CN212492373U - Desulfurizing tower equipment for CFB (circulating fluidized bed) semi-dry method - Google Patents

Abstract

The utility model belongs to the technical field of flue gas desulfurization technique and equipment, a desulfurizing tower equipment for CFB semi-dry process is disclosed. The desulfurization tower apparatus for the CFB semi-dry process includes: the desulfurizing tower comprises a desulfurizing tower body, wherein a reaction cavity is formed in the desulfurizing tower body, and the bottom of the desulfurizing tower body is provided with a Venturi device communicated with the reaction cavity; and the atomizing channel is fixed on the inner wall of the desulfurizing tower body along the circumferential direction of the reaction cavity, one end of the atomizing channel is communicated with the high-pressure atomizing device outside the desulfurizing tower body, and a plurality of atomizing nozzles communicated with the atomizing channel are formed on the atomizing channel at intervals along the circumferential direction of the reaction cavity. Wherein, the atomizing nozzle is constructed to form a positive included angle between the spraying direction of the atomizing nozzle and the horizontal plane, so that the atomized liquid in the atomizing channel can be sprayed towards the upper area of the reaction cavity through the atomizing nozzle under the driving of the high-pressure atomizing device. The utility model discloses a desulfurizing tower equipment can reduce the phenomenon of tower wall wearing effectively and take place, reduces the material circulation volume and can improve desulfurization efficiency.

Description

Desulfurizing tower equipment for CFB (circulating fluidized bed) semi-dry method

Technical Field

The utility model belongs to the technical field of flue gas desulfurization technique and equipment, concretely relates to a desulfurizing tower equipment for CFB semi-dry process.

Background

The CFB semi-dry desulfurization technology is widely applied in the domestic flue gas desulfurization technical field due to high efficiency and high reliability. The CFB semi-dry desulfurization technology adopts the principle of a circulating fluidized bed, is combined with a bag-type dust collector, and realizes higher desulfurization efficiency through multiple cycles of high-concentration materials, and can also be called as a fluidized bed reactor. When the desulfurization tower is used, the flue gas to be treated enters the interior of the desulfurization tower from the bottom of the tower, and contacts and reacts with the sprayed desulfurization solid particles (such as slaked lime dry powder) and humidifying water. The flow speed of the flue gas in the tower is designed in the range of high relative speed of solid phase and gas phase, so that the material layer is in a suspension state. SO in flue gas₂The calcium sulfite is generated by absorption of slaked lime, new surfaces continuously appear to participate in the reaction by friction, and the desulfurization solid particles brought out of the tower by the flue gas are collected by a subsequent dust remover and flow back to the desulfurization tower again to participate in the reaction.

In order to obtain higher desulfurization efficiency, the CFB semi-dry desulfurization tower in the prior art generally increases the circulating return amount of desulfurization solid particles (such as slaked lime dry powder), increases the circulating multiplying power of the desulfurization solid particles, and increases the contact and retention time of gas, liquid and solid phases, thereby obtaining higher desulfurization efficiency. However, a great negative effect is caused by the sharp increase of the desulfurized solid particles in the tower, and the characteristics of the CFB semi-dry process desulfurization tower determine that the solid particles are distributed in a ring nucleus manner in the tower, namely, the air flow and the particles in the central area are high in entrainment flow speed and high in turbulence, the particles are obviously separated from the air flow when the solid particles are closer to the side wall area, and the fine particles are easy to form large particles and slide along the side wall area, so that the friction between the desulfurized solid particles and the tower wall is more severe. Thus, once the system structure and flow field design are not reasonable, the abrasion of the tower wall is easy to occur, especially in the junction area of the gradually expanding section and the vertical section with the most intense turbulence in the tower.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned whole or partial problem, the utility model aims to provide a desulfurizing tower equipment for CFB semi-dry process can reduce the phenomenon emergence that the tower wall worn effectively, reduces the material circulation volume and can improve desulfurization efficiency.

The desulfurization tower apparatus for the CFB semi-dry process includes: the desulfurizing tower comprises a desulfurizing tower body, wherein a reaction cavity is formed in the desulfurizing tower body, and the bottom of the desulfurizing tower body is provided with a Venturi device communicated with the reaction cavity; and the atomizing channel is fixed on the inner wall of the desulfurizing tower body along the circumferential direction of the reaction cavity, one end of the atomizing channel is communicated with the high-pressure atomizing device outside the desulfurizing tower body, and a plurality of atomizing nozzles communicated with the atomizing channel are formed on the atomizing channel at intervals along the circumferential direction of the reaction cavity. Wherein, the atomizing nozzle is constructed to form a positive included angle between the spraying direction of the atomizing nozzle and the horizontal plane, so that the atomized liquid in the atomizing channel can be sprayed towards the upper area of the reaction cavity through the atomizing nozzle under the driving of the high-pressure atomizing device.

