A demisting device for a sulfide adsorption removal tower for cracking C5 production

Abstract

The utility model discloses a kind of demisting device for pyrolysis carbon five production sulfide adsorption removal tower, comprising outer ring frame, a plurality of first flow blocking triangular tube, a plurality of second flow blocking triangular tube, composite demisting net;The first flow blocking triangular tube, second flow blocking triangular tube are triangular pipe, hollow inside;Multiple first flow blocking triangular tube, second flow blocking triangular tube are parallel, array arrangement, be set in outer ring frame;Second flow blocking triangular tube is set first flow blocking triangular tube upper portion, staggered with it arrangement;Composite demisting net is set in pipe upper portion.The demisting device for pyrolysis carbon five production sulfide adsorption removal tower proposed in the utility model adopts the demisting thought of baffle flow passage+airflow collision coalescence+ultrasonic auxiliary+wire mesh cooperation, can realize the removal to different particle size droplets, especially applicable to relatively lower airflow speed pyrolysis carbon five adsorption removal tower.

Description

Technical Field

[0001] This utility model relates to the field of fuze technology, specifically a demisting device for an adsorption and removal tower for sulfides produced by cracking C5. Background Technology

[0002] Cracked C5 is a byproduct of ethylene production. It contains sulfides (such as mercaptans, carbon disulfide, thiophene, etc.) that can poison downstream catalysts and corrode equipment. It needs to be desulfurized to below 10 ppm.

[0003] During desulfurization via adsorption towers, the gaseous products may contain sulfur-containing droplets or desulfurizing agent mist. Failure to remove these droplets can lead to the escape of sulfides. Currently, commonly used baffle demisters utilize the inertial difference between gas and droplets for separation. When gas containing mist flows through the demister at a certain velocity, the gas rapidly changes direction, while the droplets, due to inertia, collide with and are captured by the corrugated plates. These captured droplets aggregate into larger droplets, and when gravity exceeds the combined force of the gas's upward force and the liquid's surface tension, they separate from the plates. However, baffle demisters do exhibit a significant decrease in separation efficiency for small-diameter droplets (especially <15 μm). Furthermore, they present challenges such as difficult cleaning. Summary of the Invention

[0004] The purpose of this invention is to provide a demister for an adsorption and removal tower used in the production of sulfides from pyrolysis C5, in order to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides a demister for an adsorption and removal tower used in the production of sulfides from pyrolysis C5, comprising an outer ring frame, a plurality of first flow-blocking triangular tubes, a plurality of second flow-blocking triangular tubes, and a composite demister mesh; the first and second flow-blocking triangular tubes are triangular tubes with hollow interiors; the plurality of first and second flow-blocking triangular tubes are arranged in parallel arrays within the outer ring frame; the second flow-blocking triangular tubes are located above the first flow-blocking triangular tubes and are arranged alternately with them; the composite demister mesh is located on the upper part of the tubes.

[0006] Preferably, the bottom surface of the first flow-blocking triangular tube is arranged horizontally and includes an upward-pointing tip; the top surface of the second flow-blocking triangular tube is arranged parallel to the bottom surface of the first flow-blocking triangular tube and includes a downward-pointing tip; the sides of the first flow-blocking triangular tube and the second flow-blocking triangular tube are parallel, forming a V-shaped flow channel between their sides.

[0007] Preferably, the composite demisting mesh includes a bent plate section and a wire mesh section. The bent plate section is bent in the center with the tip facing upward, and both sides are fixed to the outer ring frame. Multiple bent plate sections are arranged in parallel arrays. The bottoms of adjacent bent plate sections are connected by the wire mesh section.

[0008] Preferably, the bent plate portion is arranged in parallel and staggered with the second flow-blocking triangular tube, and the bent plate portion covers the gap between two adjacent second flow-blocking triangular tubes.

[0009] Preferably, the top surface of the second flow-blocking triangular tube is tilted to one side or from the center to both sides.

[0010] Preferably, an ultrasonic vibration rod is installed inside the second flow-blocking triangular tube.

[0011] Preferably, a first baffle triangular tube and a second baffle triangular tube constitute a unit layer, and the demisting device shown includes multiple vertically stacked unit layers.

[0012] The demister proposed in this invention for the adsorption and removal tower of sulfides in the production of pyrolysis C5 adopts a demisting approach of baffled flow channel + airflow collision and coalescence + ultrasonic assistance + wire mesh collaboration. It can remove droplets of different sizes, and is especially suitable for pyrolysis C5 adsorption and removal towers with relatively low airflow velocities. Moreover, in addition to promoting the resonance, collision and coalescence of small droplets through ultrasonic waves, it can also reduce the time that droplets stay on the flow channel plate and wire mesh, thereby reducing the risk of clogging of the demister. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the overall scheme of this utility model.

[0014] Figure 2 This is a partially enlarged cross-sectional view of the present invention.

[0015] Figure 3 This is a cross-sectional schematic diagram of an embodiment of the present invention that includes an ultrasonic vibration rod.

[0016] Figure 4 This is a partial cross-sectional schematic diagram of another embodiment of the present invention. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] As attached Figure 1-4 As shown, the demister device for the adsorption and removal tower of sulfide in the cracking C5 production of this utility model includes an outer ring frame 1, a plurality of first flow-blocking triangular tubes 2, a plurality of second flow-blocking triangular tubes 3, and a composite demister mesh 4.

