Odor treatment device for alkali recovery boiler

Abstract

The utility model discloses an alkali recovery boiler odor treatment device which comprises a furnace body, an odor inlet pipe, an odor conveying pipe, a pressure maintaining gas storage tank and an air conveying pipe, the odor inlet pipe is communicated with the odor conveying pipe, the odor conveying pipe is communicated with the pressure maintaining gas storage tank, and the two ends of the air conveying pipe are communicated with the pressure maintaining gas storage tank and the furnace body respectively. A burner is arranged at the end, close to the furnace body, of the gas feeding pipe, a sealing plate is slidably connected into the pressure maintaining gas storage tank, a balancing weight is fixedly connected to the sealing plate, a sealing ring is installed on the sealing plate and abuts against the inner wall of the pressure maintaining gas storage tank, and the gas feeding pipe is provided with a flame arrester. The utility model has the beneficial effects that the burner can obtain enough odor and large enough gas supply pressure, so that the burner can stably work and maintain higher burning efficiency, the furnace body can stably output more steam, and the advantage of more sufficient odor burning is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of treatment devices, in particular to an odor treatment device for an alkali recovery boiler. Background Art

[0002] The alkali recovery boiler uses the high-concentration odor generated during the alkali papermaking process as fuel, which is sent into the furnace for combustion to produce steam and reuse as energy. The odor is burned and then discharged to reduce the impact of the waste gas on the environment, which plays a role in energy conservation and environmental protection.

[0003] The Chinese utility model patent with the announcement number CN217109582U discloses a high-concentration odor combustion device for an alkali recovery boiler, comprising an alkali recovery boiler for burning black liquor and a dissolving tank for receiving the melt after combustion, characterized in that the dissolving tank is located at the rear end of the alkali recovery boiler, and odor burners are arranged on both sides of the alkali recovery boiler away from the dissolving tank, the odor burner is connected with the alkali recovery boiler, the odor burner is provided with an odor inlet pipe for introducing high-concentration odor, and a droplet separator and a flame arrester are installed at the outer end of the odor inlet pipe. The high-concentration odor passes through the droplet separator and the flame arrester in sequence and then enters the odor burner, which can remove the moisture that may be contained in the odor while preventing the flashback caused by the low odor flow rate, and the odor burner is far away from the melt entering the dissolving tank above, so as to prevent the low-temperature area of ​​the furnace caused by the combustion and decomposition of the odor in the furnace from having an adverse effect on the melt after the combustion of black liquor.

[0004] Since a large amount of energy is required in the pulp production process, the alkali recovery boiler needs to produce as much steam as possible, and a large amount of odor is consumed in the process of producing steam. When the odor supply is insufficient, the stability of the alkali recovery boiler's working state will be affected, and the odor burner needs to be ignited frequently, resulting in incomplete combustion of the odor. Therefore, the odor treatment device in the prior art has the problem of incomplete odor combustion. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an alkali recovery boiler odor treatment device, which includes a furnace body, an odor inlet pipe, an air delivery pipe, a pressure-maintaining gas storage tank and an air delivery pipe. The alkali recovery boiler odor treatment device has the advantage of more complete odor combustion.

[0006] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is as follows:

[0007] An odor treatment device for an alkali recovery boiler comprises a furnace body, an odor inlet pipe, an air delivery pipe, a pressure-maintaining gas storage tank and an air delivery pipe, wherein the odor inlet pipe is connected to the air delivery pipe, the air delivery pipe is connected to the pressure-maintaining gas storage tank, both ends of the air delivery pipe are respectively connected to the pressure-maintaining gas storage tank and the furnace body, a burner is provided at one end of the air delivery pipe close to the furnace body, a sealing plate is slidably connected inside the pressure-maintaining gas storage tank, a counterweight is fixedly connected to the sealing plate, a sealing ring is installed on the sealing plate, the sealing ring abuts against the inner wall of the pressure-maintaining gas storage tank, and the air delivery pipe is provided with a flame arrester.

[0008] Through such an arrangement: it is ensured that the burner can obtain enough odor and a sufficiently large gas supply pressure, so that the burner can work stably and maintain a high combustion efficiency, and the furnace body can stably output more steam and achieve the advantage of more complete combustion of odor.

