CN212548910U

CN212548910U - Corrosion-resistant acid mist purifying tower

Info

Publication number: CN212548910U
Application number: CN202020807931.3U
Authority: CN
Inventors: 顾益
Original assignee: Taicang Yisheng Chemical Anticorrosion Equipment Co ltd
Current assignee: Taicang Yisheng Chemical Anticorrosion Equipment Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-02-19
Anticipated expiration: 2030-05-15

Abstract

The utility model belongs to the technical field of chemical industry equipment, more specifically say, relate to a corrosion-resistant acid mist purifying tower. It comprises a cyclone spray tower and a filler absorption tower; the shell of the cyclone spray tower consists of a conical section, a cylindrical section, a neck section and a dehumidification section which are sequentially connected from bottom to top; a first air inlet pipe is arranged at the upper end of the cylindrical section along the tangential direction of the cylindrical surface; a spray pipe is vertically arranged on the central axis of the conical section and the cylindrical section, and a group of radial atomizing nozzles are arranged along the outer wall of the spray pipe; the bottom end of the conical section is provided with a first liquid discharge pipe; the top end of the dehumidification section is provided with a first exhaust pipe; the packing absorption tower is provided with a packing layer in the middle inside a tower shell; a second air inlet pipe is arranged below the packing layer; a spraying frame is arranged above the packing layer; the first exhaust pipe and the second air inlet pipe are connected in series with a booster fan. The utility model discloses have very high purification efficiency and great handling capacity to acid mist, still have better stability and reliability simultaneously, the comprehensive properties is good.

Description

Corrosion-resistant acid mist purifying tower

Technical Field

The utility model belongs to the technical field of chemical industry equipment, more specifically say, relate to a corrosion-resistant acid mist purifying tower.

Background

In many stages of chemical production, acid waste gases are generated, and the acid waste gases carry water vapor and exist in the form of acid mist. In order to prevent the acid mist from leaking and polluting the environment, the acid mist needs to be subjected to advanced treatment. At present, the common treatment mode is to introduce acid mist into a spray tower from bottom to top, spray absorption liquid from top to bottom in the spray tower, and realize absorption through up-down convection of gas-liquid phases. However, this method has a problem of low absorption efficiency because the gas-liquid contact time is short, the flow direction of the gas-liquid two phases is relatively single, and the convection motion is relatively gentle. In order to achieve the purpose of standard discharge, the absorption tower is often large in size and even needs to be connected in series in multiple stages, so that higher use cost is caused.

Disclosure of Invention

To the not enough of prior art existence, the utility model provides a corrosion-resistant acid mist purifying tower. The acid mist purification tower has high absorption efficiency on acid mist or acid waste gas, and the main body structure of the acid mist purification tower is preferably made of polypropylene materials, so that the acid mist purification tower has high corrosion resistance.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a corrosion-resistant acid mist purification tower comprises a cyclone spray tower and a filler absorption tower; the shell of the cyclone spray tower consists of a conical section, a cylindrical section, a neck section and a dehumidification section which are sequentially connected from bottom to top; the neck section is cylindrical and is arranged coaxially with the cylindrical section; a first air inlet pipe is arranged at the upper end of the cylindrical section along the tangential direction of the cylindrical surface, and the section of the first air inlet pipe is square; a spray pipe is vertically arranged on the central axis of the conical section and the cylindrical section, and a group of radial atomizing nozzles are arranged along the outer wall of the spray pipe; the bottom end of the conical section is provided with a first liquid discharge pipe; the top end of the dehumidification section is provided with a first exhaust pipe; the first air inlet pipe is connected with an air inlet fan through a pipeline; the packing absorption tower comprises a tower shell, a second exhaust pipe is arranged at the top of the tower shell, and a second liquid discharge pipe is arranged at the bottom of the tower shell; a packing layer is arranged in the middle of the tower shell; a second air inlet pipe is arranged below the packing layer; a spraying frame is arranged above the packing layer; the first exhaust pipe and the second air inlet pipe are connected in series with a booster fan.

