CN210845835U - Horizontal bubbling catalytic absorption device - Google Patents
Horizontal bubbling catalytic absorption device Download PDFInfo
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- CN210845835U CN210845835U CN201921592685.8U CN201921592685U CN210845835U CN 210845835 U CN210845835 U CN 210845835U CN 201921592685 U CN201921592685 U CN 201921592685U CN 210845835 U CN210845835 U CN 210845835U
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Abstract
The utility model discloses a horizontal tympanic bulla catalytic absorption device belongs to tail gas absorption equipment technical field, and its technical essential includes horizontal tympanic bulla catalytic absorption device body, horizontal tympanic bulla catalytic absorption device body includes that inside cavity and packing have the storage tank of a large amount of absorption liquid to and be located the ethylene oxide gas distributor body of storage tank, be equipped with intake pipe and blast pipe on the ethylene oxide gas distributor body, intake pipe one end intercommunication is provided with the breather pipe, breather pipe both ends and at least two exhaust pipes are linked together, and the tip of blast pipe seals the setting, a large amount of exhaust holes have been seted up on the blast pipe, the exhaust hole only sets up in the blast pipe one side of keeping away from the liquid level, the exhaust hole is all located under the liquid level of absorption liquid. The utility model discloses ethylene oxide is via exhaust hole discharge back, is covered with distributor below absorption liquid earlier, has prolonged gas-liquid contact time, has improved the absorption efficiency of absorption liquid to ethylene oxide.
Description
Technical Field
The utility model belongs to the technical field of tail gas absorption equipment, more specifically say, it relates to a horizontal tympanic bulla catalytic absorption device.
Background
Ethylene Oxide (EO) is an organic compound of formula C2H4O, a toxic carcinogen, and flammable and explosive, has been used to make fungicides. When ethylene oxide is used in the production, in the case of the nitrogen pressurized feed method, the ethylene oxide metering tank and the ethylene oxide storage tank of the plant must be vented, the main components of the vent gas are nitrogen and a small amount of ethylene oxide, and the vent gas has a certain pressure and a total flow rate of 300 m3To treat the exhaust gas from which ethylene oxide is to be cleaned, a catalytic bubbling absorption apparatus is usually added to the entire exhaust gas treatment process, and water is used as an absorption liquid to promote the absorption of ethylene oxide by adding a catalyst, an acid or a base to the water.
The catalytic bubbling absorption device commonly used in the market at present is divided into a horizontal type catalytic bubbling absorption device and a vertical type catalytic bubbling absorption device, the vertical type catalytic bubbling absorption device is widely applied to waste gas treatment, but a spray tower is additionally arranged in the general vertical type catalytic bubbling absorption device, the working principle of the spray tower is that gas and liquid move in opposite directions and contact with each other at a gas-liquid interface, a liquid circulating pump is required to be arranged, the absorption liquid is sprayed on a filler, and the liquid absorbs the waste gas (such as ethylene oxide) in the filler. Although the absorption method has obvious effect, the absorption method is not suitable for vertical type under certain conditions, and has the following disadvantages of large occupied area, plane stress limitation, additional arrangement of a liquid circulating pump, high electricity consumption, high cost and the like.
In order to improve the bubble absorption efficiency of the existing catalytic bubble absorption device, a distributor is often additionally arranged in the catalytic bubble absorption device. The distributor mainly comprises an air inlet pipe, a vent pipe and an exhaust pipe row, wherein a large number of exhaust holes are formed in the exhaust pipe 4, and the exhaust holes are uniformly distributed on the circumferential side wall of the exhaust pipe. The operator can install the distributor in the catalytic bubbling absorption device, and fill the absorption liquid in the catalytic bubbling absorption device to achieve the effect of absorbing the exhaust gas. Meanwhile, the air inlet end of the vent pipe is communicated with the conveying pipe, the conveying pipe can discharge waste gas (such as ethylene oxide) which is not utilized in a workshop into the vent pipe, and then the waste gas is discharged into the catalytic bubbling absorption device through the exhaust hole of the exhaust pipe and is absorbed by the absorption liquid after being contacted with the absorption liquid, and at the moment, the aim of absorbing the waste gas (such as ethylene oxide) can be achieved.