[0009] Preferably, the odor inlet pipe is connected to a gas inlet pipe, the odor inlet pipe is provided with an odor one-way valve, the gas inlet pipe is located between the odor one-way valve and the gas pipe, and the gas inlet pipe is provided with a gas one-way valve.

[0010] Through such an arrangement, the working stability of the burner is improved, so that the odor can be fully burned in the burner.

[0011] Preferably, the odor inlet pipe is provided with an inlet three-way valve, and the inlet three-way valve is located between the gas inlet pipe and the gas delivery pipe. The gas delivery pipe is provided with a gas delivery three-way valve, and the odor inlet pipe is connected with the gas delivery pipe through the gas delivery three-way valve. The furnace body is provided with a preheating device, and the preheating device is provided with an air inlet and a gas delivery port. The inlet three-way valve and the gas delivery three-way valve are respectively connected with the air inlet and the gas delivery port of the preheating device.

[0012] Through such an arrangement, it is further ensured that the odor can be fully burned.

[0013] Preferably, the preheating device includes a casing and a heat conducting plate, wherein the heat conducting plate is fixedly mounted on the surface of the furnace body, the casing is fixedly mounted on the furnace body and covers the heat conducting plate, an annular heating groove is provided between the casing and the heat conducting plate, the air inlet and the air delivery port are arranged on the casing, and the air inlet and the air delivery port are both connected to the annular heating groove.

[0014] Through such an arrangement, the function of heating the odor through the preheating device is achieved.

[0015] Preferably, the casing is fixedly connected with a blocking block for blocking the annular heating groove, and the blocking block is located between the air inlet and the air outlet.

[0016] Through such an arrangement, the heating effect of the preheating device on the odor is guaranteed.

[0017] Preferably, the gas inlet pipe is provided with a gas switch valve, and the gas switch valve is located on a side of the gas one-way valve away from the odor inlet pipe.

[0018] Such a setting makes it easier to use and improves safety.

[0019] Preferably, the odor inlet pipe is provided with a droplet separator, and the droplet separator is located on a side of the odor one-way valve away from the gas pipe.

[0020] Through such an arrangement: the liquid can be fully burned in the burner.

[0021] Preferably, the odor inlet pipe is provided with an odor switch valve, and the odor switch valve is located on a side of the droplet separator away from the gas pipeline.

[0022] Such a setting makes it easier to use and improves safety.

[0023] Preferably, the air supply pipe is provided with an air supply one-way valve located between the flame arrester and the pressure-maintaining gas storage tank.

[0024] Through such a setting: the reliability is improved.

[0025] Preferably, the pressure-maintaining gas storage tank is fixedly mounted with a limit switch, and the limit switch is engaged with the counterweight block.

[0026] Through such a setting, it can play a limiting role and improve the reliability of the system.

[0027] Compared with the prior art, the utility model has achieved beneficial technical effects:

[0028] When the odor supplied by the odor inlet pipe is sufficient, the odor can be stored in the pressure-maintaining gas storage tank, and the counterweight block provides downward pressure to the sealing plate, so that the gas in the pressure-maintaining gas storage tank and the air delivery pipe maintains a certain pressure, ensuring that the odor has sufficient air pressure and meets the working requirements of the flame arrester. When the odor supplied by the odor inlet pipe is insufficient, the counterweight block presses the sealing plate downward and pushes the odor in the pressure-maintaining gas storage tank into the air delivery pipe and the burner, so that when the odor supplied by the odor inlet pipe is insufficient and the odor supply is unstable, it can ensure that the burner can obtain enough odor and a large enough gas supply pressure, so that the burner can work stably and maintain a high combustion efficiency, so that the furnace body can stably output more steam, and achieve the advantage of more complete odor combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an alkali recovery boiler odor treatment device in an embodiment of the utility model;

[0030] Figure 2It is a structural schematic diagram of a preheating device in an embodiment of the utility model;

[0031] Figure 3 It is a schematic diagram of the internal structure of the pressure-maintaining gas storage tank in the embodiment of the utility model.

