Flue gas purification washing tower

Abstract

The utility model relates to a flue gas purification washing tower which comprises a washing tower body, a demister, a reverse cleaning spray header and a demister are sequentially arranged at the upper part in the washing tower body from top to bottom, and the reverse cleaning spray header sprays upwards towards the demister; an annular groove and a water seal ring are arranged between the backwashing spray header and the demister, the lower end of the water seal ring is inserted into the annular groove, the inner ring height of the annular groove is greater than the outer ring height, and the outer diameter of the annular groove is smaller than the inner diameter of the washing tower body; a baffle is arranged above the smoke passing hole in the middle of the annular groove, the edge of the baffle is located over the annular groove, and the diameter of the baffle is larger than that of an inner ring of the annular groove. According to the device, water after washing cannot directly fall onto the demister below, so that the burden of the demister is reduced, the demisting effect cannot be influenced, potential problems of corrosion, blockage and the like caused by excessive water accumulated on the surface area of the demister are avoided, and the performance and the service life of the demister are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas purification equipment technical field, concretely relates to a flue gas purification scrubbing tower. BACKGROUND

[0002] In the field of flue gas purification technology, scrubbing tower as an important air purification equipment is widely used in industrial waste gas treatment process to remove particulate matter, gaseous pollutants and other harmful substances in flue gas. The traditional scrubbing tower design usually includes tower body, spraying system, demister and mist eliminator and other key components, these components work together to achieve efficient flue gas purification effect.

[0003] Specifically, the tower body as the main structure of the scrubbing tower provides the necessary space for the entire purification process. Above the tower body, PTFE (polytetrafluoroethylene) wire mesh demister and FRP (glass fiber reinforced plastic) baffle mist eliminator are usually arranged from top to bottom. PTFE wire mesh demister performs well in removing fine droplets in flue gas due to its excellent corrosion resistance and demisting efficiency. FRP baffle mist eliminator further removes mist in flue gas through its unique baffle design to ensure the cleanliness of the discharged gas.

[0004] However, in actual operation, the surface of PTFE wire mesh demister is prone to accumulate particulate matter and pollutants, causing blockage problem. To solve this problem, the existing technology usually sets an upward cleaning spray head between PTFE wire mesh demister and FRP baffle mist eliminator. The spray head effectively prevents the blockage of PTFE wire mesh demister by regularly spraying cleaning liquid to flush its surface.

[0005] Although this design solves the blockage problem of PTFE wire mesh demister to some extent, it also brings new challenges. Since the spray head cleans upward, the rinsed water will directly fall on the FRP baffle mist eliminator below. This not only may increase the burden of FRP baffle mist eliminator, affecting its mist removal effect, but also may cause excessive water accumulation on the surface of mist eliminator, further causing potential problems such as corrosion and blockage, affecting its performance and service life. SUMMARY

[0006] The technical problem to be solved by the utility model is to provide a flue gas purification scrubbing tower to overcome the deficiencies in the above-mentioned prior art.

[0007] The utility model discloses a technical scheme that solves the above technical problem as follows: a flue gas purification washing tower, which comprises a washing tower body, a demister, a backwashing spray head and a mist eliminator are sequentially arranged from top to bottom in the upper part of the washing tower body, the backwashing spray head sprays upward toward the demister, an annular groove and a water seal ring are arranged between the backwashing spray head and the mist eliminator, the lower end of the water seal ring is inserted into the annular groove, the inner ring height of the annular groove is greater than the outer ring height, the outer diameter of the annular groove is smaller than the inner diameter of the washing tower body, a baffle is arranged above the smoke hole in the middle part of the annular groove, the edge of the baffle is located directly above the annular groove, and the diameter of the baffle is greater than the inner ring diameter of the annular groove.

[0008] The utility model discloses the beneficial effect is: backwashing spray head carries out spray flushing to the bottom of demister, and the water after washing falls to the top wall of baffle and then slides into the annular groove, when the water level height in the annular groove exceeds the outer ring height of the annular groove, namely, from the outer ring edge of the annular groove, because the diameter of baffle is greater than the inner ring diameter of the annular groove, therefore, the water after washing can not enter the smoke hole, and the flue gas from the bottom of the washing tower body can normally enter the demister from the smoke hole, the water after washing of the device can not directly fall into the mist eliminator below, the burden of the mist eliminator is reduced, the mist elimination effect is not influenced, potential problems such as corrosion and blockage caused by too much water on the surface of the mist eliminator are avoided, and the performance and service life of the mist eliminator are guaranteed.