When the utility model is used, the absorption liquid is introduced into the spray pipe and is radially sprayed out from each atomizing nozzle from the center to the periphery, and is collected and discharged from the first liquid discharge pipe after absorbing acid mist; the acid mist to be purified is introduced into the cyclone spray tower from a first air inlet pipe by an air inlet fan, spirally moves from top to bottom in the tower along the tower wall, spirally moves to a neck section from bottom to top along the central axes of the conical section and the cylindrical section after moving to the bottom of the conical section, and flows through the dehumidification section to remove carried water vapor and then flows out of the first exhaust pipe; the gas enters the filler absorption tower after being pressurized by the booster fan, flows through the filler layer from bottom to top, is deeply purified and is finally discharged from the second exhaust pipe; and the absorption liquid of the filler absorption tower is sprayed out from the spray frame, attached to the surface of the filler, fully exchanged with the gas, flows into the bottom of the tower, and is collected and discharged through a second liquid discharge pipe. In the utility model, the gas in the whirlwind spray tower is in inner and outer double-layer spiral motion, the flow channel is long, the flow speed is fast, and the gas-liquid relative motion is violent; the outer layer spiral air flow makes vertical interleaving movement with the sprayed absorption liquid in the space on one hand, and makes shearing movement with the absorption liquid film attached to the tower wall on the other hand; the inner layer spiral airflow is always contacted with the freshest absorption liquid in the process of moving upwards and flowing to the neck section; for the reasons in many aspects, the cyclone spray tower has very high purification efficiency, and the absorption efficiency of the traditional large-volume absorption tower can be achieved with smaller volume. In addition, because the air flow in the cyclone spray tower moves complexly and violently, under some extreme working conditions, a small amount of air flow can flow out from the neck section without complete double-layer spiral movement, and therefore the stability and the purification rate of the subsequent filler absorption tower can be improved by matching the filler absorption tower. It can be seen that, the utility model designs a whirlwind formula spray column and traditional filler absorption tower cooperation, fully combined whirlwind formula spray column efficient big absorbed dose and the reliable and stable advantage of filler absorption tower to reach better comprehensive purification effect.

The utility model discloses a further preferred is that, the dehumidification section is the little spindle shape in middle big upper and lower both ends, and inside is equipped with first folded plate formula defroster, and first folded plate formula defroster comprises a set of folded plate of equidistant range.

The utility model has the further preferable proposal that the length-diameter ratio of the cylindrical section is 2: 1; the diameter ratio of the upper circle to the lower circle of the conical section is 5:1, and the height of the conical section is the same as that of the cylindrical section; the diameter ratio of the cylindrical section to the neck section is 5: 2; the ratio of the height of the cylindrical section to the height of the cross section of the first inlet pipe is 5: 1. Through the optimization of the structural proportion, the double-layer spiral motion of the air flow can be more fully and stably.

The utility model discloses further preferred scheme is, the last minimum atomizer of position of shower and circular cone section count 2/5 equal height from bottom to top.

The utility model discloses a further preferred scheme is, the entry of shower is drawn forth from the lateral wall of cylinder section.

The utility model discloses a further preferred is, sprays the frame top and still is equipped with the second folded plate formula defroster, and the second folded plate formula defroster comprises a set of folded plate of equidistant range.

The utility model discloses a further preferred scheme is, the filler that uses in the filler layer is the cascade ring filler. The step ring packing is an improvement of the pall ring, and the comprehensive performance of the step ring packing is superior to that of the pall ring. Compared to the pall ring, the step ring is reduced in height by half and a tapered flange is added at one end. Because the height-diameter ratio is reduced, the average path of the gas around the outer wall of the packing is greatly shortened, and the resistance of the gas passing through the packing layer is reduced. The conical flanging can increase the mechanical strength, so that the contact between the fillers is mainly point contact, the gaps between the fillers are increased, the fillers can also become convergence and dispersion points for liquid to flow along the surfaces of the fillers, the surface updating of a liquid film can be promoted, and the improvement of the mass transfer efficiency is facilitated.