[0032] The technical features indicated by the reference numerals are as follows:

[0033] 11. Furnace body; 12. Shell; 13. Air inlet; 14. Air delivery port; 15. Heat conduction plate; 16. Block; 17. Annular heating groove; 21. Odor inlet pipe; 22. Odor non-return valve; 23. Odor switch valve; 24. Air inlet three-way valve; 25. Air delivery three-way valve; 26. Droplet separator; 31. Gas inlet pipe; 32. Gas non-return valve; 33. Gas switch valve; 41. Gas delivery pipe; 42. Pressure-maintaining gas storage tank; 43. Sealing plate; 44. Counterweight; 45. Sealing ring; 46. Limit switch; 51. Air delivery pipe; 52. Burner; 53. Flame arrester; 54. Air delivery non-return valve. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments, but the scope of protection claimed in the utility model is not limited to the following specific embodiments.

[0035] refer to Figure 1 A device for treating odor of an alkali recovery boiler includes a furnace body 11, an odor inlet pipe 21, an air delivery pipe 41, a pressure-maintaining gas storage tank 42 and an air delivery pipe 51.

[0036] The odor inlet pipe 21 is connected to the gas delivery pipe 41, and the gas delivery pipe 41 is connected to the pressure-maintaining gas storage tank 42. The odor inlet pipe 21 is connected to the gas inlet pipe 31. The odor inlet pipe 21 is provided with an odor check valve 22. The gas inlet pipe 31 is located between the odor check valve 22 and the gas delivery pipe 41. The gas inlet pipe 31 is provided with a gas check valve 32. The odor inlet pipe 21 is provided with an inlet three-way valve 24. The inlet three-way valve 24 is located between the gas inlet pipe 31 and the gas delivery pipe 41. The gas delivery pipe 41 is provided with a gas delivery three-way valve 25. The odor inlet pipe 21 is connected to the gas delivery pipe 41 through the gas delivery three-way valve 25. The furnace body 11 is provided with a preheating device. The preheating device is provided with an air inlet 13 and a gas delivery port 14. The air inlet three-way valve 24 and the gas delivery three-way valve 25 are respectively connected to the air inlet 13 and the gas delivery port 14 of the preheating device. The gas inlet pipe 31 is provided with a gas switch valve 33, which is located on the side of the gas check valve 32 away from the odor inlet pipe 21. The odor inlet pipe 21 is provided with a droplet separator 26, which is located on the side of the odor check valve 22 away from the gas delivery pipe 41. The odor inlet pipe 21 is provided with an odor switch valve 23, which is located on the side of the droplet separator 26 away from the gas delivery pipe 41.

[0037] refer to Figure 1 and Figure 2 The preheating device includes a casing 12 and a heat conducting plate 15, the heat conducting plate 15 is fixedly mounted on the surface of the furnace body 11, the casing 12 is fixedly mounted on the furnace body 11 and covers the heat conducting plate 15, an annular heating groove 17 is arranged between the casing 12 and the heat conducting plate 15, an air inlet 13 and an air delivery port 14 are arranged on the casing 12, and the air inlet 13 and the air delivery port 14 are both connected to the annular heating groove 17. A blocking block 16 for blocking the annular heating groove 17 is fixedly connected to the casing 12, and the blocking block 16 is located between the air inlet 13 and the air delivery port 14.

[0038] refer to Figure 1 and Figure 3 A sealing plate 43 is slidably connected in the pressure-maintaining gas storage tank 42, a counterweight 44 is fixedly connected to the sealing plate 43, a sealing ring 45 is installed on the sealing plate 43, and the sealing ring 45 abuts against the inner wall of the pressure-maintaining gas storage tank 42, and a flame arrester 53 is provided on the air delivery pipe 51. A limit switch 46 is fixedly installed on the pressure-maintaining gas storage tank 42, and the limit switch 46 is clamped with the counterweight 44.

[0039] The two ends of the air supply pipe 51 are respectively connected to the pressure-maintaining gas storage tank 42 and the furnace body 11 . A burner 52 is provided at one end of the air supply pipe 51 close to the furnace body 11 . The air supply pipe 51 is provided with an air supply one-way valve 54 located between the flame arrester 53 and the pressure-maintaining gas storage tank 42 .

[0040] The odor is transported to the pressure-maintaining gas storage tank 42 through the odor inlet pipe 21 and the gas delivery pipe 41, and the sealing plate 43 is pushed upward to increase the volume of the odor that can be stored in the pressure-maintaining gas storage tank 42, so that more odor can be stored in the pressure-maintaining gas storage tank 42. The odor in the pressure-maintaining gas storage tank 42 flows into the burner 52 through the gas delivery pipe 51, and the odor is ignited by the burner 52, so that the odor can be burned on the furnace body 11 and the furnace body 11 generates steam.