Further, the desulfurizing tower body includes back taper body diffuser section and the cylinder vertical section that links to each other with the back taper body diffuser section along its vertical direction from bottom to top, and the venturi device sets up in the bottom of back taper body diffuser section, and wherein, atomizing channel fixes the position that links to each other of back taper body diffuser section and cylinder vertical section.

Further, the venturi device may be comprised of one or more equal diameter channel structures.

Further, the atomizing passage is constructed as a complete ring-shaped pipe body fixed on the inner wall of the desulfurization tower body, or the atomizing passage is constructed as two semi-ring-shaped or a plurality of arc-shaped pipe bodies fixed on the inner wall of the desulfurization tower body.

Further, the inner diameter of the pipe body is 0.5% -2.5% of the inner diameter of the vertical section of the cylinder.

Further, the desulfurization tower apparatus further comprises an anti-wear structure formed at the bottom of the nebulization channel, the anti-wear structure being configured to: one end of the baffle is connected with the surface of the atomization channel, the other end of the baffle extends along the inner wall close to the desulfurizing tower body, and an included angle is formed between the baffle and the vertical direction.

Further, the baffle is constructed as a straight plate body or an arc-shaped plate body bent away from the inner wall of the desulfurization tower body.

Further, the desulfurizing tower equipment also comprises a plurality of atomizing channels which are arranged at intervals along the vertical direction.

Further, the atomizing nozzle is communicated with the atomizing channel along the vertical direction, so that the spraying direction of the atomizing nozzle is perpendicular to the horizontal plane.

Further, each atomizing nozzle is evenly distributed on the circumference of the reaction cavity.

Further, the atomizing nozzle comprises an inlet flow channel communicated with the atomizing channel and an outlet flow channel which is coaxially connected and communicated with the inlet flow channel, a generatrix of the inlet flow channel is in a circular arc shape bent towards the inside, and the outlet flow channel is in a straight cylinder shape.

The utility model discloses a desulfurizing tower equipment for CFB semi-dry process has the following advantage in several respects:

1) the desulfurization tower equipment provided by the embodiment of the utility model can effectively reduce the erosion of the inner wall by the flue gas and the slaked lime particles by arranging the atomization channel, thereby effectively reducing or avoiding the abrasion phenomenon of the inner wall of the desulfurization tower body;

2) the atomizing nozzle of the atomizing channel of the desulfurizing tower equipment provided by the embodiment of the utility model can enable the slaked lime particles which are close to the descending of the side wall area to be in the ascending fluidization state again, and meanwhile, the atomized water drops sprayed by the atomizing nozzle can further strengthen the reaction of the slaked lime particles and the flue gas, thereby improving the desulfurizing effect of the side wall area;

3) the atomization channel of the desulfurizing tower equipment provided by the embodiment of the utility model can be used as an auxiliary cooling measure in the reaction cavity, and can also further strengthen the gas-liquid-solid reaction in the reaction cavity, thereby further improving the desulfurizing efficiency;

4) the atomization channel of the desulfurization tower equipment provided by the embodiment of the utility model can replace the atomization nozzle in the original reaction cavity and can also be combined with the original atomization nozzle in the reaction cavity, so that the desulfurization reaction in the reaction cavity can be flexibly adjusted;

5) the desulfurization tower equipment provided by the embodiment of the utility model effectively improves the desulfurization efficiency and further reduces the total amount of the return ash through the arrangement of the atomization channel, thereby reducing the abrasion of the inner wall of the desulfurization tower body to the maximum extent;

6) the utility model discloses desulfurizing tower equipment's overall structure is simple, can reduce the investment cost of equipment effectively.

Drawings

Fig. 1 is a schematic structural view of a desulfurization tower apparatus for a CFB semi-dry process according to an embodiment of the present invention;

FIG. 2 is a schematic view of a configuration of a desulfurization tower apparatus for a CFB semi-dry process shown in FIG. 1 in a direction A-A;

FIG. 3 is a schematic structural view of a first embodiment of the nebulization channel shown in FIG. 1;

FIG. 4 is a schematic structural view of a second embodiment of the nebulization channel shown in FIG. 1;

fig. 5 is a schematic sectional view of the structure of the atomizing nozzle shown in fig. 3 and 4.