The utility model has the further preferable proposal that the atomizing nozzle comprises a tube seat, a nozzle cover, a conical baffle and a conical flow guide block; the pipe seat is communicated with the spray pipe; one end of the nozzle cover is connected with the tube seat through thread fit, and the other end of the nozzle cover is a nozzle; the connection part of the tube seat and the nozzle cover is clamped with a conical baffle; the conical baffle is integrally in a disc shape, the edge of the conical baffle is a circular plate edge, the center of the conical baffle is provided with a cone protruding towards the tube seat, and a group of through holes are formed in the joint of the plate edge and the cone; a conical flow guide block is embedded in a cavity formed by enclosing the conical baffle and the sprayer cover; the surface of the conical diversion block is provided with a spiral diversion trench; the pipe seat is communicated with the nozzle through a through hole and a spiral diversion trench. The absorption liquid flows through the pipe seat, the through hole and the spiral diversion trench in sequence and is sprayed out from the nozzle, so that a better atomization effect is achieved.

Has the advantages that: compared with the prior art, the utility model provides a corrosion-resistant acid mist purifying tower has very high purification efficiency and great handling capacity to the acid mist, still has better stability and reliability simultaneously, and the comprehensive properties is good.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the internal structure of the cyclone spray tower of the present invention;

FIG. 3 is a schematic view of the internal structure of the packed absorption tower of the present invention;

FIG. 4 is a schematic view of the first air inlet pipe and the cylindrical section of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 2;

FIG. 6 is a schematic view showing the internal structure of an atomizing head in example 2;

FIG. 7 is a left side view of the conical baffle plate of embodiment 2;

fig. 8 is a front view of the conical deflector block of embodiment 2.

In the figure, a cyclone spray tower 1, a filler absorption tower 2, a conical section 11, a cylindrical section 12, a neck section 13, a dehumidification section 14, a first air inlet pipe 15, a spray pipe 16, an atomizing spray head 17, an air inlet fan 18, a first liquid discharge pipe 111, a first air discharge pipe 141, a tower shell 21, a second air discharge pipe 211, a second liquid discharge pipe 212, a filler layer 22, a second air inlet pipe 23, a spray frame 24, a booster fan 25, a first folded plate type demister 142, a second folded plate type demister 26, a pipe seat 171, a spray head cover 172, a conical baffle 173, a conical guide block 174, a plate edge 1731, a cone 1732, a through hole 1733 and a spiral guide groove 1741.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Example 1

A corrosion-resistant acid mist purification tower is shown in figures 1 to 5 and comprises a cyclone spray tower 1 and a filler absorption tower 2; the shell of the cyclone spray tower 1 is composed of a conical section 11, a cylindrical section 12, a neck section 13 and a dehumidification section 14 which are connected in sequence from bottom to top; the neck section 13 is cylindrical and is arranged coaxially with the cylindrical section 12; a first air inlet pipe 15 is arranged at the upper end of the cylindrical section 12 along the tangential direction of the cylindrical surface, and the section of the first air inlet pipe 15 is square; a spray pipe 16 is vertically arranged on the central axis of the conical section 11 and the cylindrical section 12, and a group of radial atomizing nozzles 17 are arranged along the outer wall of the spray pipe 16; the bottom end of the conical section 11 is provided with a first liquid discharge pipe 111; the top end of the dehumidification section 14 is provided with a first exhaust pipe 141; the first air inlet pipe 15 is connected with an air inlet fan 18 through a pipeline; the packing absorption tower 2 comprises a tower shell 21, a second exhaust pipe 211 is arranged at the top of the tower shell 21, and a second liquid discharge pipe 212 is arranged at the bottom of the tower shell 21; a packing layer 22 is arranged in the middle of the tower shell 21; a second air inlet pipe 23 is arranged below the packing layer 22; a spray rack 24 is arranged above the packing layer 22; the booster fan 25 is connected in series between the first exhaust pipe 141 and the second intake pipe 23.