[0041] This embodiment has the following advantages:

[0042] When the odor supplied by the odor inlet pipe 21 is sufficient, the odor can be stored in the pressure-maintaining gas storage tank 42, and the counterweight 44 provides downward pressure to the sealing plate 43, so that the gas in the pressure-maintaining gas storage tank 42 and the air supply pipe 51 maintains a certain pressure, ensuring that the odor has sufficient air pressure and meets the working requirements of the flame arrester 53. When the odor supplied by the odor inlet pipe 21 is insufficient, the counterweight 44 presses the sealing plate 43 downward, and pushes the odor in the pressure-maintaining gas storage tank 42 into the air supply pipe 51 and the burner 52, so that when the odor supplied by the odor inlet pipe 21 is insufficient and the odor supply is unstable, it can ensure that the burner 52 can obtain enough odor and a sufficiently large gas supply pressure, so that the burner 52 can work stably and maintain a high combustion efficiency, so that the furnace body 11 can stably output more steam, and achieve the advantage of more complete combustion of the odor.

[0043] When the steam supply of the odor inlet pipe 21 decreases, the gas is input into the odor inlet pipe 21 through the gas inlet pipe 31. The gas in the gas inlet pipe 31 is mixed with the odor in the odor inlet pipe 21 to form a mixed gas, thereby ensuring that the mixed gas supplied to the burner 52 is sufficient, thereby improving the working stability of the burner 52 and allowing the odor to be fully burned in the burner 52.

[0044] The gas one-way valve 22 is provided to prevent the gas in the gas inlet pipe 31 from flowing in the direction away from the gas pipe 41. The gas one-way valve 32 is provided to prevent the gas from entering the gas inlet pipe 31.

[0045] The gas delivery three-way valve 25 delivers the odor in the odor inlet pipe 21 to the preheating device through the air inlet 13, and the odor is heated by the preheating device to increase the temperature of the odor, thereby achieving the effect of preheating the odor. The temperature of the preheated odor is lower than the ignition temperature. When the temperature of the odor is increased when it is delivered to the burner 52, the odor is more likely to be heated to the ignition temperature, thereby further ensuring that the odor can be fully burned.

[0046] When the furnace body 11 is generating steam, the surface temperature of the furnace body 11 will increase, and the heat conducting plate 15 absorbs the heat from the surface of the furnace body 11 and increases the temperature. After the odor enters the annular heating groove 17 through the air inlet 13, it can contact with the heat conducting plate 15, so that the odor can be heated by the heat conducting plate 15. The heated odor is transported to the gas pipe 41 through the gas delivery port 14, thereby realizing the function of heating the odor through the preheating device.

[0047] By setting the blocking block 16, the odor entering the annular heating groove 17 through the air inlet 13 first flows in the direction away from the air outlet 14, so that the odor flows a long distance in the annular heating groove 17 before entering the air outlet 14, ensuring that the odor can fully contact with the heat conduction plate 15, thereby ensuring the heating effect of the preheating device on the odor.

[0048] When there is no need to transport gas through the gas inlet pipe 31, the gas switch valve 33 is closed to stop the flow of gas in the gas inlet pipe 31, which facilitates use and improves safety.

[0049] The droplets entrained in the odor are separated by the droplet separator 26 , thereby reducing the liquid entrained in the odor and allowing the liquid to be fully burned in the burner 52 .

[0050] When it is not necessary to deliver the odor, the odor switch valve 23 is closed to stop the flow of the odor in the odor inlet pipe 21, thereby facilitating use and improving safety.

[0051] By setting the air supply check valve 54, the gas in the air supply pipe 51 is prevented from flowing back, thereby improving the reliability.

[0052] The gas in the pressure-maintaining gas tank 42 increases and pushes the sealing plate 43 and the counterweight 44 to move upward. When the counterweight 44 abuts against the limit switch 46, the limit switch 46 sends an electrical signal, so that it can be judged through the electrical signal that the counterweight 44 and the sealing plate 43 move upward to a higher position. At this time, the input of odor into the pressure-maintaining gas tank 42 is stopped to prevent the counterweight 44 and the sealing plate 43 from stopping moving upward, thereby playing a limiting role and improving the reliability of the system.

