temperature flue gas will be produced. These high temperature flue gas usually contains harmful substances such as dust, sulfur oxide and nitrogen oxide. If they are directly discharged into the atmosphere, they will seriously pollute the environment and endanger human health.

[0003] At present, spray treatment is a commonly used method for treating high temperature flue gas. The existing high temperature flue gas spray treatment device has some shortcomings. For example, in order to reduce the influence of the temperature of the treated flue gas and the high temperature of the flue gas on the spray treatment, a heat exchanger is used to cool the flue gas before spraying. However, since there is dust in the flue gas, it is easy to cause the heat exchanger to be blocked, and the dust affects the subsequent spray treatment. SUMMARY

[0004] The utility model provides a kind of high temperature flue gas spray treatment device, solve the problems in the above background technique.

[0005] The utility model relates to a kind of high temperature flue gas spray treatment device, including spray tower, the top and lower part of spray tower are equipped with gas outlet and gas inlet respectively, gas inlet is connected with cooling tower by smoke pipe, the lower part of cooling tower is equipped with flue gas inlet, the middle part of spray tower is equipped with the split disc of inverted funnel shape, split disc divides into desulfurization zone and denitration zone, the top outlet of split disc is connected with flow guide pipe, the top of flow guide pipe is fixed with gas distribution plate, the bottom outside of gas distribution plate is evenly equipped with gas distribution hole, the outer wall of spray tower above and below split disc and the upper outer wall of cooling tower are all fixed with liquid ring pipe, multiple connection pipes are arranged in circular array on the upper and lower of liquid ring pipe, the other end of connection pipe is fixed with spray pipe, the other end of spray pipe is fixed with atomizing nozzle, the upper part of cooling tower is equipped with demister one.

[0006] As a kind of preferred, the top of gas distribution plate is conical, prevent liquid or dust from accumulating on the top of gas distribution plate, the bottom of the inner cavity of gas distribution plate is conical and set as middle high and outside low, which can guide the condensate generated in the gas distribution plate out and prevent liquid accumulation.

[0007] As a kind of preferred, split disc is fixed with demister two below, which can prevent atomized desulfurizer from entering denitration zone.

[0008] As a kind of preferred, filler layer is arranged below atomizing nozzle in spray tower, which can strengthen gas-liquid contact, make flue gas and spray liquid distribute more evenly in tower, avoid local reaction insufficient, and enhance the stability of desulfurization and denitration reaction.

[0009] As a kind of preferred, fixedly connected with return pipe on the outer wall of spray tower below gas distribution disc, the lower end of return pipe is fixedly connected with denitration agent storage tank, denitration agent storage tank is equipped with liquid suction pipe one, liquid supplement pipe one and liquid discharge pipe one, the other end of liquid suction pipe one is connected with liquid delivery ring pipe in the upper part of spray tower, liquid pump one and filter one are equipped on liquid suction pipe one, can recycle and utilize denitration agent, save cost, and it is convenient to discharge waste liquid and supplement denitration agent.

[0010] As a kind of preferred, the lower part of spray tower is equipped with liquid suction pipe two, liquid supplement pipe two and liquid discharge pipe two, the other end of liquid suction pipe two is connected with liquid delivery ring pipe in the lower part of spray tower, liquid pump two and filter two are equipped on liquid suction pipe two. Can recycle and utilize desulfurizing agent, save cost, and it is convenient to discharge waste liquid and supplement desulfurizing agent.

[0011] As a kind of preferred, the bottom of cooling tower is equipped with blowdown pipe, the lower part of cooling tower is equipped with circulation pipe, the other end of circulation pipe is connected with liquid delivery ring pipe on cooling tower, filter three, water storage tank, liquid pump three and heat exchanger are equipped on circulation pipe, can recycle and utilize cooling water, save water.

[0012] The utility model discloses the following beneficial effects:

[0013] Cooling tower is connected with the cooling tower in the gas inlet of spray tower, is equipped with spray cooling structure in cooling tower, can carry out cooling and dust removal to the flue gas before entering spray tower, prevents high temperature and dust influence subsequent flue gas treatment, and liquid ejection in spray tower and cooling tower is guided through liquid delivery ring pipe and connecting pipe, and liquid distribution is more uniform, and spray effect is better, and the upper part of cooling tower is equipped with demister one, can remove water mist, prevent that the water vapor produced when spray cooling enters the desulfurization area in spray tower and dilutes desulfurizing agent, influence desulfurization effect, in addition, the gas from desulfurization area into denitration area, can be distributed through gas distribution disc, and gas distribution is more uniform, increases denitration effect, and gas distribution hole is arranged at the bottom outside of gas distribution disc, can prevent falling desulfurizing agent from entering while evenly distributing gas. ACCURACY

[0014] Figure 1 It is the front view structure schematic drawing of the utility model;

[0015] Figure 2 It is the front view structure schematic drawing of the utility model; Figure 1 Figure 1 ;

[0016] Figure 3 It is the front view structure schematic drawing of the utility model; Figure 1 Figure 2 ;

