CN202983935U

CN202983935U - Reversed spraying nozzle for wet-method smoke washing

Info

Publication number: CN202983935U
Application number: CN 201220696642
Authority: CN
Inventors: 范怡平; 陈昇; 卢春喜
Original assignee: China University of Petroleum Beijing
Current assignee: China University of Petroleum Beijing
Priority date: 2012-12-14
Filing date: 2012-12-14
Publication date: 2013-06-12
Anticipated expiration: 2022-12-14

Abstract

The utility model discloses a reversed spraying nozzle for wet-method smoke washing, which comprises a nozzle body, wherein liquid inlets are formed at the lower end and in side walls of the nozzle body; a spraying port that can allow a washing solution to be sprayed out upward and axially is formed at the upper end of the nozzle body; the liquid inlet formed at the lower end of the nozzle body is an axial liquid inlet; more than two tangential liquid inlet pipes are uniformly arranged at the periphery of the nozzle body, and connected with the liquid inlets in the side walls of the nozzle body to form two tangential liquid inlets; the nozzle body is internally provided with a rotational flow chamber; and the spraying port, the axial liquid inlet and the tangential liquid inlets are communicated with the rotational flow chamber. The washing solution sprayed by the reversed spraying nozzle can form stable rotary axial flow with a larger divergence angle; the rotary axial flow is bumped and contacted with smoke flowing from the top down in a washer to form a highly-turbulent foam region; and a washing effect is improved. With the adoption of the structure, a coverage rate of washing solution jet flow at the spraying port on a section of the washer is increased; the operating flexibility is improved; and gas and liquid mass transfer is reinforced.

Description

Reverse spraying type wet flue gas washing nozzle

Technical Field

The utility model relates to a contrary formula nozzle that spouts that is used for petrochemical industry, electric power, metallurgical industry wet flue gas to wash belongs to environmental protection technical field.

Background

In the industrial production process of oil refining, chemical industry, electric power, metallurgy and the like, a large amount of flue gas containing harmful gases such as sulfide, nitride, carbon dioxide and the like is inevitably generated, and great harm is caused to the environment. Therefore, the method has important significance for industrial flue gas purification treatment. Among them, wet flue gas scrubbing techniques, which employ some kind of liquid "detergent" and which are in counter-current contact with the flue gas, are the most representative of the scrubbing techniques.

Currently, the counter-spray scrubber is the most common one of the wet flue gas scrubbing devices, and typically there is a dynamic wave scrubber from montgoke corporation, usa. In the counter-spraying type washer, flue gas enters the washer from top to bottom, washing liquid is sprayed upwards through a nozzle, gas and liquid are impacted mutually, a highly turbulent foam zone can be formed under proper operation conditions, the larger the gas-liquid contact area in the foam zone is, the longer the average residence time is, the higher the interface updating speed is, and the better the washing effect is. Obviously, the performance of the washing liquid nozzle is of critical importance, on one hand, the sprayed washing liquid is required to be capable of "covering" the whole section of the washer, otherwise, part of the flue gas in the washer will be "short-circuited" and not contacted with the washing liquid; on the other hand, the jet flow of the nozzle has enough axial momentum, otherwise, after the liquid flow is sprayed out, the low axial speed of the liquid flow can cause weak shearing between gas and liquid in the scrubber and influence momentum exchange and two-phase heat and mass transfer.

