CN202237787U - A liquid-encapsulated desulfurization atomizing nozzle - Google Patents

Abstract

The utility model discloses a liquid-in-gas desulfurization atomizing nozzle, comprising an inner-conical slurry nozzle and an inner-conical gas nozzle, wherein the gas nozzle is placed inside the slurry nozzle, a gap is provided between the outer wall of the gas nozzle and the inner wall of the slurry nozzle, a slurry inlet pipe is provided on the outer wall of the slurry nozzle, and the inner circumferential surface of the slurry nozzle is a threaded surface. The pressurized gas enters the gas nozzle with an inner-conical end, is further compressed, and after being ejected from the gas nozzle, it merges with the slurry in the conical spray chamber of the slurry nozzle to form "liquid-in-gas", which is broken under the action of high speed and pressure difference, and the droplets are separated and broken, and finally ejected from the slurry nozzle, so that the slurry is efficiently atomized and the best flue gas desulfurization effect is achieved. The slurry inlet pipe is obliquely connected with the gas nozzle, and the installation angle is consistent with the spiral angle of the threaded structure, which further promotes the formation of a natural spiral vortex when the slurry enters the slurry cavity, and promotes the formation of "liquid-in-gas".

Description

A liquid-encapsulated desulfurization atomizing nozzle

technical field

The utility model relates to a desulfurization atomization nozzle, in particular to a liquid-in-gas type desulfurization atomization nozzle.

Background technique

With the rapid development of thermal power plants, sulfur dioxide emissions are also increasing. The emission of sulfur dioxide is one of the main causes of air pollution and acid rain. How to implement desulfurization projects in coal-fired power plants, improve desulfurization process, and improve desulfurization efficiency are effective means to effectively curb sulfur dioxide emissions. Practice has shown that wet limestone-gypsum wet flue gas desulfurization technology is an efficient desulfurization technology and has been adopted by many large coal-fired power plants. However, at present, the investment in desulfurization equipment is high, and the operation and maintenance costs are high, resulting in high desulfurization costs. Therefore, it is of great economic significance to improve the efficiency of wet desulfurization, reduce the energy consumption of wet desulfurization, and reduce the operating cost of desulfurization.

In the wet desulfurization system, the spray system is the key system, and the nozzle is the core component of the spray system. Atomization can provide a huge contact area between phases and is an important unit operation. Improving the spray quality of nozzles is very important to improve desulfurization efficiency and reduce desulfurization energy consumption. In order to achieve the purpose of high-efficiency desulfurization, it is necessary to build a large-volume desulfurization spray tower, install multiple layers and multiple atomizing nozzles inside, and also need to pump the slurry at the bottom of the spray tower for multiple cycles to improve the utilization rate of the slurry, and the investment cost high. At present, the atomizing nozzles used in the wet desulfurization tower are mainly pressure-type mechanical atomizing nozzles with relatively simple structure, which are mainly divided into solid cone, hollow cone and fan-shaped cone nozzles. The atomization effect of this type of nozzle is not good, the energy consumption is high, and it is easy to block. In order to further improve the atomization effect, reduce investment cost, operation and maintenance cost and energy consumption, it is necessary to develop a high-efficiency desulfurization atomization nozzle.

Contents of the invention

In order to overcome the shortcomings and deficiencies of the prior art, the utility model provides a gas-in-liquid desulfurization atomizing nozzle, which has high atomization efficiency and simple structure, and reduces energy consumption while saving investment and operation and maintenance costs.

The utility model is realized through the following technical solutions:

A gas-in-liquid desulfurization atomization nozzle, comprising a slurry nozzle with an inner cone at the end and a gas nozzle with an inner cone at the end, the gas nozzle is placed inside the slurry nozzle, the outer wall of the gas nozzle is in contact with the There is a gap between the inner walls of the slurry nozzle, the gap constitutes a slurry cavity, the outer wall of the slurry nozzle is provided with a slurry inlet pipe, the diameter of the gas nozzle outlet is smaller than the diameter of the slurry nozzle outlet, and the tail end of the slurry nozzle is connected to the slurry nozzle. The tails of the gas nozzles are fixedly connected by double sealing components. The gas nozzle is coaxial with the axis of the slurry nozzle. The slurry involved in this patent is limestone slurry.

The double sealing assembly includes a positioning ring sleeve, an inner cover and an outer cover. The positioning ring sleeve is sleeved on the outer wall of the gas nozzle, and the inner cover is sleeved on the outer circumferential surface of the positioning ring sleeve. The outer cover is threadedly connected to the outer wall of the slurry nozzle, and a sealing gasket is arranged inside the outer cover.