In this embodiment, the dehumidifying section 14 is in a spindle shape with a large middle, and upper and lower ends, and the first folding plate type demister 142 is disposed inside the dehumidifying section, and the first folding plate type demister 142 is composed of a set of folding plates arranged at equal intervals.

In this embodiment, a second folded plate type demister 26 is further disposed above the spraying frame 24, and the second folded plate type demister 26 is composed of a set of folded plates arranged at equal intervals.

Example 2

A corrosion-resistant acid mist purification tower is shown in figures 1 to 8 and comprises a cyclone spray tower 1 and a filler absorption tower 2; the shell of the cyclone spray tower 1 is composed of a conical section 11, a cylindrical section 12, a neck section 13 and a dehumidification section 14 which are connected in sequence from bottom to top; the neck section 13 is cylindrical and is arranged coaxially with the cylindrical section 12; a first air inlet pipe 15 is arranged at the upper end of the cylindrical section 12 along the tangential direction of the cylindrical surface, and the section of the first air inlet pipe 15 is square; a spray pipe 16 is vertically arranged on the central axis of the conical section 11 and the cylindrical section 12, and a group of radial atomizing nozzles 17 are arranged along the outer wall of the spray pipe 16; the bottom end of the conical section 11 is provided with a first liquid discharge pipe 111; the top end of the dehumidification section 14 is provided with a first exhaust pipe 141; the first air inlet pipe 15 is connected with an air inlet fan 18 through a pipeline; the packing absorption tower 2 comprises a tower shell 21, a second exhaust pipe 211 is arranged at the top of the tower shell 21, and a second liquid discharge pipe 212 is arranged at the bottom of the tower shell 21; a packing layer 22 is arranged in the middle of the tower shell 21; a second air inlet pipe 23 is arranged below the packing layer 22; a spray rack 24 is arranged above the packing layer 22; the booster fan 25 is connected in series between the first exhaust pipe 141 and the second intake pipe 23.

In this embodiment, the aspect ratio of cylindrical section 12 is 2: 1; the diameter ratio of the upper circle to the lower circle of the conical section 11 is 5:1, and the height of the conical section 11 is the same as that of the cylindrical section 12; the diameter ratio of the cylindrical section 12 to the neck section 13 is 5: 2; the ratio of the height of the cylindrical section 12 to the cross-sectional height of the first inlet pipe 15 is 5: 1.

In this embodiment, the lowest atomizer 17 of the shower pipe 16 is equal to 2/5 from bottom to top in height with respect to the conical section 11.

In this embodiment, the inlets of the showers 16 exit from the side walls of the cylindrical section 12.

In this embodiment, the packing used in packing layer 22 is a stepped ring packing.