Among various back-spray nozzle technologies at home and abroad, a power wave nozzle of Monmonk company in America is a nozzle (http:// www.mecsglobal.com/four-functions-in-one. aspx) with excellent performance. The nozzle is in the form of a single inlet and a single outlet, i.e. an inlet is provided for the liquid flow to enter the nozzle axially upwards, and a nozzle is provided at the upper part of the nozzle for the liquid flow to be sprayed axially upwards into the scrubber. One of the most significant features of the nozzle is that the inner wall of the nozzle is provided with swirl slots, the liquid flow can generate tangential momentum at the outlet to improve the cross-sectional coverage of the liquid phase in the scrubber, and the central part of the nozzle is a straight-through flow channel providing sufficient axial momentum. Thus, the pattern of the outlet flow of the dynamic wave nozzle may be described as "rotating axial flow". In view of the good mass transfer effect of the Menmox dynamic wave nozzle, in recent years, some technologies similar to the dynamic wave nozzle appear in China and abroad, and in order to enable the nozzle outlet to form 'rotating axial flow', the mode that a central through hole is combined with a side wall cyclone component is adopted, for example, CN200610019702.X and CN200620098038.8 adopt a central hole and side flow groove structure; CN200720169735.2, CN00134070.0, CN96240001.7 and CN01251676.7 adopt a central hole and a spinning disk structure; CN02100277.0 and CN02200656.7 adopt a structure of an injection port and a spiral-flow-shaped inner groove, a multi-head parallel spiral groove of CN01273010.6, and the like. However, this type of nozzle has the significant drawback that once the size of the swirl elements (swirl slots, swirl vanes, etc.) is determined, the ratio of the outlet tangential axial flow momentum cannot be adjusted during actual use. For example, when the flue gas treatment capacity is reduced, in order to reduce the operation cost, the flow rate of the washing liquid is generally reduced correspondingly, and the momentum of the axial and tangential liquid flow at the outlet of the nozzle is necessarily reduced at the same time, so that the 'coverage area' of the washing liquid on the section of the scrubber is reduced, and the flue gas washing effect is influenced.

In view of the defects existing in the prior art, the utility model discloses a contrary formula wet flue gas washing nozzle that spouts to increase the axial momentum of blowout efflux, reduce the energy consumption of nozzle, thereby make the mixture that tangential feed liquor and axial feed liquor can be good is researched according to the production design experience of pursuing in this field and relevant field for many years.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a contrary formula wet flue gas washing nozzle that spouts, especially one kind can overcome the not enough of above-mentioned well-known technique existence, and the operation elasticity is big, and the mass transfer is effectual, the flow loss is little contrary formula wet flue gas washing nozzle that spouts.

Therefore, the utility model provides a contrary formula wet flue gas washing nozzle that spouts, it includes: the nozzle comprises a nozzle body, wherein liquid inlets are respectively arranged at the lower end and the side wall of the nozzle body, and a spray port capable of spraying washing liquid upwards along the axial direction is arranged at the upper end of the nozzle body; the nozzle body is internally provided with a cyclone chamber, and the spray port, the axial liquid inlet and the tangential liquid inlet are communicated with the cyclone chamber. The utility model discloses a contrary formula wet flue gas washing nozzle that spouts is a contrary formula nozzle that spouts based on efflux striking and pressure atomization principle.

The back-spraying wet flue gas washing nozzle comprises a tangential liquid inlet pipe, a tangential liquid inlet pipe and a nozzle body, wherein the liquid inlet end of the tangential liquid inlet pipe is lower than the liquid outlet end of the tangential liquid inlet pipe, and an included angle of 15-90 degrees is formed between the central line of the tangential liquid inlet pipe and the central axis of the nozzle body.

The back-spray wet flue gas washing nozzle comprises a cyclone chamber, a back-spray wet flue gas washing nozzle and a back-spray wet flue gas washing nozzle, wherein the cyclone chamber comprises a cylindrical cyclone chamber mixing section and a conical cyclone chamber convergence section positioned at the upper part of the cyclone chamber; the cone angle of the rotational flow chamber convergence section is 30-120 degrees, and the tangential liquid inlet is arranged at the rotational flow chamber mixing section.

The reverse-spray wet flue gas cleaning nozzle is characterized in that the nozzle body is a cylindrical body which is convexly arranged at the upper end of the nozzle body, and the ratio of the inner diameter of the nozzle to the length of the nozzle is 0.5-2.5.

The back-spray wet flue gas cleaning nozzle as described above, wherein the divergence angle of the spray port is 0 to 180 °.

The reverse-spraying wet flue gas washing nozzle can be arranged in a reverse-spraying washer, the inner diameter of the reverse-spraying washer is larger than that of the spraying port, and the ratio of the inner diameter to the inner diameter is 8-20.