[0009] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0010] Further, the water seal ring comprises a connecting ring, a flow guide ring and an insertion ring connected in sequence from top to bottom, the lower end of the insertion ring is inserted into the annular groove, and the flow guide ring is in the shape of a bucket.

[0011] Further, the mist eliminator is arranged in the inner ring middle part of the annular groove.

[0012] Further, the inner ring top of the annular groove is connected with a horn-shaped flow resistance ring, and the middle through hole of the flow resistance ring forms the smoke hole.

[0013] Further, the baffle is in the shape of a downward spherical surface.

[0014] Further, the annular groove, the water seal ring and the baffle are fixedly connected through connecting rods.

[0015] Further, the mist eliminator is a FRP baffle plate mist eliminator.

[0016] Further, the demister is a PTFE wire mesh demister. DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 The utility model discloses a Figure 1 The structure amplification diagram of A in the middle is shown;

[0019] Figure 3 The section structure schematic diagram of annular groove, water seal ring and baffle of the utility model is shown.

[0020] In the drawing, the component list represented by each mark is as follows:

[0021] 1, demister;2, backwash spray head;3, mist eliminator;4, annular groove;41, smoke hole;42, resistance ring;5, water seal ring;51, connecting ring;52, flow guide ring;53, plug ring;6, baffle;7, connecting rod. Specific implementation

[0022] The principle and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and not used to limit the scope of the utility model.

[0023] As Figures 1-3 shown, embodiment 1, a flue gas purification washing tower, including washing tower body, washing tower body inside upper portion is provided with demister 1, backwash spray head 2 and mist eliminator 3 from top to bottom in turn, backwash spray head 2 sprays upwards to demister 1, and backwash spray head 2 and mist eliminator 3 are provided with annular groove 4 and water seal ring 5, the lower end of water seal ring 5 is inserted into annular groove 4, the inner ring height of annular groove 4 is greater than the outer ring height, and the outer diameter of annular groove 4 is less than the inner diameter of washing tower body;The upper portion of smoke hole 41 in the middle part of annular groove 4 is provided with baffle 6, and the edge of baffle 6 is located directly above annular groove 4, and the diameter of baffle 6 is greater than the inner ring diameter of annular groove 4.

[0024] Backwash spray head 2 sprays and washes the bottom of demister 1, and the washed water drops to the top wall of baffle 6 and then slides into annular groove 4, when the water level height in annular groove 4 exceeds the outer ring height of annular groove 4, i.e. from the outer ring edge of annular groove 4, because the diameter of baffle 6 is greater than the inner ring diameter of annular groove 4, therefore, the washed water cannot enter smoke hole 41, and the flue gas from the bottom of washing tower body can normally enter demister 1 from smoke hole 41;The washed water of the device does not directly fall into the lower mist eliminator 3, reduces the burden of mist eliminator 3, does not affect the mist elimination effect, avoids potential problems such as corrosion and blockage caused by too much water on the surface of mist eliminator 3, and guarantees the performance and service life of mist eliminator 3.

[0025] Embodiment 2, this embodiment is further improved on the basis of embodiment 1, and the specific embodiments are as follows:

[0026] The water seal ring 5 comprises a connecting ring 51, a flow guide ring 52 and an inserting ring 53 connected in sequence from top to bottom, the lower end of the inserting ring 53 is inserted into the annular groove 4, and the flow guide ring 52 is in the shape of a bucket; the water seal ring 5 is fixed to the inner wall of the scrubbing tower body through the connecting ring 51, and the outer diameter of the connecting ring 51 is consistent with the inner diameter of the scrubbing tower body. The connecting ring 51 is tightly attached to the inner wall of the scrubbing tower body, and the water falling from the baffle 6 can only enter the water seal groove along the flow guide ring 52, and the flue gas cannot overflow from the gap between the connecting ring 51 and the inner wall of the scrubbing tower body.

[0027] Embodiment 3, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0028] The demister 3 is arranged in the inner ring of the annular groove 4. It can avoid the water overflowing from the outer ring of the annular groove 4 from falling into the demister 3, and it is also convenient for the installation and fixation of the demister 3.