Detailed Description

For better understanding of the purpose, structure and function of the present invention, the desulfurizing tower apparatus for CFB semi-dry process of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 and 2 illustrate the structure of a desulfurization tower apparatus 100 for a CFB semi-dry process according to an embodiment of the present invention. As shown in fig. 1 and 2, the desulfurization tower apparatus 100 for the CFB semi-dry process includes: the desulfurization tower comprises a desulfurization tower body 1, wherein a reaction cavity 11 is formed in the desulfurization tower body 1, and a Venturi device 12 communicated with the reaction cavity 11 is arranged at the bottom of the desulfurization tower body 1; and an atomizing channel 2 fixed on the inner wall of the desulfurizing tower body 1 along the circumferential direction of the reaction chamber 11, wherein one end of the atomizing channel 2 is communicated with a high-pressure atomizing device (not shown in the figure) outside the desulfurizing tower body 1, and a plurality of atomizing nozzles 21 (shown in fig. 3 or fig. 4) communicated with the atomizing channel 2 are formed on the atomizing channel 2 at intervals along the circumferential direction of the reaction chamber 11. Wherein the atomizing nozzle 21 is configured such that the spraying direction thereof forms a positive angle with the horizontal plane, so that the atomized liquid in the atomizing passage 2 can be sprayed toward the upper region of the reaction chamber 11 through the atomizing nozzle 21 under the driving of the high-pressure atomizing device.

The utility model discloses desulfurizing tower equipment 100 is when using, form desulfurization solid channel (not shown in the figure) and atomizing nozzle (not shown in the figure) on the lateral wall of desulfurizing tower body 1 respectively with desulfurization solid particle (like lime hydrate granule) and humidification water injection desulfurizing tower body 1's reaction chamber 11 in, pending flue gas passes through venturi device 12 simultaneously and gets into the reaction chamber 11 of desulfurizing tower body 1 in to contact and take place the reaction with lime hydrate granule and humidification water, in order to accomplish the desulfurization of flue gas. The desulfurized flue gas is collected by a collecting device at the top of the desulfurizing tower body 1, and the slaked lime particles brought out of the tower by the flue gas are collected by a subsequent dust remover and flow back to the reaction cavity 11 of the desulfurizing tower body 1 again to participate in the reaction. In the process of desulfurizing the flue gas in the reaction cavity 11, the slaked lime particles are distributed in a ring nucleus manner in the tower, namely, the airflow in the central area and the particles are high in entrainment flow velocity and severe in turbulence and in an ascending fluidization state (namely, a state B shown in fig. 1), the slaked lime particles are more obviously separated from the airflow when being closer to the side wall area, and fine particles are easy to form large particles to slide along the side wall area, so that the slaked lime particles and the inner wall of the desulfurizing tower body 1 are more severely rubbed.

The utility model discloses desulfurizing tower equipment 100 is provided with atomizing passageway 2 on the inner wall of desulfurizing tower body 1, and a plurality of atomizing nozzle 21 that form on atomizing passageway 2 can make the atomized liquid in atomizing passageway 2 pass through atomizing nozzle 21 and spray towards the top region of reaction chamber 11 under high-pressure atomizing device's drive. In this way, when the flue gas and the slaked lime particles slide down along the sidewall region, the high-pressure atomized liquid can impact the flue gas and the slaked lime particles in the opposite direction, so that not only can the friction of the particles against the inner wall be effectively prevented, but also the slaked lime particles can be returned to the region of the reaction chamber 11 in the rising fluidized state to further perform the desulfurization reaction.

With the above arrangement, the desulfurization tower apparatus 100 for the CFB semi-dry method according to the embodiment of the present invention has the following advantages:

1) the desulfurization tower equipment 100 provided by the embodiment of the utility model can effectively reduce the erosion of the inner wall by the flue gas and the slaked lime particles by arranging the atomization channel 2, thereby effectively reducing or avoiding the abrasion phenomenon of the inner wall of the desulfurization tower body 1;

2) the atomizing nozzle 21 of the atomizing passage 2 of the desulfurizing tower apparatus 100 according to the embodiment of the present invention can make the slaked lime particles descending near the side wall region be in the ascending fluidization state again (i.e. B shown in fig. 1), and the atomized water droplets sprayed from the atomizing nozzle 21 can further enhance the reaction between the slaked lime particles and the flue gas, thereby improving the desulfurizing effect of the side wall region;