The slurry inlet pipe communicates obliquely with the gas nozzle. The inner circumferential surface of the slurry nozzle is a threaded surface, or the outer circumferential surface of the gas nozzle is a threaded surface. The slurry inlet pipe communicates with the gas nozzle at an oblique angle of 30°-60°. The installation angle of the slurry inlet pipe is consistent or consistent with the thread helix angle of the above-mentioned threaded surface.

The end of the gas nozzle is fixed to the slurry nozzle by three screws distributed in a circle of 120 degrees.

A sealing ring is arranged between the nut of the screw rod and the outer wall of the slurry nozzle.

The gas-in-liquid desulfurization atomizing nozzle is actually composed of a gas channel and a slurry channel. The gas channel is composed of a gas nozzle. Air-encapsulated desulfurization atomizing nozzle.

The gas (such as flue gas, water vapor or air, etc.) is connected to the gas nozzle after the air compressor increases the pressure, and the gas pressure is adjusted to reach the parameter value required by the process (the gas pressure is between 0.1 and 0.5 MPa). The slurry is sent into the slurry cavity of the slurry nozzle through the high-pressure pump through the slurry inlet pipe, and the slurry pressure can be adjusted by setting a regulating valve (according to the production process, the pressure can be between 0.2 and 0.6 MPa).

The beneficial effects of the utility model are:

1. As mentioned above, the pressurized pressure gas enters the gas nozzle with an inner cone at the end, is further compressed, and after being sprayed out from the gas nozzle, it merges with the slurry in the conical spray chamber of the slurry nozzle and forms a "liquid" "Air-encapsulated", under the action of high speed and pressure difference, the "gas-in-liquid" ruptures, the droplets are separated and broken, and finally sprayed out by the slurry nozzle to produce smaller particles (between 100 and 300um), which improves the efficient atomization of the slurry , to achieve the best flue gas desulfurization effect.

2. A thread structure is added to the inner peripheral surface of the slurry nozzle (of course, a thread structure can also be added to the outer peripheral surface of the gas nozzle). The installation angle of the slurry inlet pipe is consistent with or coincides with the helix angle of the above-mentioned thread structure, and the swirl flow is formed through the thread guide, which can avoid the possible flow dead zone of the slurry (limestone slurry) in the gas-in-liquid desulfurization atomization nozzle and cause the slurry Stagnation or blockage improves the stability of the product while reducing daily maintenance costs.

3. In addition, the oblique direction of the slurry inlet pipe is connected with the gas nozzle, and the installation angle is consistent or consistent with the helix angle of the above-mentioned thread structure, which further promotes the formation of a natural spiral swirl when the slurry enters the slurry cavity , to promote the formation of "gas in liquid".

4. The double seal assembly enables the nozzle to maintain a good seal under high-pressure conditions, ensuring that the liquid-in-gas desulfurization atomizing nozzle is in good working condition.

5. The end of the gas nozzle is fixed to the slurry nozzle by three (or two) screws distributed at a circumference of about 120 degrees. This structure can not only position the center of the gas nozzle, but also prevent the vibration of the gas nozzle, so that the utility model liquid Air-encapsulated desulfurization atomizing nozzles can work stably and normally under high-pressure conditions.

6. The utility model has positive and beneficial technical effects such as simple technical means and high atomization efficiency.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the utility model left view structure.

Detailed ways

The specific implementation manner of the present utility model will be further described in detail below, but the implementation manner of the present utility model is not limited thereto.

As shown in Figure 1. The gas-in-liquid desulfurization atomizing nozzle of the utility model comprises a slurry nozzle 1 with an inner cone at the end and a gas nozzle 2 with an inner cone at the end. The gas nozzle 2 is placed inside the slurry nozzle 1 and the axes of the two are coaxial. There is a gap between the outer wall of the gas nozzle 2 and the inner wall of the slurry nozzle 1 (the size of the gap is determined by the diameters of the slurry nozzle 1 and the gas nozzle 2), and the gap constitutes the slurry cavity 3 of the slurry nozzle 1. The outer wall of the slurry nozzle 1 is provided with a slurry inlet pipe 4 . The diameter of the gas nozzle 2 outlet should be smaller than the diameter of the slurry nozzle 1 outlet. The tail end 5-1 of the slurry nozzle 1 and the tail end 5 of the gas nozzle 2 are sealed and fixed by a double sealing assembly.

The inner tapered slurry nozzle 1 and the inner tapered gas nozzle 2 can further increase the pressure of gas and slurry. That is, the pressurized pressure gas enters the gas nozzle 2 with an inner cone at the end, is further compressed, and after being ejected from the gas nozzle 2, it merges with the slurry in the conical spray chamber 1-1 of the slurry nozzle 1 and forms a " Liquid-in-gas", under the action of high speed and pressure difference, the "liquid-in-gas" ruptures, the droplets are separated and broken, and finally sprayed out by the slurry nozzle to produce smaller particles to achieve a good atomization effect (atomized particles are generally 100~ between 300um).

