Flue gas cooling channel structure of boiler

Abstract

The utility model discloses a flue gas cooling channel structure of a boiler, which is applied to the field of boilers and comprises a boiler barrel, a combustion chamber membrane type wall hearth and a membrane type wall burnout chamber, the boiler barrel, the combustion chamber membrane type wall hearth and the membrane type wall burnout chamber are connected, the bottom of the membrane type wall burnout chamber is communicated with a flue gas steering chamber, and the bottom of the flue gas steering chamber is communicated with a flue gas inlet. One side of the membrane wall burnout chamber is communicated with a high-temperature snake-shaped convection tube group and a low-temperature snake-shaped convection tube group; the snake-shaped structure is arranged, and the contact area between the high-temperature snake-shaped convection tube set and the low-temperature snake-shaped convection tube set and smoke is increased in a transverse snake-shaped mode, so that the purpose of improving the heat exchange efficiency is achieved; cooling water or an agent is conveyed through the conveying pipe and sprayed out through the direct spraying bin, the direct spraying holes and the direct spraying holes, the cooling water or the agent can directly make contact with flue gas, the cooling water can make contact with the flue gas for heat exchange, the temperature of the flue gas is reduced, the agent can be selectively used according to needs, and the flue gas can be treated through the agent.

Description

Technical Field

[0001] The utility model relates to the field of boilers, in particular to a smoke cooling channel structure of a boiler. Background Art

[0002] In the current boiler design, in order to achieve the purpose of efficient combustion and heat absorption, not only a reasonable furnace and burnout chamber must be designed, but also a fully sealed membrane wall structure boiler is required; in the current boiler flue gas cooling channel, the convection area is divided into horizontal flushing and vertical flushing. Under the condition of equal flue gas velocity, the heat transfer coefficient of horizontal flushing is larger than that of vertical flushing; however, under the condition of equal design area of ​​convection tubes, the heat transfer effect of horizontal flushing is better, but the horizontal flushing pipe remains straight, and the contact area with the flue gas is small, so the heat transfer efficiency is not good;

[0003] In order to solve the above problems, we propose a flue gas cooling channel structure for a boiler. Utility Model Content

[0004] The utility model aims to provide a smoke cooling channel structure of a boiler, which has the advantage of being able to increase the heat exchange area and improve the heat exchange effect.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a flue gas cooling channel structure of a boiler, comprising a boiler drum, a combustion chamber membrane fireplace and a membrane wall burnout chamber, the boiler drum, the combustion chamber membrane fireplace and the membrane wall burnout chamber are connected, the bottom of the membrane wall burnout chamber is connected to a flue gas turning chamber, one side of the membrane wall burnout chamber is connected to a high-temperature serpentine convection tube group and a low-temperature serpentine convection tube group; one side of the membrane wall burnout chamber is connected to a flue gas outlet, a delivery pipe is provided inside the flue gas outlet, a direct shower bin and a plurality of direct shower holes are provided on both sides of the delivery pipe, and a plurality of spray nozzles are provided at the bottom of the direct shower hole.

[0006] By adopting the above technical scheme, a high-temperature serpentine convection tube group and a low-temperature serpentine convection tube group are arranged, and a transverse serpentine structure is used to increase the heat exchange area between the pipeline and the flue gas; by arranging a conveying pipe, a direct shower bin, a direct shower hole, and a spray nozzle, cooling water and chemicals can be directly used to cool the flue gas for heat exchange or to treat the flue gas.

[0007] The utility model is further configured as follows: protective circulating water pipes are installed on the inner walls of the membrane-type fireplace chamber and the membrane-type wall burnout chamber of the combustion chamber.

[0008] By adopting the above technical scheme, the protective circulating water pipe is used to protect the membrane fireplace of the combustion chamber, the membrane wall burnout chamber and the inner wall of the flue gas turning chamber, and also plays a role in heat exchange of the flue gas.

[0009] The utility model is further configured as follows: a receiving bucket is fixedly installed on the inner wall of the smoke turning chamber, and the length of the receiving bucket is greater than the lateral length of the low-temperature serpentine convection tube group and the high-temperature serpentine convection tube group.

[0010] The above technical solution is adopted, and the receiving bucket is provided to receive cooling water or medicine.