[0017] ​​In the diagram: 1. Liquid pump three; 2. Water storage tank; 3. Heat exchanger; 4. Circulation pipe; 5. Cooling tower; 6. Demister one; 7. Smoke conveying pipe; 8. Liquid pump two; 9. Spray tower; 10. Spray pipe; 11. Atomizing nozzle; 12. Connecting pipe; 13. Liquid conveying loop pipe; 14. Packing layer; 15. Liquid extraction pipe two; 16. Air distribution plate; 17. Guide pipe; 18. Dividing plate; 19. Return pipe; 20. Demister two; 21. Liquid pump one; 22. Denitrification agent storage tank; 23. Liquid extraction pipe two; 24. Air distribution hole. Detailed Implementation

[0018] The present invention will be further described below with reference to the embodiments.

[0019] Example 1, as Figures 1 to 3 As shown, this utility model is a high-temperature flue gas scrubbing treatment device, including a scrubbing tower 9. The top and bottom of the scrubbing tower 9 are respectively provided with an air outlet and an air inlet. The air inlet is connected to a cooling tower 5 through a flue gas conveying pipe 7. The lower part of the cooling tower 5 is provided with a flue gas inlet. The middle part of the scrubbing tower 9 is provided with an inverted funnel-shaped dividing plate 18, which divides the scrubbing tower 9 into a desulfurization zone and a denitrification zone. The top outlet of the dividing plate 18 is connected to a guide pipe 17. A gas distribution plate 16 is fixed to the top of the 7. Gas distribution holes 24 are evenly distributed on the outer side of the bottom of the gas distribution plate 16. Liquid delivery ring pipes 13 are fixed on the outer wall of the spray tower 9 above and below the dividing plate 18 and on the upper outer wall of the cooling tower 5. Multiple connecting pipes 12 are arranged in a circular array above and below the liquid delivery ring pipes 13. A spray pipe 10 is fixed to the other end of the connecting pipe 12. An atomizing nozzle 11 is fixed to the other end of the spray pipe 10. A demister 6 is provided on the upper part of the cooling tower 5.

[0020] During operation, high-temperature flue gas enters from the flue gas inlet at the bottom of cooling tower 5. As it flows upward within cooling tower 5, it is cooled and dust-removed by cooling water sprayed from atomizing nozzles 11 within cooling tower 5. The flue gas also passes through demister 6 to remove water mist. Then, it enters the desulfurization zone at the bottom of spray tower 9 through flue gas conveying pipe 7. In the desulfurization zone, the flue gas is desulfurized by desulfurizing agent sprayed from atomizing nozzles 11 at the bottom of spray tower 9. Then, it enters the dividing plate 18, passes through the guide pipe 17, and enters the gas distribution plate 16 for even gas distribution before being discharged into the denitrification zone. There, it is denitrified by denitrifying agent sprayed from atomizing nozzles 11 at the bottom of spray tower 9, and finally discharged from the gas outlet at the top of spray tower 9.

[0021] In Example 2, based on Example 1, the top of the air distribution plate 16 is conical, and the denitrification agent falling to the top of the air distribution plate 16 will flow down. The bottom of the inner cavity of the air distribution plate 16 is a conical shape with a high center and a low outer side.

[0022] A demister 20 is fixed at the lower part of the dividing plate 18. After the flue gas in the desulfurization zone has completed desulfurization, the atomized denitrification agent will be removed by the demister 20 when it passes through the dividing plate 18, and then the flue gas will enter the guide pipe 17.

[0023] The spray tower 9 is provided with a filler layer 14 below the atomizing nozzle 11.

[0024] The outer wall of the spray tower 9 below the gas distribution plate 16 is fixedly connected with a reflux pipe 19, the lower end of the reflux pipe 19 is fixedly connected with a denitration agent storage tank 22, the denitration agent storage tank 22 is provided with a liquid pumping pipe 15, a liquid supplementing pipe and a liquid discharging pipe, the other end of the liquid pumping pipe 15 is connected with the liquid conveying ring pipe 13 at the upper portion of the spray tower 9, the liquid pumping pipe 15 is provided with a liquid pump 21 and a filter 1. During denitration, the liquid pump 21 pumps the denitration agent in the denitration agent storage tank 22, and then the denitration agent is filtered by the filter 1 and sent into the liquid conveying ring pipe 13 at the upper portion of the spray tower 9, and then the denitration agent is sprayed from the atomizing nozzle 11 at the upper portion of the spray tower 9 to perform denitration. The denitration agent falling during denitration is collected by the dividing plate 18, and then the denitration agent is refluxed into the denitration agent storage tank 22 through the reflux pipe 19 to be recycled, and new denitration agent can be supplemented through the liquid supplementing pipe at regular time.

