Flue gas pipeline structure, flue gas emission device and molecular sieve dryer

Abstract

The utility model relates to the technical field of flue gas channel crystallization treatment, and discloses a flue gas pipeline structure, a flue gas emission device and a molecular sieve dryer, the flue gas pipeline structure comprises a flue gas pipeline and a flushing mechanism, the flushing mechanism comprises a spray-washing piece, a water supply piece and a control piece, the spray-washing piece is arranged at the inlet part of the flue gas pipeline, and the water supply piece is arranged at the outlet part of the flue gas pipeline; the water supply part comprises a communicating pipeline and a water pump, the water pump supplies water to the spray-washing part through the communicating pipeline so as to spray water to the inner wall of the flue gas pipeline through the spray-washing part to clean ammonium salt crystals on the inner wall, and the control part is used for controlling the on-off state of the communicating pipeline. When the negative pressure of the flue gas channel is abnormal, the flushing mechanism sprays water to the inner wall of the flue gas pipeline, so that ammonium salt crystals on the inner wall are cleaned; therefore, the condition of frequent shutdown treatment of ammonium salt crystals in the flue gas pipeline in the molecular sieve production process is avoided, the ammonium salt production efficiency is improved, the energy consumption of the dryer is reduced, and the long-term operation condition of the dryer is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas channel crystallization treatment, in particular to a flue gas pipeline structure, a flue gas discharge device and a molecular sieve dryer. Background Art

[0002] In the drying process of molecular sieve production, the flue gas generated by drying and baking is mainly collected and treated through exhaust by induced draft fans. However, since a large amount of ammonium ions and acid radical ions are introduced into the molecular sieve production process, when the flue gas flows into the flue gas duct, the surrounding ambient temperature drops, and complex ammonium salt crystals will form layer by layer on the inner wall of the flue gas duct. At this time, the load of the induced draft fan needs to be continuously increased to ensure the normal negative pressure of the dryer. When the induced draft fan load reaches the maximum value, the dryer will experience abnormal negative pressure and temperature in the drying system caused by poor induced draft, which will affect production and cause the equipment to stop working. In addition, if the crystals in the flue gas duct are not cleaned in time, the crystals will also cause the flue gas duct to be blocked by crystals.

[0003] Because ammonium salt crystals easily absorb moisture and form lumps, are relatively hard, and are easily soluble in water, the current treatment method is mainly to shut down the dryer and then clean the flue gas duct by beating and flushing it with water. However, this frequent shutdown treatment seriously affects the dryer's output, energy consumption, and long-term operation.

[0004] In order to solve the above problems, a device is needed that can effectively clean the ammonium salt crystals in the flue gas channel without stopping the machine. Utility Model Content

[0005] A technical problem to be solved by the utility model is that frequent shutdowns to treat ammonium salt crystals in the flue gas duct seriously affect the production efficiency of the dryer.

[0006] In order to achieve the above-mentioned purpose, the utility model provides, on the one hand, a flue gas duct structure including a flue gas duct and a flushing mechanism, the flushing mechanism including: a spraying part, which is arranged at the inlet part of the flue gas duct; a water supply part, which includes a connecting pipe and a water pump, and the water pump supplies water to the spraying part through the connecting pipe, so as to spray water onto the inner wall of the flue gas duct through the spraying part, thereby cleaning the ammonium salt crystals on the inner wall; and a control part, which is used to control the on-off state of the connecting pipe.

[0007] Optionally, the connecting pipe includes a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is connected to the water pump, and one end of the second connecting pipe is connected to the spray component, wherein the first connecting pipe and the second connecting pipe are connected through a control component.

[0008] Optionally, the second connecting pipe includes a first part and a second part which are perpendicular to each other, wherein the first part is used to be connected to the control component, and the second part extends along the central axis of the flue gas duct and is connected to the spray component.

[0009] Optionally, the control component includes a shut-off valve, and the first communicating pipeline and the second communicating pipeline are detachably connected to connecting ports on both sides of the shut-off valve.