3) the atomization channel 2 of the desulfurizing tower apparatus 100 of the embodiment of the present invention can be used as an auxiliary cooling measure in the reaction chamber 11, and can further enhance the gas-liquid-solid reaction in the reaction chamber 11, so as to further improve the desulfurizing efficiency;

4) the atomization channel 2 of the desulfurization tower apparatus 100 according to the embodiment of the present invention can replace the atomization nozzle in the original reaction chamber 11, and can also be combined with the original atomization nozzle in the reaction chamber 11, so that the desulfurization reaction in the reaction chamber 11 can be flexibly adjusted;

5) the desulfurization tower device 100 of the embodiment of the present invention further reduces the total amount of the return ash by effectively improving the desulfurization efficiency through the arrangement of the atomization passage 2, thereby reducing the wear of the inner wall of the desulfurization tower body 1 to the maximum extent;

6) the utility model discloses desulfurizing tower equipment 100's overall structure is simple, can reduce the investment cost of equipment effectively.

It should be noted here that the high-pressure atomizing device is understood to be a device capable of treating the liquid in an atomized state and of supplying a high pressure so that the atomized liquid can be ejected to the outside through the atomizing nozzle 21 of the atomizing passage 2. Meanwhile, the pressure of the atomized liquid provided by the high-pressure atomization device can be adjusted, so that the atomized liquid sprayed by the high-pressure atomization device can reversely wash large-particle lime hydrate particles back to an ascending fluidization state. It should also be noted that a positive included angle is understood that the spraying direction of the atomizing nozzle 21 is located above the horizontal plane of the atomizing channel 2 to satisfy the practical purpose of the embodiment of the present invention.

Preferably, as shown in fig. 1, the desulfurization tower body 1 may include an inverted conical diffusion section 13 and a cylindrical vertical section 14 connected to the inverted conical diffusion section 13 from bottom to top along a vertical direction thereof, and the venturi device 12 is disposed at a bottom of the inverted conical diffusion section 13. Wherein the atomizing channel 2 is fixed at the position where the inverted cone diffusing section 13 is connected with the cylinder vertical section 14. Through the arrangement, on one hand, the joint of the inverted cone diffusion section 13 and the cylinder vertical section 14 is usually welded, residual stress is easily generated by welding, so that the position is easy to break, and the connection strength and the stability of the whole structure of the position can be directly improved by fixing the atomizing channel 2 at the joint; on the other hand, in general, the inverted cone diffuser 13 is configured as an inverted cone structure, so that when the flue gas enters the reaction chamber 11 through the venturi device 12, the gas flow at the inverted cone diffuser is in a diffusion state until the flue gas rises to the cylindrical vertical section 14 and then is in an upward fluidization state. Therefore, the friction of the slaked lime particles with the inner wall of the desulfurization tower body 1 is more severe at the cylindrical vertical section 14. Thus, the utility model discloses desulfurizing tower equipment 100 fixes atomizing passageway 2 in the position that links to each other of back taper body diffuser 13 and cylinder vertical section 14, also be located the bottom edge of cylinder vertical section 14 promptly, can reduce the flue gas and the erode of slaked lime granule to nearly wall department to the at utmost, can also guarantee the stability of the pressure of the high pressure atomized liquid of atomizing nozzle 21 simultaneously to can prevent the fretting phenomenon of the inner wall of desulfurizing tower body 1 more effectively from taking place.

In a preferred embodiment, the atomizing channel 2 can be configured as a complete ring-shaped tube body 20 fixed on the inner wall of the desulfurization tower body 1, or the atomizing channel 2 can be configured as a plurality of semi-ring-shaped tube bodies 20 fixed on the inner wall of the desulfurization tower body 1. Through this setting, when atomizing passageway 2 constructs for complete annular body 20, atomizing passageway 2 constructs for an annular duct promptly, can improve atomizing passageway 2's installation effectiveness like this, makes the utility model discloses desulfurizing tower equipment 100's overall structure is more simple. And when the atomizing channel 2 is constructed as a plurality of semi-annular tube bodies 20, that is, the atomizing channel 2 is constructed as two half annular pipes or four quarter annular pipes, such atomizing channel 2 is formed by splicing a plurality of pipes, so that the volume of a single pipe can be reduced, the processing and production of the single pipe can be facilitated, and the processing difficulty is effectively reduced.

