Device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of active coke regeneration system

Abstract

The utility model discloses a device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an active coke regeneration system, which comprises an ammonium sulfate tower and a regeneration fan, a gas outlet of the ammonium sulfate tower is provided with a recovery mechanism, the recovery mechanism comprises a gas outlet pipe, one end of the gas outlet pipe far away from the ammonium sulfate tower is communicated with a U-shaped pipeline, and the U-shaped pipeline is communicated with the regeneration fan. The end, away from the gas outlet pipe, of the U-shaped pipeline is communicated with a discharge pipe, and the end, away from the U-shaped pipeline, of the discharge pipe is communicated with a booster fan. According to the device for recovering the ammonium sulfate tail gas entrained with the ammonium sulfate solution in the active coke regeneration system, the ammonium sulfate tail gas entrained with the ammonium sulfate solution enters the U-shaped pipeline through the inlet thermometer and the inlet reducer, and the flow speed in the U-shaped pipeline is rapidly reduced due to the fact that the pipeline is enlarged, so that the ammonium sulfate solution is separated out and flows back into the ammonium sulfate tower; ammonium sulfate crystals are prevented from being attached to an impeller of the booster fan to damage dynamic balance of the booster fan, long-time operation of the fan is guaranteed, and normal operation of the system is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonium sulfate solution preparation, in particular to a device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system. Background Art

[0002] The activated coke desulfurization and denitrification process is a dry flue gas treatment technology that utilizes the adsorption function of activated coke to simultaneously remove sulfur oxides, nitrogen oxides, and smoke from flue gas and recover sulfur resources. The regeneration tower of the process analysis system is heated by a hot air furnace to achieve the regeneration of the activated coke in the regeneration tower, so that the high-concentration SO2 gas released by the activated coke is extracted from the analysis tower through a pipeline and enters the regeneration gas preparation ammonium sulfate system using the suction force of the regeneration fan. The prepared ammonium sulfate tail gas will enter the booster fan through a pipeline and be discharged through the chimney.

[0003] Ammonium sulfate tail gas is generated in the process of preparing ammonium sulfate solution. The ammonium sulfate tail gas will carry a large amount of ammonium sulfate solution and be discharged through pipelines and fans. If it operates in this way for a long time, ammonium sulfate crystals will adhere to the booster fan impeller, destroying the dynamic balance of the booster fan, causing the fan to be unable to operate for a long time, thereby affecting the normal operation of the system. If the ammonium sulfate tail gas delivery pipeline is connected to the booster fan outlet (positive pressure area), the system thrust of the ammonium sulfate tail gas pipeline will be insufficient to overcome the positive pressure of the booster fan outlet, resulting in pressure buildup in the ammonium sulfate tail gas pipeline, and the tail gas cannot be discharged normally, causing the ammonium sulfate solution to overflow. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system, which solves the problems of ammonium sulfate crystals adhering to the booster fan impeller and destroying the dynamic balance of the booster fan, and the system thrust of the ammonium sulfate tail gas pipeline being insufficient to overcome the positive pressure at the booster fan outlet, resulting in pressure buildup in the ammonium sulfate tail gas pipeline, inability to discharge the tail gas normally, and overflow of the ammonium sulfate solution.

[0005] To achieve the above purpose, the utility model is implemented by the following technical scheme: a device for recovering ammonium sulfate tail gas entrained with ammonium sulfate solution in an activated coke regeneration system, comprising an ammonium sulfate tower and a regeneration blower, wherein the gas outlet of the ammonium sulfate tower is provided with a recovery mechanism;

[0006] The recovery mechanism includes an outlet pipe, one end of the outlet pipe away from the ammonium sulfate tower is connected to a U-shaped pipe, and the other end of the U-shaped pipe away from the outlet pipe is connected to a discharge pipe, the other end of the discharge pipe away from the U-shaped pipe is connected to a booster fan, a reflux pipe is arranged at the bottom of the U-shaped pipe, an ammonium sulfate reflux valve is arranged at the water outlet of the U-shaped pipe, an inlet thermometer is arranged on the surface of the outlet pipe, an outlet pressure gauge and an outlet thermometer are arranged on the surface of the discharge pipe in sequence, a bottom liquid level gauge is arranged below the U-shaped pipe, and a reflux pipe thermometer is arranged on the surface of the reflux pipe.

[0007] Preferably, the air outlet of the regeneration fan is connected to an air inlet pipe, and the end of the air inlet pipe away from the regeneration fan is connected to the air inlet of the ammonium sulfate tower.

[0008] Preferably, both ends of the reflux pipe are fixedly connected with a first flange, the top of the ammonium sulfate tower is provided with an observation hole, and the top of the observation hole and the bottom of the U-shaped pipe are fixedly connected with a second flange through a connecting pipe.

[0009] Preferably, the first flange is threadedly connected to the opposite side of the second flange by bolts.

[0010] Preferably, a cavity is provided inside the reflux pipe, and the inner wall of the cavity is filled with heat-insulating material.

[0011] Preferably, the thermal insulation material is made of rock wool.