[0025] The lower portion of the spray tower 9 is provided with a liquid pumping pipe 23, a liquid supplementing pipe and a liquid discharging pipe, the other end of the liquid pumping pipe 23 is connected with the liquid conveying ring pipe 13 at the lower portion of the spray tower 9, the liquid pumping pipe 23 is provided with a liquid pump 8 and a filter 2. During desulfurization, the liquid pump 21 pumps the desulfurization agent at the lower portion of the spray tower 9, and then the desulfurization agent is filtered by the filter 2 and sent into the liquid conveying ring pipe 13 at the lower portion of the spray tower 9, and then the desulfurization agent is sprayed from the atomizing nozzle 11 at the lower portion of the spray tower 9 to perform desulfurization, and new desulfurization agent can be supplemented through the liquid supplementing pipe at regular time.

[0026] The bottom of the cooling tower 5 is provided with a blowdown pipe, the lower portion of the cooling tower 5 is provided with a circulating pipe 4, the other end of the circulating pipe 4 is connected with the liquid conveying ring pipe 13 on the cooling tower 5, the circulating pipe 4 is provided with a filter 3, a water storage tank 2, a liquid pump 1 and a heat exchanger 3. The water storage tank 2 is provided with a water filling pipe, the cooling water at the lower portion of the cooling tower 5 is filtered by the filter 3 after passing through the lower portion of the circulating pipe 4, and then the cooling water is sent into the water storage tank 2, and then the cooling water is pumped and pressurized by the liquid pump 1, and then the cooling water is sent into the liquid conveying ring pipe 13 on the cooling tower 5 after heat exchange by the heat exchanger 3, and then the cooling water is sprayed from the atomizing nozzle 11 in the cooling tower 5 to perform spray cooling.

[0027] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be combined appropriately to form other embodiments that those skilled in the art can understand.

[0028] In the description of the utility model, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and do not require the utility model to be necessarily constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model.

Claims

1. A high-temperature flue gas spray treatment device, comprising a spray tower (9), the top and lower part of the spray tower (9) are respectively provided with a gas outlet and a gas inlet, the gas inlet is connected with a cooling tower (5) through a smoke conveying pipe (7), the lower part of the cooling tower (5) is provided with a flue gas inlet, characterized in that: The middle part of the spray tower (9) is provided with a reverse funnel-shaped partition disc (18), the partition disc (18) divides the spray tower (9) into a desulfurization zone and a denitration zone, the top outlet of the partition disc (18) is connected with a flow guide pipe (17), the top of the flow guide pipe (17) is fixedly provided with a gas distribution disc (16), the bottom outer side of the gas distribution disc (16) is uniformly provided with gas distribution holes (24), the outer walls of the upper and lower spray towers (9) and the upper outer side wall of the cooling tower (5) are fixedly provided with liquid delivery ring pipes (13), a plurality of connecting pipes (12) are circularly arranged on the liquid delivery ring pipes (13) in an up-down manner, the other ends of the connecting pipes (12) are fixedly provided with spray pipes (10), the other ends of the spray pipes (10) are fixedly provided with atomizing nozzles (11), and the upper part of the cooling tower (5) is provided with a mist eliminator I (6).

2. A high temperature flue gas spray treatment apparatus according to claim 1, characterised in that: The top of the gas distribution disc (16) is conical, and the bottom of the inner cavity of the gas distribution disc (16) is conical and higher in the middle and lower at the outer side.

3. A high temperature flue gas spray treatment device according to claim 1, characterized in that: The partition disc (18) is fixedly provided with a mist eliminator II (20) at the lower part.

4. A high temperature flue gas spray treatment apparatus according to claim 1, wherein: The atomizing nozzles (11) in the spray tower (9) are all provided below with a filler layer (14).

5. A high temperature flue gas spray treatment device according to claim 1, characterized in that: The outer side wall of the spray tower (9) below the gas distribution disc (16) is fixedly connected with a backflow pipe (19), the lower end of the backflow pipe (19) is fixedly connected with a denitration agent storage tank (22), the denitration agent storage tank (22) is provided with a liquid pumping pipe I (15), a liquid supplementing pipe I and a liquid discharging pipe I, the other end of the liquid pumping pipe I (15) is connected with the liquid delivery ring pipe (13) at the upper part of the spray tower (9), and the liquid pumping pipe I (15) is provided with a liquid pump I (21) and a filter I.

6. A high temperature flue gas spray treatment device according to claim 1, characterized in that: The lower part of the spray tower (9) is provided with a liquid pumping pipe II (23), a liquid supplementing pipe II and a liquid discharging pipe II, the other end of the liquid pumping pipe II (23) is connected with the liquid delivery ring pipe (13) at the lower part of the spray tower (9), and the liquid pumping pipe II (23) is provided with a liquid pump II (8) and a filter II.

7. A high temperature flue gas spray treatment apparatus according to claim 5, wherein: The bottom of the cooling tower (5) is provided with a blowdown pipe, the lower part of the cooling tower (5) is provided with a circulating pipe (4), the other end of the circulating pipe (4) is connected with the liquid delivery ring pipe (13) on the cooling tower (5), and the circulating pipe (4) is provided with a filter III, a water storage tank (2), a liquid pump III (1) and a heat exchanger (3).

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