[0010] Optionally, the spraying member includes a conical spiral nozzle, the flue gas duct includes a horizontal section and a vertical section arranged in sequence along the airflow direction, and the center line of the conical spiral nozzle coincides with the center axis of the horizontal section of the flue gas duct.

[0011] The second aspect of the present invention provides a flue gas emission device including a dust collector, a flue gas purification system and the above-mentioned flue gas duct structure, wherein the flue gas duct is connected to the air outlet of the dust collector, one end of the flushing mechanism passes through the top of the dust collector and extends into the flue gas duct through the connection between the flue gas and the flue gas duct, and the flue gas purification system is used to remove harmful substances in the flue gas.

[0012] Optionally, the flue gas purification system includes a quenching tower, an absorption tower and an induced draft fan, wherein the quenching tower is connected to the flue gas duct and is used to condense the flue gas, the absorption tower is connected to the quenching tower and is used to absorb harmful substances in the flue gas, and the induced draft fan is used to drive the flue gas to flow in the flue gas discharge device.

[0013] Optionally, the absorption tower and the quenching tower are connected via an absorption pipeline.

[0014] Optionally, the induced draft fan is connected to the air outlet of the absorption tower.

[0015] A third aspect of the present invention provides a molecular sieve drying device comprising a dryer and the above-mentioned flue gas exhaust device.

[0016] Through the above technical solution, the flushing mechanism provided by the utility model sprays water onto the inner wall of the flue gas duct when negative pressure occurs in the flue gas channel, thereby cleaning the ammonium salt crystals on the inner wall; therefore, the frequent shutdowns to deal with the ammonium salt crystals in the flue gas duct during the ammonium salt production process are avoided, thereby improving the ammonium salt production efficiency, reducing the energy consumption of the dryer, and improving its long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of the smoke exhaust device of the present utility model;

[0018] Figure 2 It is a structural schematic diagram of the flushing mechanism of the present utility model.

[0019] Description of Reference Numerals

[0020] 1. Flue gas duct; 2. Flushing mechanism; 201. Conical spiral nozzle; 202. Connecting pipe; 203. First connecting pipe; 204. Second connecting pipe; 205. Flange; 3. Control element; 301. Shut-off valve; 302. Connecting port; 4. Dust collector; 5. Flue gas purification system; 501. Quenching tower; 502. Absorption tower; 503. Absorption pipe; 504. Induced draft fan; 505. Induced air duct; 506. Filter screen; 507. Absorption screen; 6. Dryer. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings and examples. The detailed description of the following examples and the accompanying drawings are intended to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention. The present invention can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions within the scope of the claims.

[0022] The present invention provides these embodiments to make the present invention thorough and complete, and to fully convey the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangements of parts and steps, material components, numerical expressions and numerical values ​​described in these embodiments should be interpreted as merely exemplary and not as limiting.

[0023] It should be noted that, in the description of this utility model, unless otherwise specified, "plurality" means greater than or equal to two; terms such as "upper," "lower," "left," "right," "inner," and "outer" indicating directions or positional relationships are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] In addition, the terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are simply used to distinguish different parts. "Perpendicular" does not mean perpendicular in the strict sense, but rather means that the positions are within the tolerance range. "Parallel" does not mean parallel in the strict sense, but rather means that the positions are within the tolerance range. "Include" or "comprising" and similar terms mean that the elements listed before the word include the elements listed after the word, and do not exclude the possibility that other elements may also be included.

[0025] It should also be noted that, in the description of this utility model, unless otherwise specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0026] All terms used in this utility model have the same meaning as those understood by ordinary technicians in the field to which this utility model belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0027] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0028] refer to Figure 1 and Figure 2 As shown, the flue gas duct 1 mechanism includes a flue gas duct 1 and a flushing mechanism 2, and the flushing mechanism 2 includes:

[0029] A spray cleaning member is provided at the inlet portion of the flue gas duct 1;

[0030] A water supply component, comprising a connecting pipe 202 and a water pump, wherein the water pump supplies water to the spray cleaning component through the connecting pipe 202, so as to spray water onto the inner wall of the flue gas duct 1 through the spray cleaning component, thereby cleaning the ammonium salt crystals on the inner wall;

[0031] The control component 3 is used to control the on / off state of the connecting pipeline 202.