[0012] Beneficial Effects

[0013] The utility model provides a device for recovering ammonium sulfate tail gas entrained with ammonium sulfate solution in an activated coke regeneration system. Compared with the prior art, it has the following beneficial effects:

[0014] (1) The device for recovering ammonium sulfate tail gas from the activated coke regeneration system and entraining ammonium sulfate solution, wherein the ammonium sulfate tail gas entraining ammonium sulfate solution passes through an inlet thermometer and an inlet reducer and enters a U-shaped pipe. As the pipe becomes larger, the flow rate in the U-shaped pipe decreases rapidly, thereby causing the ammonium sulfate solution to precipitate and flow back into the ammonium sulfate tower, thereby preventing ammonium sulfate crystals from adhering to the booster fan impeller and destroying the dynamic balance of the booster fan, thereby ensuring that the fan can operate for a long time without affecting the normal operation of the system.

[0015] (2) The device for recovering ammonium sulfate tail gas from the activated coke regeneration system and entraining ammonium sulfate solution, the ammonium sulfate tail gas passes through a U-shaped pipe, an outlet reducer, an outlet pressure gauge, an outlet thermometer, and is discharged through a booster fan. During normal operation, the outlet pressure is a slight negative pressure, that is, the outlet pressure indication number is required to be between -200Pa and 0Pa, so as to ensure the normal flow of gas in the pipeline and avoid pressure build-up in the ammonium sulfate tail gas pipeline, so that the tail gas can be discharged normally without causing overflow of the ammonium sulfate solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the flow chart of the utility model structure;

[0017] Figure 2 It is a schematic diagram of the return pipe structure of the utility model;

[0018] Figure 3 It is a partial cross-sectional view of the return pipe structure of the utility model.

[0019] In the figure: 1. ammonium sulfate tower; 2. regeneration fan; 3. recovery mechanism; 31. outlet pipe; 32. U-shaped pipe; 33. discharge pipe; 34. booster fan; 35. reflux pipe; 36. ammonium sulfate reflux valve; 37. inlet thermometer; 38. outlet pressure gauge; 39. outlet thermometer; 310. bottom liquid level gauge; 311. reflux pipe thermometer; 4. inlet pipe; 5. first flange; 6. observation hole; 7. second flange; 8. bolts; 9. cavity; 10. insulation material. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Embodiment 1

[0022] See also Figure 1 As shown, the utility model provides a device for recovering ammonium sulfate tail gas entrained with ammonium sulfate solution in an activated coke regeneration system, comprising an ammonium sulfate tower 1 and a regeneration blower 2, high-concentration SO2 gas enters the ammonium sulfate tower 1 through the regeneration blower 2, the air outlet of the regeneration blower 2 is connected with an air inlet pipe 4, and the end of the air inlet pipe 4 away from the regeneration blower 2 is connected with the air inlet of the ammonium sulfate tower 1, and the air outlet of the ammonium sulfate tower 1 is provided with a recovery mechanism 3;

[0023] The recovery mechanism 3 includes an air outlet pipe 31, which is connected to the air outlet of the ammonium sulfate tower 1. The end of the air outlet pipe 31 away from the ammonium sulfate tower 1 is connected to a U-shaped pipe 32, the inlet of the U-shaped pipe 32 is reduced in diameter, and the outlet of the U-shaped pipe 32 is reduced in diameter, that is, the inlet and outlet diameters of the U-shaped pipe 32 are larger than the air outlet pipe 31 and the discharge pipe 33, and the end of the U-shaped pipe 32 away from the air outlet pipe 31 is connected to the discharge pipe 33, and the end of the discharge pipe 33 away from the U-shaped pipe 32 is connected to a booster fan 34, which is used to discharge the ammonium sulfate tail gas, and a reflux pipe 35 is provided at the bottom of the U-shaped pipe 32, which is used to discharge the precipitated The ammonium sulfate solution is discharged back to the ammonium sulfate tower 1, the water outlet of the U-shaped pipe 32 is provided with an ammonium sulfate reflux valve 36, the surface of the outlet pipe 31 is provided with an inlet thermometer 37, the inlet thermometer 37 is used to detect the temperature at the inlet of the U-shaped pipe 32, the surface of the discharge pipe 33 is provided with an outlet pressure gauge 38 and an outlet thermometer 39 in sequence, the outlet thermometer 39 is used to detect the temperature at the outlet of the U-shaped pipe 32, the outlet pressure gauge 38 is used to detect whether the outlet pressure indication is between -200Pa-0Pa, a bottom liquid level gauge 310 is provided below the U-shaped pipe 32, and a reflux pipe thermometer 311 is provided on the surface of the reflux pipe 35.