[0011] The utility model is further configured as follows: one side of the receiving bucket is connected with a discharge pipe, and one end of the discharge pipe is connected with the smoke turning chamber.

[0012] By adopting the above technical solution, a discharge pipe is provided to discharge the cooling water or medicine received by the receiving bucket, and the discharge pipe can be connected to a cooling water tank to facilitate the recycling of cooling water.

[0013] The utility model is further configured as follows: a one-way valve is installed inside the discharge pipe.

[0014] The above technical solution is adopted to control the flow and the closed state inside the discharge pipe through the setting of the one-way valve.

[0015] The utility model is further configured as follows: the inclination angle of the three straight shower holes is not greater than 55°.

[0016] By adopting the above technical solution, the inclination angle of the straight shower hole is not greater than 55°, which can ensure that the cooling water or the agent will not be directly sprayed to the smoke outlet through the smoke outlet.

[0017] The utility model is further configured as follows: a side of the direct shower bin close to the delivery pipe is communicated with the delivery pipe, and the spray nozzle is vertically opened at the bottom of the direct shower bin.

[0018] The above technical solution is adopted to discharge cooling water or medicine through the setting of the spray nozzle, so that the cooling water and the medicine can come into contact with the flue gas.

[0019] The utility model is further configured as follows: a side of the straight shower hole close to the delivery pipe is communicated with the delivery pipe.

[0020] By adopting the above technical solution, through the setting of straight spray holes, water or chemicals are sprayed at an inclined angle. The cooling water directly contacts the flue gas, which can directly generate heat exchange and accelerate the cooling of the flue gas. If it is a chemical, such as a desulfurizer, the flue gas can be desulfurized. The specific chemical can be rotated according to the treatment requirements of the flue gas.

[0021] The utility model is further configured as follows: the top end of the delivery pipe penetrates to the top of the smoke outlet, and the surface of the delivery pipe and the top of the smoke outlet are fixedly sleeved.

[0022] With the above technical solution, the function of the delivery pipe is to transport water, the top end of the delivery pipe can be connected to a water pump, and the water pump can be connected to cooling water or medicine.

[0023] The utility model is further configured as follows: the length of the direct shower chamber away from the conveying pipe is greater than the lateral length of the high-temperature serpentine convection tube group and the low-temperature serpentine convection tube group.

[0024] By adopting the above technical solution, the length of the direct shower chamber away from the delivery pipe is greater than the lateral length of the high-temperature serpentine convection tube group and the low-temperature serpentine convection tube group, so that the sprinkler nozzle can spray water vertically downward.

[0025] In summary, the utility model has the following beneficial effects:

[0026] 1. The utility model sets a serpentine structure and uses a transverse serpentine to extend the contact area between the high-temperature serpentine convection tube group and the low-temperature serpentine convection tube group and the flue gas, thereby achieving the purpose of improving the heat exchange efficiency;

[0027] 2. The utility model transports cooling water or chemicals by setting a delivery pipe, which is sprayed out from the direct shower chamber, direct shower holes and direct shower holes, so that the cooling water or chemicals can directly contact the flue gas. The cooling water can contact and exchange heat with the flue gas to reduce the flue gas temperature, and the chemicals can be selected and used as needed, and the flue gas can be treated by the chemicals. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the utility model;

[0029] Figure 2 This utility model Figure 1 A magnified view of the structure in the middle.

[0030] Figure numerals: 1. boiler drum; 2. combustion chamber membrane fireplace; 3. membrane wall burnout chamber; 4. flue gas turning chamber; 5. high-temperature serpentine convection tube group; 6. low-temperature serpentine convection tube group; 7. flue gas outlet; 8. delivery pipe; 9. direct shower chamber; 10. direct shower hole; 11. spray nozzle; 12. protective circulating water pipe; 13. receiving bucket; 14. discharge pipe. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0032] Embodiment 1:

[0033] refer to Figure 1 and Figure 2A flue gas cooling channel structure of a boiler comprises a boiler drum 1, a combustion chamber membrane fireplace 2 and a membrane wall burnout chamber 3, the boiler drum 1, the combustion chamber membrane fireplace 2 and the membrane wall burnout chamber 3 are connected, the bottom of the membrane wall burnout chamber 3 is connected with a flue gas turning chamber 4, one side of the membrane wall burnout chamber 3 is connected with a high-temperature serpentine convection tube group 5 and a low-temperature serpentine convection tube group 6; one side of the membrane wall burnout chamber 3 is connected with a flue gas outlet 7, a conveying pipe 8 is arranged inside the flue gas outlet 7, and a direct shower bin 9 and a plurality of direct shower holes 10 are arranged on both sides of the conveying pipe 8, and the direct shower holes 10 are connected to the flue gas outlet 7. A plurality of spray nozzles 11 are provided at the bottom; by setting a serpentine structure, a transverse serpentine is used to extend the contact area between the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6 and the flue gas, so as to achieve the purpose of improving the heat exchange efficiency; by setting a delivery pipe 8 to deliver cooling water or chemicals, the cooling water or chemicals are sprayed from the direct spray bin 9, the direct spray hole 10 and the direct spray hole 10, so that the cooling water or chemicals can directly contact the flue gas, the cooling water can contact and exchange heat with the flue gas, and reduce the flue gas temperature, and the chemicals can be selected and used according to needs, and the flue gas can be treated by the chemicals.

[0034] Furthermore, a protective circulating water pipe 12 is installed inside the combustion chamber membrane fireplace 2 and the membrane wall burnout chamber 3. The protective circulating water pipe 12 is used to protect the inner walls of the combustion chamber membrane fireplace 2, the membrane wall burnout chamber 3 and the flue gas turning chamber 4, and also plays a role in heat exchange of the flue gas.

[0035] Furthermore, a receiving bucket 13 is fixedly installed on the inner wall of the smoke turning chamber 4. The length of the receiving bucket 13 is greater than the lateral length of the low-temperature serpentine convection tube group 6 and the high-temperature serpentine convection tube group 5. The receiving bucket 13 is set to receive cooling water or chemicals.

[0036] Furthermore, one side of the receiving bucket 13 is connected to a discharge pipe 14, one end of which is connected to the smoke deflection chamber 4. The discharge pipe 14 is provided to discharge the cooling water or agent received by the receiving bucket 13, and the discharge pipe 14 can be connected to a cooling water tank to facilitate the recycling of cooling water.

[0037] Furthermore, a one-way valve is installed inside the discharge pipe 14 , and the one-way valve is used to control the flow and the closed state inside the discharge pipe 14 .

[0038] Furthermore, the inclination angle of the three straight spray holes 10 is not greater than 55°. The inclination angle of the three straight spray holes 10 is not greater than 55°, which can ensure that the cooling water or the agent will not be directly sprayed to the smoke outlet 7 through the smoke outlet 7.

[0039] Furthermore, one side of the direct shower bin 9 close to the delivery pipe 8 is connected to the delivery pipe 8 , and a spray nozzle 11 is vertically opened at the bottom of the direct shower bin 9 .

[0040] Furthermore, one side of the direct shower bin 9 close to the delivery pipe 8 is connected to the delivery pipe 8, and a spray nozzle 11 is vertically opened at the bottom of the direct shower bin 9. The spray nozzle 11 is arranged to discharge cooling water or medicine so that the cooling water and the medicine can come into contact with the flue gas.

[0041] Furthermore, the side of the straight spray hole 10 close to the conveying pipe 8 is connected to the conveying pipe 8. Through the setting of the straight spray hole 10, water or chemicals are sprayed at an inclined angle. The cooling water directly contacts the flue gas, which can directly generate heat exchange and accelerate the cooling of the flue gas. If it is a chemical, such as a desulfurizer, the flue gas can be desulfurized. The specific chemical can be rotated according to the treatment requirements of the flue gas.

[0042] Furthermore, the top of the delivery pipe 8 penetrates to the top of the smoke outlet 7, and the surface of the delivery pipe 8 and the top of the smoke outlet 7 are fixedly connected. The function of the delivery pipe 8 is to transport water. The top of the delivery pipe 8 can be connected to a water pump, and the water pump can be connected to cooling water or medicine.