The reverse-spraying wet flue gas washing nozzle is characterized in that the inner diameter of the axial liquid inlet is greater than or equal to that of the spray port, and the ratio of the inner diameter of the axial liquid inlet to that of the spray port is greater than or equal to 1 and less than or equal to 4; the inner diameter of the axial liquid inlet is more than or equal to that of the tangential liquid inlet, and the ratio of the inner diameter of the axial liquid inlet to the inner diameter of the tangential liquid inlet is more than or equal to 1 and less than or equal to 4.

The above-mentioned back-spray wet flue gas washing nozzle, wherein a support member is further disposed in the nozzle body, the support member includes a support plate hermetically connected to an inner wall of the nozzle body, and an axial liquid inlet pipe penetrating the support plate, and the swirl chamber is formed between the support plate and the spray outlet.

The reverse-spraying wet flue gas washing nozzle further comprises a base flange, a nozzle fixing flange is formed on the periphery of the lower end of the nozzle body, and the nozzle fixing flange is fixedly connected with the base flange.

The reverse-spraying wet flue gas washing nozzle comprises a nozzle body, a support plate, a positioning cylinder and a base flange, wherein the axial liquid inlet pipe is arranged on the nozzle body, and the axial liquid inlet pipe is arranged on the support plate.

The utility model discloses a structural style of "three entries, single export" produces the whirl, has overcome among the well-known washing liquid nozzle and has produced the whirl through whirl groove, spinning disk, helicla flute isotructure that set up in the nozzle, leads to the defect that the proportion of nozzle export tangential, axial liquid momentum can not be adjusted. The utility model discloses a set up the axial inlet all the way under the nozzle to and symmetrical arrangement is at the two tunnel tangential inlets of nozzle side, and the feed liquor volume of axial, tangential inlet is adjusted to the flue gas volume that can handle as required, thereby can guarantee that spout department liquid stream has sufficient diffusion angle (corresponding to the cross-section coverage of washing liquid in the scrubber).

The utility model adopts the structure of respectively feeding liquid in the axial direction and the tangential direction, which can obviously improve the operation elasticity of the nozzle and strengthen the mass transfer, when the total liquid volume is fixed, if the proportion of the tangential liquid flow is improved, the expansion angle (coverage surface) of the liquid flow at the nozzle is increased; and the axial speed of the jet flow at the outlet of the nozzle is increased by increasing the proportion of the axial liquid flow, the rigidity of the jet flow is larger, and the impact strength is enhanced.

The utility model discloses a set up tangential inlet central line and nozzle body the central axis contained angle at 15 ~ 90 within ranges, can increase the axial momentum of blowout efflux, reduce the energy consumption of nozzle and make tangential feed liquor and axial feed liquor realize good mixture.

In addition, the cone angle of the convergent section of the swirl chamber is controlled, so that three liquid flows are mixed and then contracted through the convergent section, and the three liquid flows are accelerated to form rotary axial flow with larger rigidity. The spray nozzle is large in diameter, the circulating cleaning solution can run at a high solid content rate without blocking the spray nozzle, and the proper ratio of the inner diameter of the spray nozzle to the length of the spray nozzle is set, so that certain coarse atomization and a large expansion angle are guaranteed after jet flow is sprayed.

Because the utility model discloses a nozzle spun "rotatory axial flow" has sufficient "rigidity", when efflux and flue gas carried out the striking, the liquid film surface at first produced unstable fluctuation, under the effect of air current shearing force, Marangoni (Marangoni) effect reinforcing, the liquid film breakage becomes the droplet, gas-liquid area of contact increases, form high turbulent motion foam district, the gas-liquid is double-phase constantly to be updated in the foam district, the turbulence of droplet crowd in this region has been reinforceed, the surface is more updated rapidly, the mass transfer effect is strengthened, the washing effect improves.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein,

FIG. 1 is a sectional view of the reverse-spraying wet flue gas washing nozzle of the present invention;

FIG. 2 is a top view of the structure of the back-spray wet flue gas scrubbing nozzle of the present invention;

FIG. 3 is a schematic view of the reverse-spray wet flue gas washing nozzle according to the present invention;

FIG. 4 is a partial schematic view of the nozzle of the wet back-spray type flue gas cleaning nozzle of the present invention, showing the position of the expansion angle θ;

FIG. 5 is a schematic side view of the back-spray wet flue gas scrubbing nozzle of the present invention;

fig. 6 is a schematic view of the three-dimensional structure of the back-spray wet flue gas washing nozzle of the present invention.