[0029] Embodiment 4, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0030] The inner ring top of the annular groove 4 is connected with a trumpet-shaped flow resistance ring 42, and the middle through hole of the flow resistance ring 42 forms a smoke passing hole 41. It further avoids the water falling from the baffle 6 from splashing into the smoke passing hole 41.

[0031] Embodiment 5, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0032] The baffle 6 is in the shape of a downward spherical surface. The baffle 6 in the shape of a spherical surface can not only accelerate drainage, but also can make the falling water evenly distributed.

[0033] Embodiment 6, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0034] The annular groove 4, the water seal ring 5 and the baffle 6 are fixedly connected through the connecting rod 7. The connecting rod 7 connects the annular groove 4, the water seal ring 5 and the baffle 6 into a whole, so as to facilitate quick installation, without the need to install and fix each structure respectively. In specific implementation, the connecting rod 7 is circumferentially arranged with 3, 4 or 5, and the structure is more stable.

[0035] Embodiment 7, this embodiment is a further improvement based on embodiment 1, which is as follows:

[0036] The demister 3 is a FRP baffle demister.

[0037] Embodiment 8, this embodiment is a further improvement on the basis of embodiment 1, which is as follows:

[0038] The defoamer 1 is a PTFE wire mesh defoamer.

[0039] The PTFE polytetrafluoroethylene material has the characteristics of excellent corrosion resistance, self-cleaning, non-stickiness and hydrophobicity, can not only effectively remove liquid droplets with a diameter greater than 3-5 μm, but also filter smaller and tiny liquid foam suspended in the airflow, ensure the quality of the gas at the outlet of the washing tower, and improve the efficiency and stability of the whole process.

[0040] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the utility model, and the ordinary skilled in the art can change, modify, replace and modify the above-mentioned embodiments within the scope of the utility model.

Claims

1. A flue gas cleaning scrubber tower, characterized in that The utility model relates to a washing tower, which comprises a washing tower body, a demister (1), an anti-backwashing spray head (2) and a demister (3) arranged in the washing tower body from top to bottom, the anti-backwashing spray head (2) sprays upward toward the demister (1), an annular groove (4) and a water seal ring (5) are arranged between the anti-backwashing spray head (2) and the demister (3), the lower end of the water seal ring (5) is inserted into the annular groove (4), the inner ring height of the annular groove (4) is greater than the outer ring height, the outer diameter of the annular groove (4) is smaller than the inner diameter of the washing tower body, a baffle (6) is arranged above the smoke passing hole (41) in the middle part of the annular groove (4), the edge of the baffle (6) is located directly above the annular groove (4), and the diameter of the baffle (6) is greater than the inner ring diameter of the annular groove (4).

2. A flue gas cleaning scrubber column according to claim 1, characterized in that The water seal ring (5) comprises a connecting ring (51), a flow guide ring (52) and an insertion ring (53) connected in sequence from top to bottom, the lower end of the insertion ring (53) is inserted into the annular groove (4), and the flow guide ring (52) is in the shape of a bucket; the water seal ring (5) is fixed to the inner wall of the washing tower body through the connecting ring (51), and the outer diameter of the connecting ring (51) is consistent with the inner diameter of the washing tower body.

3. A flue gas cleaning scrubber column according to claim 1, characterized in that The demister (3) is arranged in the middle part of the inner ring of the annular groove (4).

4. A flue gas cleaning scrubber column according to claim 1, characterized in that The inner ring top of the annular groove (4) is connected with a trumpet-shaped flow resistance ring (42), and the middle through hole of the flow resistance ring (42) forms the smoke passing hole (41).

5. A flue gas cleaning scrubber column according to claim 1, characterized in that The baffle (6) is in the form of a downward spherical surface.

6. A flue gas cleaning scrubber column according to claim 1, characterized in that The annular groove (4), the water seal ring (5) and the baffle (6) are fixedly connected through a connecting rod (7).

7. A flue gas cleaning scrubber column according to claim 1, characterized in that The demister (3) is a FRP baffle demister.

8. A flue gas cleaning scrubber column according to claim 1, characterized in that The demister (1) is a PTFE wire mesh demister.

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