[0053] According to the disclosure and teaching of the above specification, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. An odor treatment device for an alkali recovery boiler, characterized in that: The invention comprises a furnace body (11), an odor inlet pipe (21), an air delivery pipe (41), a pressure-maintaining gas storage tank (42) and an air delivery pipe (51), wherein the odor inlet pipe (21) is connected to the air delivery pipe (41), the air delivery pipe (41) is connected to the pressure-maintaining gas storage tank (42), the two ends of the air delivery pipe (51) are respectively connected to the pressure-maintaining gas storage tank (42) and the furnace body (11), a burner (52) is provided at one end of the air delivery pipe (51) close to the furnace body (11), a sealing plate (43) is slidably connected inside the pressure-maintaining gas storage tank (42), a counterweight (44) is fixedly connected to the sealing plate (43), a sealing ring (45) is installed on the sealing plate (43), the sealing ring (45) is in contact with the inner wall of the pressure-maintaining gas storage tank (42), and the air delivery pipe (51) is provided with a flame arrester (53).

2. The alkali recovery boiler odor treatment device according to claim 1 is characterized in that: The odor inlet pipe (21) is connected to a gas inlet pipe (31), the odor inlet pipe (21) is provided with an odor one-way valve (22), the gas inlet pipe (31) is located between the odor one-way valve (22) and the gas delivery pipe (41), and the gas inlet pipe (31) is provided with a gas one-way valve (32).

3. The alkali recovery boiler odor treatment device according to claim 2 is characterized in that: The odor inlet pipe (21) is provided with an inlet three-way valve (24), the inlet three-way valve (24) is located between the fuel gas inlet pipe (31) and the gas delivery pipe (41), the gas delivery pipe (41) is provided with a gas delivery three-way valve (25), the odor inlet pipe (21) is connected to the gas delivery pipe (41) via the gas delivery three-way valve (25), the furnace body (11) is provided with a preheating device, the preheating device is provided with an inlet port (13) and a gas delivery port (14), the inlet three-way valve (24) and the gas delivery three-way valve (25) are respectively connected to the inlet port (13) and the gas delivery port (14) of the preheating device.

4. The alkali recovery boiler odor treatment device according to claim 3 is characterized in that: The preheating device comprises a casing (12) and a heat conducting plate (15); the heat conducting plate (15) is fixedly mounted on the surface of a furnace body (11); the casing (12) is fixedly mounted on the furnace body (11) and covers the heat conducting plate (15); an annular heating groove (17) is provided between the casing (12) and the heat conducting plate (15); the air inlet (13) and the air delivery port (14) are arranged on the casing (12); and the air inlet (13) and the air delivery port (14) are both in communication with the annular heating groove (17).

5. The alkali recovery boiler odor treatment device according to claim 4 is characterized in that: The casing (12) is fixedly connected with a blocking block (16) for blocking the annular heating groove (17); the blocking block (16) is located between the air inlet (13) and the air delivery port (14).

6. The alkali recovery boiler odor treatment device according to claim 2, characterized in that: The gas inlet pipe (31) is provided with a gas switch valve (33), and the gas switch valve (33) is located on a side of the gas one-way valve (32) away from the odor inlet pipe (21).

7. The alkali recovery boiler odor treatment device according to claim 2 is characterized in that: The odor inlet pipe (21) is provided with a droplet separator (26), and the droplet separator (26) is located on a side of the odor one-way valve (22) away from the gas delivery pipe (41).

8. The alkali recovery boiler odor treatment device according to claim 7, characterized in that: The odor inlet pipe (21) is provided with an odor switch valve (23), and the odor switch valve (23) is located on a side of the droplet separator (26) away from the gas delivery pipe (41).

9. The alkali recovery boiler odor treatment device according to claim 1, characterized in that: The air supply pipe (51) is provided with an air supply check valve (54) located between the flame arrester (53) and the pressure-maintaining air storage tank (42).

10. The odor treatment device for an alkali recovery boiler according to claim 1, characterized in that: The pressure-maintaining gas storage tank (42) is fixedly mounted with a limit switch (46), and the limit switch (46) is engaged with the counterweight block (44).

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