[0024] Through the arrangement of the above structure, high-concentration SO2 gas enters the ammonium sulfate tower 1 through the regeneration fan 2. In the ammonium sulfate tower, the high-concentration SO2 gas is oxidized and reacts with ammonia water to generate an ammonium sulfate solution. The ammonium sulfate tail gas will carry the ammonium sulfate solution into the outlet pipe 31. The ammonium sulfate tail gas carrying the ammonium sulfate solution passes through the inlet thermometer 37 and the inlet reducer and enters the U-shaped pipe 32. As the pipe becomes larger, the flow rate in the U-shaped pipe 32 decreases rapidly, thereby causing the ammonium sulfate solution to precipitate. Then, the ammonium sulfate tail gas passes through the U-shaped pipe 32, passes through the outlet reducer, the outlet pressure gauge 38, and the outlet thermometer 39, and is discharged through the booster fan 34. During normal operation, the outlet pressure is slightly negative, that is, the outlet pressure indication number is between -200Pa-0Pa, which can ensure the normal flow of gas in the pipe.

[0025] A bottom liquid level gauge 310 is provided under the U-shaped pipe 32 for detecting the material level of the precipitated solution at the bottom. An ammonium sulfate reflux valve is provided under the U-shaped pipe 32. The precipitated ammonium sulfate solution passes through the ammonium sulfate reflux valve, and refluxes into the ammonium sulfate tower 1 through the reflux pipe 35 and the observation hole 6 above the ammonium sulfate tower 1. The reflux pipe thermometer 311 detects the reflux temperature. During actual operation, if the reading of the reflux pipe thermometer 311 is not much different from the readings of the inlet thermometer 37 and the outlet thermometer 39 by ±5°C, it indicates that the system is operating normally. Otherwise, it indicates that the reflux pipe 35 is blocked.

[0026] Embodiment 2

[0027] Based on Example 1, please refer to Figure 1 and Figure 2 As shown, both ends of the reflux pipe 35 are fixedly connected with a first flange 5, an observation hole 6 is provided at the top of the ammonium sulfate tower 1, and the top of the observation hole 6 and the bottom of the U-shaped pipe 32 are fixedly connected with a second flange 7 through a connecting pipe, and the first flange 5 and the second flange 7 are threadedly connected on opposite sides through bolts 8. The arrangement of the flange and the bolts 8 facilitates the installation and disassembly of the reflux pipe 35.

[0028] By setting the above structure, when the return pipe 35 is blocked, the return pipe 35 can be disassembled by screwing the bolts 8 out of the first flange 5 and the second flange 7, so as to facilitate cleaning thereof without affecting the subsequent recovery efficiency.

[0029] Embodiment 3

[0030] In conjunction with Example 1 and Example 2, please refer to Figure 3 As shown, a cavity 9 is provided inside the return pipe 35 , and the inner wall of the cavity 9 is filled with a heat-insulating material 10 . The heat-insulating material 10 is made of rock wool and has good heat-insulating properties.

[0031] By setting the above structure, by setting the heat preservation material 10 in the cavity 9 of the return pipe 35, the heat preservation property of the return pipe 35 can be improved to avoid the temperature during the return flow being too different from the inlet temperature and the outlet temperature.

[0032] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for recovering ammonium sulfate tail gas entrained with ammonium sulfate solution in an activated coke regeneration system, comprising an ammonium sulfate tower (1) and a regeneration blower (2), characterized in that: The gas outlet of the ammonium sulfate tower (1) is provided with a recovery mechanism (3); The recovery mechanism (3) comprises an air outlet pipe (31), one end of the air outlet pipe (31) away from the ammonium sulfate tower (1) is connected to a U-shaped pipe (32), and one end of the U-shaped pipe (32) away from the air outlet pipe (31) is connected to a discharge pipe (33), one end of the discharge pipe (33) away from the U-shaped pipe (32) is connected to a booster fan (34), a reflux pipe (35) is arranged at the bottom of the U-shaped pipe (32), an ammonium sulfate reflux valve (36) is arranged at the water outlet of the U-shaped pipe (32), an inlet thermometer (37) is arranged on the surface of the air outlet pipe (31), an outlet pressure gauge (38) and an outlet thermometer (39) are arranged in sequence on the surface of the discharge pipe (33), a bottom liquid level gauge (310) is arranged below the U-shaped pipe (32), and a reflux pipe thermometer (311) is arranged on the surface of the reflux pipe (35).

2. The device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system according to claim 1, characterized in that: The air outlet of the regeneration fan (2) is connected to an air inlet pipe (4), and one end of the air inlet pipe (4) away from the regeneration fan (2) is connected to the air inlet of the ammonium sulfate tower (1).

3. The device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system according to claim 1, characterized in that: Both ends of the reflux pipe (35) are fixedly connected with a first flange (5), the top of the ammonium sulfate tower (1) is provided with an observation hole (6), and the top of the observation hole (6) and the bottom of the U-shaped pipe (32) are fixedly connected with a second flange (7) via a connecting pipe.

4. The device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system according to claim 3, characterized in that: The first flange (5) and the second flange (7) are threadedly connected at opposite sides thereof via bolts (8).

5. The device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system according to claim 1, characterized in that: A cavity (9) is provided inside the return pipe (35), and the inner wall of the cavity (9) is filled with a heat-insulating material (10).

6. The device for recovering ammonium sulfate solution entrained in ammonium sulfate tail gas of an activated coke regeneration system according to claim 5, characterized in that: The thermal insulation material (10) is made of rock wool.

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