[0019] As attached Figure 1 , 2As shown, the first flow-blocking triangular tube 2 and the second flow-blocking triangular tube 3 are isosceles triangular tubes made of stainless steel and hollow inside. Multiple first flow-blocking triangular tubes 2 and second flow-blocking triangular tubes 3 are arranged in parallel arrays within the outer ring frame 1. The outer ring frame 1 is located inside the adsorption-removal tower.

[0020] The first flow-blocking triangular tube 2 has a horizontally arranged bottom surface and includes an upward-pointing tip. The top surface of the second flow-blocking triangular tube 3 is arranged parallel to the bottom surface of the first flow-blocking triangular tube 2 and includes a downward-pointing tip. The second flow-blocking triangular tube 3 is located above the first flow-blocking triangular tube 2 and is arranged alternately with it. The sides of the first flow-blocking triangular tube 2 and the second flow-blocking triangular tube 3 are parallel, forming a V-shaped flow channel between their sides.

[0021] The composite demisting mesh 4 includes a bent plate section 41 and a wire mesh section 42. The bent plate section 41 is bent in the center with the tip pointing upwards, and both sides are fixed to the outer ring frame 1. Multiple bent plate sections 41 are arranged in parallel arrays. The bottoms of adjacent bent plate sections 41 are connected by the wire mesh section 2 to form a wire mesh section 42-bent plate section 41-wire mesh section 42 structure.

[0022] The bent plate section 41 is arranged in parallel and staggered with the second flow-blocking triangular tube 3. The bent plate section 41 covers the gap between two adjacent second flow-blocking triangular tubes 3.

[0023] As attached Figure 3 As shown, the airflow flows into the V-shaped flow channel through the gap between the first baffle triangular tubes 2. After being split in the V-shaped flow channel, it flows upward. During the upward process, it collides with the first baffle triangular tube 2. The side of the second baffle triangular tube plays a role in demisting. After the airflow flows out of the V-shaped flow channel, it will collide with the airflow flowing out of the adjacent V-shaped flow channel. After the collision, the droplets will coalesce due to surface tension, causing small liquids to form large-diameter droplets. Then, they rise and are removed by the composite demisting net 4.

[0024] The bending plate section 41 mainly serves two functions. On the one hand, the bending plate section 41 can provide support for the wire mesh section 41 to prevent the wire mesh section from sagging. Moreover, if the wire mesh section becomes clogged, the clogged wire mesh section can be removed and replaced. On the other hand, the bending plate section 41 can also act as a deflector. After the airflow reaches the bending plate section 41, it collides with the bending plate section 41 and flows downward before flowing out from the wire mesh section 42, which can also achieve a defogging effect.

[0025] Furthermore, to prevent droplets from accumulating on the top surface of the second flow-blocking triangular tube, the top surface of the second flow-blocking triangular tube is arranged at an angle, either to one side or from the center to both sides.

[0026] Furthermore, an ultrasonic vibrating rod 5 is installed inside the second flow-blocking triangular tube 3. Ultrasonic waves can promote the resonance, collision, and coalescence of small droplets, and the vibration reduces the time droplets spend on the flow channel plate and wire mesh, thus reducing the risk of clogging the demisting device. Moreover, the ultrasonic vibrating rod 5, located inside the second flow-blocking triangular tube 3, avoids corrosion from sulfur-containing gases.

[0027] Furthermore, to enhance the effect, as shown in the attached document... Figure 4 As shown, multiple layers can be stacked, that is, a first baffle triangular tube 2 and a second baffle triangular tube 3 constitute a unit layer D, and the defogging effect is improved by stacking multiple unit layers.

[0028] It should be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A demisting device for a sulfide adsorption removal column for cleavage of C5 to produce sulfur compounds, characterized by, It includes an outer ring frame, several first flow-blocking triangular tubes, several second flow-blocking triangular tubes, and a composite demisting mesh; the first and second flow-blocking triangular tubes are triangular tubes with hollow interiors; multiple first and second flow-blocking triangular tubes are arranged in parallel arrays and installed inside the outer ring frame; the second flow-blocking triangular tubes are installed on the upper part of the first flow-blocking triangular tubes and are arranged alternately with them; The composite demister mesh is installed at the top of the pipe.

2. The demisting device according to claim 1, characterized in that, The bottom surface of the first flow-blocking triangular tube is arranged horizontally and includes an upward-pointing tip. The top surface of the second flow-blocking triangular tube is arranged parallel to the bottom surface of the first flow-blocking triangular tube and includes a downward-pointing tip. The sides of the first and second flow-blocking triangular tubes are parallel, forming a V-shaped flow channel between their sides.

3. The demisting device according to claim 1, characterized in that, The composite defogging mesh includes a bent plate section and a wire mesh section. The bent plate section is bent in the center with the tip pointing upwards, and both sides are fixed to the outer ring frame. Multiple bent plate sections are arranged in parallel arrays. The bottoms of adjacent bent plate sections are connected by the wire mesh section.

4. The demisting device according to claim 3, characterized in that, The bent plate section is arranged in parallel and staggered with the second flow-blocking triangular tube, and the bent plate section covers the gap between two adjacent second flow-blocking triangular tubes.

5. The demisting device according to claim 4, characterized in that, The top of the second flow-blocking triangular tube is tilted to one side or from the center to both sides.

6. The demisting device according to claim 1, characterized in that, An ultrasonic vibration rod is installed inside the second flow-blocking triangular tube.

7. The demisting device according to claim 1, characterized in that, A first baffle triangular tube and a second baffle triangular tube constitute a unit layer. The demisting device shown includes multiple vertically stacked unit layers.

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