The reference numbers illustrate:

1. tangential liquid inlet 2, axial liquid inlet 3, spray nozzle 4 and convergence section of cyclone chamber

5. Mixing section 6 of swirl chamber, base flange 7, positioning cylinder 8 and supporting component

81. Supporting plate 82, axial liquid inlet pipe 9, sealing ring 10 and nozzle body

11. Tangential liquid inlet pipe 12, cyclone chamber 13 and nozzle fixing flange

Detailed Description

The utility model provides a novel washing liquid nozzle of nozzle exit washing liquid tangential, axial momentum in adjustable scrubbing tower, the utility model discloses the key part of nozzle lies in, produces the whirl through the structural style of "three entries, single export", has overcome among the well-known washing liquid nozzle and has produced the whirl through whirl groove, spinning disk, helicla flute isotructure that set up in the nozzle, leads to the defect that the proportion of nozzle export tangential, axial liquid momentum can not be adjusted. In the utility model, the washing liquid enters the nozzles from three liquid inlets respectively; one path is an axial liquid inlet right below the nozzle, and the liquid inlet of the path only provides the axial momentum of liquid flow; the tangential momentum is provided by two tangential liquid inlets symmetrically arranged on the side surface of the nozzle, and three liquid flows are mixed in the nozzle swirl chamber to form a rotary axial flow which is sprayed out through a spray port (single outlet).

The utility model discloses a contrary formula wet flue gas washing nozzle that spouts can make the washing liquid form stable and the great "rotatory axial flow" of expansion angle by the blowout after, rotatory axial flow "in the scrubber with from the top down flow the flue gas strike, contact, can form the great high turbulent foam district of volume to washing effect has been strengthened. The utility model discloses a nozzle axial, the structure of tangential difference feed liquor can obviously improve nozzle export washing liquid efflux coverage rate and the operation elasticity in the scrubber cross-section to reinforce gas, liquid mass transfer, obtain comparatively ideal washing effect.

The utility model provides a contrary formula wet process flue gas washing nozzle that spouts, include: the nozzle comprises a nozzle body, wherein liquid inlets are respectively arranged at the lower end and the side wall of the nozzle body, and a spray port capable of spraying washing liquid upwards along the axial direction is arranged at the upper end of the nozzle body; the nozzle body is internally provided with a cyclone chamber, and the spray port, the axial liquid inlet and the tangential liquid inlet are communicated with the cyclone chamber.

In order to clearly understand the technical features, objects and effects of the present invention, the following detailed description of the specific embodiments, structures, features and functions of the wet flue gas washing nozzle of the present invention will be made with reference to the accompanying drawings and preferred embodiments. In addition, through the description of the embodiments, the technical means and effects of the present invention adopted to achieve the predetermined purpose can be more deeply and specifically understood, however, the attached drawings are only provided for reference and description, and are not used for limiting the present invention.

As shown in fig. 1 to fig. 6, the utility model provides a reverse-spraying wet flue gas washing nozzle, including: the liquid inlet nozzle comprises a nozzle body 10, wherein liquid inlets are respectively arranged on the lower end and the side wall of the nozzle body 10, a spray port 3 capable of spraying cleaning liquid upwards along the axial direction is arranged at the upper end of the nozzle body, the liquid inlet arranged at the lower end of the nozzle body is an axial liquid inlet 2, more than two tangential liquid inlet pipes 11 are uniformly arranged on the periphery of the nozzle body 10 along the tangential direction and are connected with the liquid inlets on the side wall to form two tangential liquid inlet ports 1; a swirl chamber 12 is formed in the nozzle body 10, and the spray port 3, the axial liquid inlet 2 and the tangential liquid inlet 1 are communicated with the swirl chamber 12. The nozzle of the utility model adopts the structure of respectively feeding liquid in the axial direction and the tangential direction, which can obviously improve the operation elasticity of the nozzle and strengthen the mass transfer, when the total liquid volume is fixed, if the proportion of the tangential liquid flow is improved, the expansion angle (coverage surface) of the liquid flow at the spray port 3 is increased; and the proportion of the axial liquid flow is increased, the jet flow axial speed of the jet orifice 3 is increased, the jet flow rigidity is higher, the impact strength is enhanced, and the washing effect is improved.