As shown in Figure 1, the double seal assembly includes a sealing gasket 6, a positioning ring sleeve 7, an inner cover 8 and an outer cover 9, the positioning ring sleeve 7 is sealed on the outer wall of the gas nozzle 2, and the inner cover 8 sets It is arranged on the outer peripheral surface of the positioning ring 7, and the outer cover 9 is connected with the outer wall of the slurry nozzle 1 through threads. The sealing gasket 6 is placed in the outer cover 9 to enhance the sealing effect. The double sealing assembly constitutes an axial and radial sealing structure, so that the gas-in-liquid desulfurization atomizing nozzle of the present invention can maintain good sealing performance and work normally under high-pressure conditions.

A thread structure 3-1 can be added to the inner peripheral surface of the slurry nozzle 1 (certainly, a thread structure can also be added to the outer peripheral surface of the gas nozzle 2). The installation angle of the slurry inlet pipe 4 coincides with the helix angle of the above-mentioned thread structure 3-1, and the swirl flow is formed through the thread diversion, so as to avoid possible flow dead zones of the slurry (limestone slurry) in the gas-in-liquid desulfurization atomization nozzle. Serous stagnation or blockage. In addition, the slurry inlet pipe 4 communicates with the gas nozzle 2 at an oblique angle of 30°-60°, which further promotes the formation of a natural spiral flow when the slurry enters the slurry cavity 3 and promotes the formation of "gas in liquid".

as shown in picture 2. The end of the gas nozzle 2 is fixed to the slurry nozzle 1 by three (or two) screw rods 10 distributed in a circle of 120 degrees. Adopting this structure can not only position the center of the gas nozzle 2, but also prevent the gas nozzle 2 from vibrating, so that the gas-in-liquid desulfurization atomizing nozzle of the utility model can work stably and normally under high-pressure conditions. In order to achieve a better sealing effect, a sealing ring 11 is added between the nut of the screw rod 10 and the outer wall of the slurry nozzle 1, and rubber material is used. Of course, if the gas nozzle 2 is fixed in the slurry nozzle 1 and kept stable only by the double sealing assembly, the screw rod 10 does not need to be provided.

Just can realize this patent preferably as mentioned above.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (8)

1. gas-in-liquid formula desulfurization atomizer; It is characterized in that comprising that the end is that slurries nozzle, the end of inner conical is the gas nozzle of inner conical; Said gas nozzle places the inside of slurries nozzle; Have the gap between the inwall of the outer wall of said gas nozzle and slurries nozzle, this gap constitutes the slurries cavity, and the outer wall of said slurries nozzle is provided with slurries and gets into pipe; The diameter of said gas nozzle outlet is less than the diameter of slurries jet expansion, is fixedly connected through the dual-seal assembly between the tail end of said slurries nozzle and the afterbody of gas nozzle.

2. gas-in-liquid formula desulfurization atomizer according to claim 1; The inner circumferential surface that it is characterized in that said slurries nozzle is a thread surface; Perhaps the external peripheral surface of gas nozzle is a thread surface; Said slurries get into pipe with cut sth. askew to the gas nozzle installation that connects, its setting angle is consistent with the spiral angle of screw thread.

3. gas-in-liquid formula desulfurization atomizer according to claim 2 is characterized in that the axis coaxle of said gas nozzle and slurries nozzle.

4. gas-in-liquid formula desulfurization atomizer according to claim 3; It is characterized in that said dual-seal assembly comprises location ring set, interior capping and outer seal; Said location ring set sealing shroud is located on the outer wall of gas nozzle; Capping is sheathed on the external peripheral surface of location ring set in said, and said outer seal is connected with the outer wall thread of slurries nozzle.

5. gas-in-liquid formula desulfurization atomizer according to claim 4 is characterized in that said slurries get into pipe and cut sth. askew to connecting with gas nozzle with 30 °～60 °.

6. gas-in-liquid formula desulfurization atomizer according to claim 5 is characterized in that the end of said gas nozzle is fixed with the slurries nozzle with circumference 120 degree distributions through three screw rods.

7. gas-in-liquid formula desulfurization atomizer according to claim 6 is characterized in that being provided with sealing ring between nut and the slurries nozzle outer wall of said screw rod 10.

8. gas-in-liquid formula desulfurization atomizer according to claim 7 is characterized in that being provided with seal washer in the said outer seal.

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