[0032] A water source may be provided outside the flue gas duct 1 , and the temperature of the water source is higher than the temperature at which the ammonium salt crystallizes, so as to accelerate the dissolution of the ammonium salt crystals while increasing the ambient temperature inside the flue gas duct 1 and reducing the crystallization rate of the ammonium salt inside the flue gas duct 1 .

[0033] The water spraying direction of the spray cleaning part can be set to be the same as the flow direction of the flue gas in the flue gas duct 1, and the flow of the flue gas is used to drive the water sprayed by the spray cleaning part to flow to the inner wall of the flue gas duct 1 at a distance.

[0034] Among them, first open the control component 3 to put the connecting pipe 202 into a connected state, then turn on the water pump to drive the water from the water source to flow to the spray component through the connecting pipe 202, and under the action of the water supply pressure of the water pump, drive the water to spray out from the spray component to cover the inner wall of the flue gas duct 1, thereby cleaning the ammonium salt crystals on the inner wall.

[0035] Therefore, when negative pressure occurs in the flue gas channel, the flushing mechanism 2 provided by the present invention sprays water onto the inner wall of the flue gas duct 1, thereby cleaning the ammonium salt crystals on the inner wall, avoiding frequent shutdowns to deal with the ammonium salt crystals in the flue gas duct 1 during the ammonium salt production process, thereby improving the ammonium salt production efficiency, reducing the energy consumption of the dryer 6, and improving its long-term operation.

[0036] The connecting pipe 202 in the present invention can have any appropriate structure, such as Figure 2 In the illustrated embodiment, the communication line 202 may include a first communication line 203 and a second communication line 204 .

[0037] Among them, the first connecting pipe 203 can be connected to the water pump, the second connecting pipe 204 can be connected to the spray component, and at the same time, the first connecting pipe 203 and the second connecting pipe 204 can be connected through the control component 3, and the control component 3 can control the on-off state of the connecting pipe 202 by controlling the connection or disconnection of the first connecting pipe 203 and the second connecting pipe 204.

[0038] In addition, the axial direction of the first connecting pipe 203 can be arranged in the vertical direction, using the gravity of water to accelerate the flow of water into the spraying part while increasing the initial speed of the water flow sprayed from the spraying part.

[0039] Of course, in some other embodiments, the communication pipeline 202 can be set as a tube. In this case, the control component 3 controls the on-off state of the communication pipeline 202 by controlling the area of ​​the flow cross-section in the tube.

[0040] In some embodiments, the second connecting pipe 204 may include a first portion and a second portion that are perpendicular to each other, so that the second connecting pipe 204 connects the control component 3 and the spray component.

[0041] The first part can be connected to the control part 3, and the second part can extend along the central axis of the flue gas duct 1 and be connected to the spraying part.

[0042] In addition, the first portion may extend along its own axial direction to the inlet of the flue gas duct 1 .

[0043] In some embodiments, the second connecting pipe 204 is detachably connected to the spraying member to facilitate replacement of a damaged spraying member or the second connecting pipe 204 .

[0044] The second connecting pipe 204 and the spraying member may be threadedly connected, and a sealing ring may be provided at the connection between the second connecting pipe 204 and the spraying member to prevent water from overflowing at the connection.

[0045] Of course, in other embodiments, the second connecting pipe 204 and the spray cleaning member can be fixedly connected by welding. It is worth noting that in this case, a sealing ring is not required at the connection between the two.