In a preferred embodiment, the inner diameter of the tubular body 20 may be 0.5% to 2.5% of the inner diameter of the cylindrical vertical section 14. Through this setting, the influence that body 20 caused to the air current of treating the desulfurated flue gas in reaction chamber 11 can be avoided effectively in the setting of the internal diameter size of body 20 to can guarantee the going on smoothly of flue gas desulfurization effectively. For example, the tubular body 20 may have an inner diameter ranging from 50mm to 500mm, preferably from 100mm to 400mm, and the cylindrical vertical section 14 may have an inner diameter ranging from 3m to 15 m.

In a preferred embodiment as shown in fig. 3 and 4, the desulfurization tower apparatus 100 may further include an anti-wear structure 22 formed at the bottom of the nebulizing channel 2, and the anti-wear structure 22 may be configured to: one end of the baffle is connected with the surface of the atomizing channel 2, the other end of the baffle extends along the inner wall close to the desulfurizing tower body 1, and an included angle is formed between the baffle and the vertical direction. Through this setting, baffle one end links to each other with the surface of atomizing passageway 2, and the other end extends along the inner wall that is close to desulfurizing tower body 1 to become the contained angle with vertical direction, make the baffle can block flue gas and lime hydrate granule effectively, thereby can avoid flue gas and lime hydrate granule to the erodeing of back taper diffusion zone 13 and the junction of cylinder vertical section 14 effectively, and then can prevent that this position from producing the phenomenon of abrasiveness and taking place.

Preferably, the baffle may be configured as a straight plate body or an arc-shaped plate body bent away from the inner wall of the desulfurization tower body 1. In the first embodiment of the wear structure 22 shown in fig. 3, the baffle may be welded to the pipe 20 using an angle iron structure; in a second embodiment of the wear structure 22 shown in fig. 4, the baffle can be fixed at a position below the atomizing channel 2 and is fixedly connected with the inner wall of the desulfurizing tower body 1.

Preferably, the baffle plate can also be connected with the atomizing channel 2 by adopting an anti-abrasion tile with a semicircular structure or an anti-abrasion pipe with a semicircular structure.

In a preferred embodiment, the desulfurization tower apparatus 100 may further include a plurality of atomization passages 2 arranged at intervals in the vertical direction. By this arrangement, when the pressure of one atomizing passage 2 is insufficient or damaged, the other atomizing passages 2 can be opened to continuously supply stable high-pressure atomized liquid. Of course, if the size of the desulfurization tower apparatus 100 is large, it is also possible to provide a wider range of high-pressure atomized liquid by setting the adjacent atomization passages 2 to a certain distance and simultaneously opening them. This setting can further provide stable high-pressure atomized liquid, so that the utility model discloses desulfurizing tower equipment 100 can reduce the erosion phenomenon that flue gas and lime hydrate granule caused to the inner wall of desulfurizing tower body 1 through high-pressure atomized liquid to can improve bulky desulfurizing tower equipment 100's desulfurization efficiency effectively.

In a preferred embodiment as shown in fig. 3 and 4, the atomizing nozzle 21 can communicate with the atomizing channel 2 in a vertical direction such that the spray direction of the atomizing nozzle 21 is perpendicular to the horizontal plane. Through this setting, because the regional flue gas of limit wall and lime hydrate granule can follow vertical direction lapse with the inner wall after the contact, high-pressure atomized liquid can exert vertical ascending power to the flue gas of the regional landing of limit wall and lime hydrate granule through atomizing nozzle, can make the regional landing of limit wall flue gas and lime hydrate granule's atress bigger like this to can more do benefit to the flue gas and the lime hydrate granule is in rising fluidization state again.

Preferably, the atomizing nozzles 21 are uniformly distributed in the circumferential direction of the reaction chamber 11, so that the spraying range of the high-pressure liquid sprayed out through the atomizing nozzles 21 is more uniform, and the stress of the flue gas and the slaked lime particles in the reaction chamber 11 is more uniform. Preferably, the number of atomizing nozzles 21 is an even number. Preferably, the atomizing nozzles 21 may include at least four oppositely disposed. Further preferably, the atomizing nozzles 21 may include eight relatively disposed in the circumferential direction of the reaction chamber 11.