[0043] Furthermore, the length of the direct shower chamber 9 away from the delivery pipe 8 is greater than the lateral length of the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6, and the length of the direct shower chamber 9 away from the delivery pipe 8 is greater than the lateral length of the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6, so that the spray nozzle 11 can spray water vertically downward.

[0044] Brief description of the use process: When in use, the combustion chamber membrane fireplace 2 generates smoke due to combustion, and the smoke enters the membrane wall burnout chamber 3 and then enters the smoke turning chamber 4, and then the smoke contacts the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6 from bottom to top, and the water inside the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6 circulates, and the cold energy of the water contacts the heat energy of the smoke to form heat exchange. Since the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6 adopt a serpentine structure, the contact area between the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6 and the smoke will be greatly increased, thereby increasing the heat exchange area and improving the heat exchange efficiency;

[0045] For the flue gas with too high temperature, the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6 cannot quickly meet the heat exchange requirements. Cooling water is introduced through the delivery pipe 8. Under the pressure of the pump, the water enters the direct shower bin 9 and the direct shower hole 10. The direct shower hole 10 sprays the water. The water inside the direct shower bin 9 is vertically discharged through the spray nozzle 11 to completely cover the high-temperature serpentine convection tube group 5 and the low-temperature serpentine convection tube group 6. The directly discharged water will directly contact the flue gas for heat exchange. Finally, the cooling water will contact the receiving bucket 13 and be discharged by the discharge pipe 14.

[0046] If the flue gas needs to be treated, the treatment agent such as desulfurizer is input into the delivery pipe 8, the direct shower bin 9, the direct shower hole 10 and the spray nozzle 11 through a pump connected to the delivery pipe 8 to be discharged and contact the flue gas. Finally, the agent will be received by the receiving bucket 13 and discharged by the discharge pipe 14.

[0047] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A flue gas cooling channel structure of a boiler, comprising a boiler drum (1), a combustion chamber membrane hearth (2) and a membrane wall burnout chamber (3), characterized in that: The boiler drum (1), the combustion chamber membrane fireplace (2) and the membrane wall burnout chamber (3) are connected; the bottom of the membrane wall burnout chamber (3) is connected to a smoke turning chamber (4); one side of the membrane wall burnout chamber (3) is connected to a high-temperature serpentine convection tube group (5) and a low-temperature serpentine convection tube group (6); one side of the membrane wall burnout chamber (3) is connected to a smoke outlet (7); a delivery pipe (8) is provided inside the smoke outlet (7); a direct shower bin (9) and a plurality of direct shower holes (10) are provided on both sides of the delivery pipe (8); and a plurality of spray nozzles (11) are provided at the bottom of the direct shower holes (10).

2. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: Protective circulating water pipes (12) are installed on the inner walls of the combustion chamber membrane-type fireplace (2) and the membrane-type wall burnout chamber (3).

3. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: A receiving bucket (13) is fixedly mounted on the inner wall of the smoke deflection chamber (4), and the length of the receiving bucket (13) is greater than the lateral length of the low-temperature serpentine convection tube group (6) and the high-temperature serpentine convection tube group (5).

4. The flue gas cooling channel structure of a boiler according to claim 3, characterized in that: One side of the receiving bucket (13) is connected to a discharge pipe (14), and one end of the discharge pipe (14) is connected to the smoke turning chamber (4).

5. The flue gas cooling channel structure of a boiler according to claim 4, characterized in that: A one-way valve is installed inside the discharge pipe (14).

6. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: The inclination angles of the three straight shower holes (10) are not greater than 55°.

7. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: The side of the direct shower chamber (9) close to the delivery pipe (8) is connected to the delivery pipe (8), and the spray nozzle (11) is vertically opened at the bottom of the direct shower chamber (9).

8. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: The side of the straight shower hole (10) close to the delivery pipe (8) is communicated with the delivery pipe (8).

9. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: The top end of the delivery pipe (8) penetrates to the top of the smoke outlet (7), and the surface of the delivery pipe (8) and the top of the smoke outlet (7) are fixedly sleeved.

10. The flue gas cooling channel structure of a boiler according to claim 1, characterized in that: The length of the direct shower chamber (9) away from the delivery pipe (8) is greater than the lateral length of the high-temperature serpentine convection tube group (5) and the low-temperature serpentine convection tube group (6).

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