[0046] In some embodiments, the control component 3 may include a shut-off valve 301, and the first connecting line 203 and the second connecting line 204 may be detachably connected to the connecting ports 302 on both sides of the shut-off valve 301 respectively. By controlling the on-off state between the connecting ports 302 on both sides of the shut-off valve 301, the on-off state of the first connecting line 203 and the second connecting line 204 can be controlled. Of course, in some other embodiments, other appropriate valves for controlling the on-off state of the pipeline may also be included, which will not be elaborated in this article.

[0047] Wherein, sealing members may be provided at the connection points between the first communicating pipe 203 and the second communicating pipe 204 and the shut-off valve 301 to prevent water from overflowing from the sealing points.

[0048] The sealing member may include a flange 205 or a sealing ring.

[0049] In some embodiments, the flue gas duct 1 may include horizontal and vertical sections arranged sequentially along the airflow direction, and the spray cleaning element may include a conical spiral nozzle 201. The centerline of the conical spiral nozzle 201 may coincide with the center axis of the horizontal section of the flue gas duct 1, so that the sprayed water can evenly cover the inner wall of the horizontal section of the flue gas duct 1. The conical spiral nozzle 201 can produce a uniform liquid distribution, forming a conical spray, and has a large spray angle. Therefore, the water mist it sprays can cover the inner wall surface of a section of the flue gas duct 1 to clean the ammonium salt crystals thereon.

[0050] A second aspect of the present invention provides a flue gas discharge device which may include a dust collector 4 , a flue gas purification system 5 and the above-mentioned flue gas duct 1 structure.

[0051] Among them, the flue gas duct 1 is connected to the air outlet of the dust collector 4, one end of the flushing structure passes through the top of the dust collector 4, and extends into the flue gas duct 1 through the connection between the dust collector 4 and the flue gas duct 1. The flue gas purification system 5 is used to remove harmful substances in the flue gas.

[0052] The second connecting pipe 204 of the flushing mechanism 2 can pass through the top cover of the dust collector 4 in a direction perpendicular to the top cover of the dust collector 4, extend into the dust collector 4, and be located in front of the connection between the dust collector 4 and the flue gas duct 1. Of course, in other embodiments, the second connecting pipe 204 can pass through the top of the horizontal section of the flue gas duct 1 and extend into the flue gas duct 1.

[0053] In some embodiments, a flange 205 may be provided at the connection between the second connecting pipe 204 and the top cover of the dust collector 4 to seal it.

[0054] In some embodiments, the flange 205 is fixed to the top cover of the dust collector 4 by bolts, and the second connecting pipe 204 and the flange 205 are fixedly connected by welding to prevent the smoke in the dust collector 4 from overflowing; of course, in some other embodiments, other connection methods can be used, which will not be elaborated in this article.

[0055] In the present invention, the flue gas purification system 5 can have any appropriate structure, such as Figure 1 As can be seen in the illustrated embodiment, the flue gas purification system 5 may include a quenching tower 501 , an absorption tower 502 and an induced draft fan 504 .

[0056] The quenching tower 501 is connected to the air outlet of the flue gas duct 1 and is used to condense the flue gas to separate the moisture in the flue gas.

[0057] A filter 506 may be provided in the quenching tower 501 , and the filter 506 can allow the condensed flue gas to pass through while absorbing moisture separated from the flue gas.

[0058] In some embodiments, the absorption tower 502 is connected to the quenching tower 501 and is used to absorb harmful substances in the flue gas, and the induced draft fan 504 is used to drive the flue gas to flow in the flue gas exhaust device.

[0059] In the absorption tower 502 , multiple layers of absorption nets 507 may be arranged at intervals along the height direction thereof to completely absorb harmful substances in the flue gas.

[0060] In some embodiments, the absorption tower 502 and the quenching tower 501 are connected via an absorption pipe 503 .

[0061] The absorption pipe 503 may include a vertical section and a horizontal section. The vertical section may be connected to the air outlet at the bottom of the quenching tower 501 , and the horizontal section may be connected to the low-side air inlet of the quenching tower 501 .