The tangential liquid inlet pipes 11 can be uniformly arranged in a plurality, and an even number of the tangential liquid inlet pipes are optimally arranged and symmetrically distributed.

Preferably, the liquid inlet end of the tangential liquid inlet pipe 11 is lower than the liquid outlet end, and an included angle alpha of 15-90 degrees is formed between the central line of the tangential liquid inlet 1 and the central axis of the nozzle body 10, so that the cleaning solution entering the cyclone chamber 12 from the tangential liquid inlet 1 along the tangential direction has an axial component force, the axial momentum of the ejected jet flow is increased, the energy consumption of the nozzle is reduced, and the tangential liquid inlet and the axial liquid inlet are well mixed.

In one embodiment, the chamber 12 includes a cylindrical chamber mixing section 5 and a conical chamber converging section 4 located at an upper portion thereof.

Wherein the cone angle beta of the cyclone chamber convergence section 4 is 30-120 degrees, and the tangential liquid inlet 1 is arranged on the cyclone chamber mixing section 5. When the three liquid flows in the axial direction and the tangential direction are mixed in the mixing section 5 of the swirl chamber and then are contracted through the tapered convergence section 4 of the swirl chamber, the rotation axial flow with larger rigidity can be accelerated and formed.

One feasible technical scheme is that the spray outlet 3 is a column-shaped body convexly arranged at the upper end of the nozzle body 10, a large-caliber spray outlet structure is adopted, the circulating cleaning solution can run under a higher solid content rate without blocking the nozzle, the inner diameter D1 of the spray outlet 3 has a proper proportion to the length L of the spray outlet, and the ratio of the inner diameter D1 of the spray outlet 3 to the length L of the spray outlet is usually 0.5-2.5, so that certain coarse atomization and a larger expansion angle are ensured after jet flow is sprayed.

For example, the divergence angle of the ejection orifice 3 may be in the range of 0 to 180 °.

Further, the utility model discloses a contrary formula wet flue gas washing nozzle that spouts sets up in contrary formula scrubber, and the internal diameter D0 of contrary formula scrubber is greater than the internal diameter D1 of blowout port 3 usually, and its ratio scope is 8 ~ 20.

In addition, the inner diameter D2 of the axial liquid inlet 2 is more than or equal to the inner diameter D1 of the spray port 3, and the ratio is 1-4; and the inner diameter D2 of the axial liquid inlet 2 is more than or equal to the inner diameter D3 of the tangential liquid inlet 1, and the ratio of the inner diameter D2 to the inner diameter D3 is 1-4.

In one embodiment, a support member 8 is further disposed in the nozzle body 10, the support member 8 includes a support plate 81 sealingly connected to the inner wall of the nozzle body 10 by a seal 9, an axial liquid inlet pipe 82 penetrating the support plate 81, and the swirl chamber 12 is formed between the support plate 81 and the outlet 3.

The utility model discloses a nozzle still has base flange 6, and the lower extreme periphery of nozzle body 10 forms nozzle mounting flange 13, can pass through bolt fixed connection between nozzle mounting flange 13 and the base flange 6.

In order to keep the supporting plate 81 at a certain position and to make the volume of the cyclone chamber 12 constant, a positioning cylinder 7 is arranged between the axial liquid inlet pipe 82 and the nozzle body 10, and two ends of the positioning cylinder 7 respectively abut against the supporting plate 81 and the base flange 6. As shown in fig. 1, two ends of the positioning cylinder 7 can be respectively embedded in the supporting plate 81 and the base flange 6.

The working principle of the present invention is further explained by a specific embodiment.