In a preferred embodiment shown in fig. 5, the atomizing nozzle 21 may include an inlet flow passage 211 communicating with the atomizing passage 2 and an outlet flow passage 212 coaxially connected to and communicating with the inlet flow passage 211, a generatrix C of the inlet flow passage 211 being configured in a circular arc shape curved toward the inside, and the outlet flow passage 212 being configured in a straight cylindrical shape. Preferably, the spray of the atomizing nozzle 21 through the outlet flow passage 212 is in the form of a fan spray or a cone spray. Further preferably, the various parts of the atomizing nozzle 21 may be dimensioned: the outlet flow passage 212 has an outlet diameter d₀Height h of outlet flow channel 212₁Is 1.25d₀Inlet diameter d of inlet channel 211₁Can be 1.12d₀The radius R of the generatrix C may be 1.56d₀Height h of atomizing nozzle 21₂Is 2.84d₀. Through the arrangement, the jet flow diffusion angle alpha of the atomizing nozzle 21 is about 15 degrees, so that the atomizing nozzle 21 can obtain a larger jet flow diffusion angle, the spraying range of the high-pressure atomized liquid through the atomizing nozzle 21 can be effectively improved, and the high-pressure atomized liquid can better act on the smoke and the slaked lime particles close to the wall.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "central," "vertical," "horizontal," "top," "bottom," "inner," "outer," "circumferential," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A desulfurization tower apparatus for a CFB semi-dry process, comprising:

the desulfurizing tower comprises a desulfurizing tower body, wherein a reaction cavity is formed in the desulfurizing tower body, and the bottom of the desulfurizing tower body is provided with a Venturi device communicated with the reaction cavity; and

the atomization channel is fixed on the inner wall of the desulfurization tower body along the circumferential direction of the reaction cavity, one end of the atomization channel is communicated with a high-pressure atomization device outside the desulfurization tower body, and a plurality of atomization nozzles communicated with the atomization channel are formed on the atomization channel at intervals along the circumferential direction of the reaction cavity;

the atomizing nozzle is constructed in a way that the spraying direction of the atomizing nozzle forms a positive included angle with the horizontal plane, so that the atomized liquid in the atomizing channel can be sprayed towards the upper area of the reaction cavity through the atomizing nozzle under the driving of the high-pressure atomizing device.

2. The desulfurization tower apparatus for a CFB semi-dry process according to claim 1, wherein the desulfurization tower body comprises an inverted cone diffusion section and a cylindrical vertical section connected to the inverted cone diffusion section from bottom to top in a vertical direction thereof, the venturi device is disposed at a bottom of the inverted cone diffusion section, and wherein the atomization passage is fixed at a position where the inverted cone diffusion section is connected to the cylindrical vertical section.

3. The desulfurization tower apparatus for a CFB semi-dry process according to claim 2, wherein the atomization passage is constructed as a complete ring-shaped pipe body fixed on the inner wall of the desulfurization tower body, or is constructed as two semi-ring-shaped or a plurality of arc-shaped pipe bodies fixed on the inner wall of the desulfurization tower body.

4. The desulfurization tower apparatus for a CFB semi-dry process according to claim 3, wherein the inner diameter dimension of the pipe body is 0.5 to 2.5% of the inner diameter dimension of the vertical section of the cylinder.

5. The desulfurization tower apparatus for CFB semi-dry process according to claim 1, further comprising an abrasion prevention structure formed at the bottom of the atomization passage, the abrasion prevention structure being configured to: one end of the baffle is connected with the surface of the atomization channel, the other end of the baffle extends along the inner wall close to the desulfurizing tower body, and an included angle is formed between the baffle and the vertical direction.

6. The desulfurization tower apparatus for a CFB semi-dry process according to claim 5, wherein the baffle is constructed as a straight plate body or an arc-shaped plate body bent away from the inner wall of the desulfurization tower body.

7. The desulfurization tower apparatus for a CFB semi-dry process according to claim 5, comprising a plurality of the atomization passages which are spaced apart in a vertical direction.

8. The desulfurization tower apparatus for a CFB semi-dry process according to any one of claims 1 to 7, wherein the atomizing nozzles communicate with the atomizing passage in a vertical direction such that the spraying directions of the atomizing nozzles are perpendicular to a horizontal plane.

9. The desulfurization tower apparatus for a CFB semi-dry process according to claim 8, wherein the atomizing nozzles are uniformly distributed in the circumferential direction of the reaction chamber.

10. The desulfurization tower apparatus for a CFB semi-dry process according to claim 9, wherein the atomizing nozzle includes an inlet flow passage communicating with the atomizing passage and an outlet flow passage coaxially connected and communicating with the inlet flow passage, a generatrix of the inlet flow passage is configured in a circular arc shape curved toward the inside, and the outlet flow passage is configured in a right circular cylinder shape.

Images