[0062] In some embodiments, the induced draft fan 504 may be in communication with the air outlet of the absorption tower 502 .

[0063] The absorption system may further include an induced air duct 505 for connecting the top air outlet of the absorption tower 502 to the air inlet of the induced draft fan 504. Of course, in other embodiments, the induced draft fan 504 may be directly disposed at the top air outlet of the absorption tower 502.

[0064] The last aspect of the present invention provides a molecular sieve drying device comprising a dryer 6 and the fume exhaust device as described above.

[0065] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the technical concept of the present invention, various simple variations of the technical solution of the present invention may be made. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple variations and combinations should also be considered as disclosed in the present invention and fall within the scope of protection of the present invention.

Claims

1. A flue gas duct structure, characterized in that: The invention comprises a flue gas duct (1) and a flushing mechanism (2), wherein the flushing mechanism (2) comprises: A spray cleaning member, the spray cleaning member being arranged at the inlet portion of the flue gas duct (1); a water supply component, the water supply component comprising a connecting pipe (202) and a water pump, the water pump supplying water to the spraying component through the connecting pipe (202), so as to spray water onto the inner wall of the flue gas duct (1) through the spraying component, thereby cleaning the ammonium salt crystals on the inner wall; A control member (3) is used to control the on / off state of the communication pipeline (202).

2. The flue gas duct structure according to claim 1, characterized in that: The communication pipeline (202) comprises a first communication pipeline (203) and a second communication pipeline (204), one end of the first communication pipeline (203) is connected to the water pump, and one end of the second communication pipeline (204) is connected to the spray cleaning component. The first communicating pipeline (203) and the second communicating pipeline (204) are connected via the control component (3).

3. The flue gas duct structure according to claim 2, characterized in that: The second communicating pipe (204) comprises a first portion and a second portion perpendicular to each other, The first part is used to connect with the control part (3), and the second part extends along the central axis of the flue gas duct (1) and is connected with the spraying part.

4. The flue gas duct structure according to claim 2, characterized in that: The control component (3) comprises a shut-off valve (301), and the first communicating pipeline (203) and the second communicating pipeline (204) are respectively and detachably connected to the connecting ports (302) on both sides of the shut-off valve (301).

5. The flue gas duct structure according to claim 1, characterized in that: The spray cleaning component comprises a conical spiral nozzle (201), and the flue gas duct (1) comprises a horizontal section and a vertical section arranged in sequence along the airflow direction, and the center line of the conical spiral nozzle coincides with the center axis of the horizontal section of the flue gas duct (1).

6. A smoke exhaust device, characterized in that: The flue gas discharge device comprises a dust collector (4), a flue gas purification system (5) and a flue gas duct (1) structure according to any one of claims 1 to 5, The flue gas duct (1) is connected to the air outlet of the dust collector (4), one end of the flushing mechanism (2) passes through the top of the dust collector (4) and extends into the flue gas duct (1) through the connection between the flue gas duct (1) and the flue gas purification system (5) is used to remove harmful substances in the flue gas.

7. The smoke exhaust device according to claim 6, characterized in that: The flue gas purification system (5) includes a quenching tower (501), an absorption tower (502) and an induced draft fan (504). The quenching tower (501) is connected to the flue gas duct (1) and is used to condense the flue gas. The absorption tower (502) is connected to the quenching tower (501) and is used to absorb harmful substances in the flue gas. The induced draft fan (504) is used to drive the flue gas to flow in the flue gas discharge device.

8. The smoke exhaust device according to claim 7, characterized in that: The absorption tower (502) and the quenching tower (501) are connected via an absorption pipe (503).

9. The smoke exhaust device according to claim 7, characterized in that: The induced draft fan (504) is in communication with the air outlet of the absorption tower (502).

10. A molecular sieve drying device, characterized in that: The molecular sieve drying equipment comprises a dryer (6) and a flue gas exhaust device according to any one of claims 6 to 9.

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