Referring to fig. 1, fig. 2, fig. 5 and fig. 6, a front sectional view, a top view, a side view and a three-dimensional perspective view of the structure of the back-spray wet flue gas scrubbing nozzle of the present invention are respectively shown. As can be seen from figure 1, figure 2, figure 5, figure 6, the utility model discloses a contrary formula wet flue gas washing nozzle that spouts is equipped with two tangential inlets 1 along the circumference symmetry of nozzle body 10, an axial inlet 2, and three routes liquid stream gets into the mixing section of swirl chamber 5 and mixes, and through 4 contractions of the convergence section of swirl chamber, mix, spout with higher speed from spout 3 again. The lower part of the inner cavity of the nozzle body 10 is provided with an axial supporting member 8 and a positioning cylinder 7, wherein a supporting plate 81 of the axial supporting member 8 is sealed with the inner wall of the nozzle body 10 through a sealing ring 9. At the lower end of the nozzle body 10, the base flange 6 is connected with the nozzle fixing flange 13 and fixes the nozzle body 10, while the base flange 6 provides a lower end support for the positioning cylinder 7.

Referring to fig. 3, fig. 3 is a schematic view showing a partial enlargement of the back-spray wet flue gas washing nozzle of the present invention. The utility model discloses the design of heavy-calibre is adopted to the blowout port 3 of nozzle, and internal diameter D1 is decided according to the on-the-spot demand, and the design principle is 8 ~ 20 for the ratio of the internal diameter D1 of the reverse spray formula scrubber internal diameter D0 that the nozzle is located and blowout port 3, and blowout port length L is relevant with blowout port internal diameter D1, and blowout port internal diameter D1 is 0.5 ~ 2.5 with the ratio of blowout port length L. The inner diameter D2 of the nozzle axial liquid inlet 2 is designed according to the jet atomization degree and the expansion angle requirement of the ejection port 3, so that a certain proportion exists between the inner diameter of the axial liquid inlet 2 and the ejection port 3, and the ratio range is 1-4 generally. The nozzle tangential liquid inlet 1 plays a role in providing radial components of 'rotating axial flow', increasing the expansion angle of a jet flow outlet and improving the circumferential coverage rate of jet flow; the ratio of the inner diameter D3 of the tangential liquid inlet 1 to the inner diameter D2 of the axial liquid inlet 2 is 1-4, so that a proper expansion angle and rigidity of the rotary axial flow can be ensured; the included angle alpha between the central line of the tangential liquid inlet 1 and the central axis of the nozzle body 10 is in the range of 15-90 degrees, the axial momentum of the jet flow can be properly increased, the energy consumption of the nozzle is reduced, and the tangential liquid inlet and the axial liquid inlet are well mixed. The swirl chamber 12 is required to have enough space, and the ratio of the inner diameter D4 of the swirl chamber 12 to the height H of the mixing section 5 of the swirl chamber is 1-3. The cone angle beta of the converging section 4 of the swirl chamber is in the range of 30-120 degrees, and the rigidity of the rotary axial flow is reduced when the cone angle is too large or too small.

Referring to fig. 4, fig. 4 is a partially enlarged schematic view of the ejection port of the wet flue gas cleaning nozzle of the present invention, showing the position of the expansion angle θ. The expansion angle theta of the nozzle ejection port 3 is adjusted according to the field requirement, particularly the inner diameter of the washing tower, and ranges from 0 degree to 180 degrees, and if only the axial liquid inlet 2 is opened and the tangential liquid inlet 1 is closed, the expansion angle theta of the washing liquid jet ejected from the ejection port 3 approaches 0 degree; when the axial liquid inlet 2 is closed and only the tangential liquid inlet is opened, the divergence angle theta of the jet flow of the cleaning liquid sprayed from the spray port 3 approaches 180 degrees. The divergence angle theta is controlled by the mass flow ratio of axial liquid inlet and tangential liquid inlet, can be designed according to the requirement of the circumferential coverage rate of jet flow, and the determination method is a known technology and is not described again.