In this embodiment, the atomizer 17 includes a tube holder 171, a cap 172, a conical baffle 173, and a conical deflector 174; the tube seat 171 communicates with the shower tube 16; one end of the nozzle cover 172 is connected to the tube seat 171 by screw-fitting, and the other end is a nozzle; a conical baffle 173 is clamped at the joint of the tube seat 171 and the nozzle cover 172; the conical baffle 173 is integrally in a shape of a circular disc, the edge of the conical baffle is a circular plate edge 1731, the center of the conical baffle is a cone 1732 protruding towards the tube seat 171, and a group of through holes 1733 are formed at the joint of the plate edge 1731 and the cone 1732; a conical flow guide block 174 is embedded in a cavity formed by enclosing the conical baffle 173 and the spray head cover 172; the surface of the conical guide block 174 is provided with a spiral guide groove 1741; the nozzle holder 171 is connected to the nozzle through a through hole 1733 and a spiral guide groove 1741.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a corrosion-resistant acid mist purifying column which characterized in that: comprises a cyclone spray tower (1) and a filler absorption tower (2); the shell of the cyclone spray tower (1) is composed of a conical section (11), a cylindrical section (12), a neck section (13) and a dehumidification section (14) which are connected in sequence from bottom to top; the neck section (13) is cylindrical and is arranged coaxially with the cylindrical section (12); a first air inlet pipe (15) is arranged at the upper end of the cylindrical section (12) along the tangential direction of the cylindrical surface, and the section of the first air inlet pipe (15) is square; a spray pipe (16) is vertically arranged at the central axis of the conical section (11) and the cylindrical section (12), and a group of radial atomizing nozzles (17) are arranged along the outer wall of the spray pipe (16); a first liquid discharge pipe (111) is arranged at the bottom end of the conical section (11); a first exhaust pipe (141) is arranged at the top end of the dehumidification section (14); the first air inlet pipe (15) is connected with an air inlet fan (18) through a pipeline; the packing absorption tower (2) comprises a tower shell (21), a second exhaust pipe (211) is arranged at the top of the tower shell (21), and a second liquid discharge pipe (212) is arranged at the bottom of the tower shell (21); a packing layer (22) is arranged in the middle of the tower shell (21); a second air inlet pipe (23) is arranged below the packing layer (22); a spraying frame (24) is arranged above the packing layer (22); and a booster fan (25) is connected in series between the first exhaust pipe (141) and the second air inlet pipe (23).

2. The corrosion-resistant acid mist purification tower of claim 1, wherein: the dehumidification section (14) is in the shape of a fusiform with a large middle and small upper and lower ends, and a first folded plate type demister (142) is arranged inside the dehumidification section, wherein the first folded plate type demister (142) is composed of a group of folded plates which are arranged at equal intervals.

3. The corrosion-resistant acid mist purification tower of claim 1, wherein: the length-diameter ratio of the cylindrical section (12) is 2: 1; the diameter ratio of an upper circle to a lower circle of the conical section (11) is 5:1, and the heights of the conical section (11) and the cylindrical section (12) are the same; the diameter ratio of the cylindrical section (12) to the neck section (13) is 5: 2; the ratio of the height of the cylindrical section (12) to the cross-sectional height of the first inlet pipe (15) is 5: 1.

4. The corrosion-resistant acid mist purification tower of claim 1, wherein: the lowest atomization nozzle (17) on the spray pipe (16) is equal to the conical section (11) at 2/5 from bottom to top in height.

5. The corrosion-resistant acid mist purification tower of claim 1, wherein: the inlets of the shower pipes (16) lead out from the side wall of the cylindrical section (12).

6. The corrosion-resistant acid mist purification tower of claim 1, wherein: and a second folded plate type demister (26) is also arranged above the spraying frame (24), and the second folded plate type demister (26) consists of a group of folded plates which are arranged at equal intervals.

7. The corrosion-resistant acid mist purification tower of claim 1, wherein: the packing used in the packing layer (22) is a step ring packing.

8. The corrosion-resistant acid mist purification tower of any one of claims 1 to 7, wherein: the atomizing spray head (17) comprises a pipe seat (171), a spray head cover (172), a conical baffle (173) and a conical guide block (174); the pipe seat (171) is communicated with the spray pipe (16); one end of the spray head cover (172) is connected with the pipe seat (171) through thread fit, and the other end is a spray nozzle; the conical baffle (173) is clamped at the joint of the tube seat (171) and the spray head cover (172); the conical baffle (173) is integrally in a disc shape, the edge of the conical baffle is a circular plate edge (1731), the center of the conical baffle is provided with a cone (1732) protruding towards the tube seat (171), and a group of through holes (1733) are formed in the joint of the plate edge (1731) and the cone (1732); the conical guide block (174) is embedded in a cavity formed by enclosing the conical baffle (173) and the spray head cover (172); the surface of the conical guide block (174) is provided with a spiral guide groove (1741); the pipe seat (171) is communicated with the nozzle through the through hole (1733) and the spiral diversion trench (1741).