The size of the nozzle orifice 3 of the utility model is determined according to the size of the washer, and the included angle alpha between the central axis of the inner diameter D3 of the tangential liquid inlet 1 and the inner diameter D2 of the axial liquid inlet 2, the central axis of the tangential liquid inlet 1 and the nozzle body 10 is related to the energy consumption requirement, the washing effect requirement and the operable range requirement of the washer. For example, when the ratio of the inner diameter of the washer to the diameter of the spout 3 is 16, if the inner diameter of the spout 3 is 10mm, the height of the washer is 1500mm, and the air velocity is 10m/s, in order to make the optimum washing area appear at a position above the middle of the washer, the ratio of the inner diameter of the axial liquid inlet 2 to the inner diameter of the spout 3 of the nozzle is 2, the ratio of the inner diameter of the axial liquid inlet 2 to the inner diameter of the tangential liquid inlet 1 of the nozzle is 1.5, the included angle α between the center line of the tangential liquid inlet 1 and the center axis of the nozzle body 10 is 20 degrees, the β of the converging section 4 of the swirling chamber is 90 degrees, and the ratio of the inner diameter of the taper angle 3 to the spout length L.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention. Moreover, it should be noted that the components of the present invention are not limited to the above-mentioned integral application, and various technical features described in the present invention can be selected to be used alone or in combination according to actual needs, so that the present invention naturally covers other combinations and specific applications related to the invention of the present invention.

Claims

1. The reverse-spraying wet flue gas washing nozzle is characterized by comprising: the nozzle comprises a nozzle body, wherein liquid inlets are respectively arranged at the lower end and the side wall of the nozzle body, and a spray port capable of spraying washing liquid upwards along the axial direction is arranged at the upper end of the nozzle body; the nozzle body is internally provided with a cyclone chamber, and the spray port, the axial liquid inlet and the tangential liquid inlet are communicated with the cyclone chamber.

2. The reverse-spray wet flue gas washing nozzle as claimed in claim 1, wherein the liquid inlet end of the tangential liquid inlet pipe is lower than the liquid outlet end, and an included angle of 15-90 ° is formed between the central line of the tangential liquid inlet and the central axis of the nozzle body.

3. The reverse spray wet flue gas scrubbing nozzle of claim 1 wherein said swirl chamber comprises a cylindrical swirl chamber mixing section and a conical swirl chamber converging section at the upper portion thereof; the cone angle of the rotational flow chamber convergence section is 30-120 degrees, and the tangential liquid inlet is arranged at the rotational flow chamber mixing section.

4. The wet flue gas cleaning nozzle of claim 1, wherein the nozzle opening is a cylindrical body protruding from the upper end of the nozzle body, and the ratio of the inner diameter of the nozzle opening to the length of the nozzle opening is 0.5 to 2.5.

5. The back-spray wet flue gas cleaning nozzle according to claim 4, wherein the divergence angle of the spray port is 0 to 180 °.

6. The reverse spray wet flue gas scrubbing nozzle according to claim 1, wherein said nozzle is capable of being installed in a reverse spray scrubber having an inner diameter greater than that of said nozzle opening by a ratio of 8 to 20.

7. The back-spray wet flue gas scrubbing nozzle according to claim 1, wherein the inner diameter of said axial liquid inlet is equal to or greater than the inner diameter of said nozzle, and the ratio of said inner diameter to said inner diameter is equal to or greater than 1 and equal to or less than 4; the inner diameter of the axial liquid inlet is more than or equal to that of the tangential liquid inlet, and the ratio of the inner diameter of the axial liquid inlet to the inner diameter of the tangential liquid inlet is more than or equal to 1 and less than or equal to 4.

8. The wet flue gas scrubbing nozzle as claimed in any one of claims 1 to 7, wherein a support member is further disposed in said nozzle body, said support member comprises a support plate sealingly connected to an inner wall of said nozzle body, an axial liquid inlet pipe passing through said support plate, and said swirl chamber is formed between said support plate and said outlet.

9. The reverse spray wet flue gas scrubbing nozzle of claim 8 wherein said nozzle further comprises a base flange, said nozzle body having a lower periphery forming a nozzle mounting flange, said nozzle mounting flange being fixedly attached to said base flange.

10. The reverse spray wet flue gas scrubbing nozzle of claim 9 wherein a positioning cylinder is disposed between said axial inlet pipe and said nozzle body, said positioning cylinder having two ends abutting against said support plate and said base flange, respectively.