The exhaust holes are formed in the circumferential side wall of the exhaust pipe, the liquid pressure received by the exhaust hole located on one side, close to the air inlet pipe, of the exhaust pipe is low, the liquid level pressure received by the exhaust hole located on one side, far away from the air inlet pipe, of the exhaust pipe is high, and a large amount of ethylene oxide can be discharged from one side, low in liquid pressure, of the exhaust pipe. However, when the liquid level of the absorption liquid is too low, the distributor directly discharges the ethylene oxide into the cavity of the storage tank instead of under the liquid level, and at the moment, the ethylene oxide is only contacted with the absorption liquid at a gas-liquid interface, so that the contact area is small, and the absorption efficiency is poor. If the liquid level of the absorption liquid is too high, the ethylene oxide is still discharged from the side with the lower liquid level pressure, and the discharge amount of the vent hole below the liquid discharge pipe is small or even zero, and when the content of the absorption liquid above the vent pipe absorbing the ethylene oxide reaches saturation, part of the ethylene oxide may directly overflow into the cavity of the storage tank, and further the absorption efficiency of the absorption liquid on the ethylene oxide may be affected, so a new technical scheme needs to be provided to solve the above problems.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a horizontal tympanic bulla catalytic absorption device, ethylene oxide are discharged via the exhaust hole after, are covered with distributor below absorption liquid earlier, have prolonged gas-liquid contact time, have improved the absorption efficiency of absorption liquid to ethylene oxide.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a horizontal tympanic bulla catalytic absorption device, includes horizontal tympanic bulla catalytic absorption device body, horizontal tympanic bulla catalytic absorption device body includes that inside cavity and packing have a large amount of storage tanks of absorption liquid to and be located the ethylene oxide gas distributor body of storage tank, be equipped with intake pipe and blast pipe on the ethylene oxide gas distributor body, intake pipe one end intercommunication is provided with the breather pipe, breather pipe both ends and at least two blast pipes are linked together, and the tip of blast pipe seals the setting, seted up a large amount of exhaust holes on the blast pipe, the exhaust hole is only seted up in the blast pipe and is kept away from one side of liquid level, the exhaust hole is whole to be located under the liquid.
Through adopting above-mentioned technical scheme, the ethylene oxide that is not used in the workshop to accomplish is in the effect of air-extracting pump, and the accessible intake pipe enters into the breather pipe in, gets into in the exhaust pipe respectively through the breather pipe tip again. At this moment, under the effect of atmospheric pressure, can make ethylene oxide relatively even distribute whole blast pipe in, from this when the operator uses above-mentioned distributor in the later stage, the distributor sprays ethylene oxide to the absorption liquid, and above-mentioned ethylene oxide is discharged via the exhaust hole, and earlier the below absorption liquid of distributor is distributed to full, has prolonged the gas-liquid contact time, has improved the absorption efficiency of absorption liquid to ethylene oxide.
Furthermore, the intake pipe is communicated with a plurality of communicating pipes, one end of each communicating pipe is communicated with the intake pipe, and the other end of each communicating pipe is communicated with the free end of the exhaust pipe.
By adopting the technical scheme, the unused ethylene oxide in the workshop enters the vent pipe through the air inlet pipe under the action of the air suction pump, and then enters the central part of the exhaust pipe through the end part of the vent pipe; meanwhile, the ethylene oxide in the air inlet pipe can directly enter the end part of the exhaust pipe from the communicating pipe, at the moment, under the action of air pressure, the ethylene oxide can be uniformly distributed in the whole exhaust pipe, the discharged ethylene oxide in the exhaust pipe can be uniformly contacted with the absorption liquid, the phenomenon that the absorption amount of the local absorption liquid is too much and the absorption amount of the rest absorption liquid is too little is reduced, the large-area contact of the ethylene oxide and the absorption liquid is increased, and the absorption efficiency of the ethylene oxide is improved.
Further, the exhaust holes are obliquely arranged and are provided with a plurality of rows.
By adopting the technical scheme, the liquid level disturbance of the absorption liquid around the exhaust hole can be increased, the turbulent flow of the absorption liquid is promoted, the dispersion of the ethylene oxide in the absorption liquid can be effectively increased, and the absorption rate of the ethylene oxide is accelerated.
Furthermore, the absolute values of the inclination angles of the two adjacent rows of exhaust holes are the same, and the inner walls of the two adjacent rows of exhaust holes are rotationally symmetrical.
By adopting the technical scheme, when the ethylene oxide gas distributor body is immersed in the absorption liquid, the liquid level disturbance of the absorption liquid around the exhaust holes can be increased, the circulating flow of the absorption liquid is promoted, the absorption liquid around the exhaust holes circulates and is updated constantly, the dispersion of ethylene oxide in the absorption liquid is increased, the effect similar to stirring is achieved, and the absorption rate of ethylene oxide is further accelerated.
Furthermore, a guide angle is arranged at the joint between the inner wall and the outer wall of the exhaust hole, and the guide angle is in a flaring shape along the radial direction outwards.
Preferably, the inner diameter of the exhaust hole is gradually increased from the inner part close to the exhaust pipe to the outer part.
By adopting the technical scheme, the diameter of the outlet of the exhaust hole is enlarged, the contact area between ethylene oxide and waste gas is increased, and the absorption rate of ethylene oxide is accelerated.
Furthermore, the air inlet pipe, the exhaust pipe and the vent pipe are fixedly connected by welding.
By adopting the technical scheme, the air tightness and the water tightness of the pipeline joint are ensured, and the air leakage or water leakage at the pipeline joint is prevented from affecting the exhaust function of the distributor.
Furthermore, the inner wall surface and the outer wall surface of the air inlet pipe, the air vent pipe and the air vent pipe are coated with anticorrosive coatings.
By adopting the technical scheme, the anticorrosive coating can effectively prevent the corrosion of catalysts, acid, alkali and the like in the absorption liquid to the pipeline.
Furthermore, the air inlet end of the air inlet pipe is arranged outside the storage tank, and the air inlet pipe is connected with a conveying pipe for conveying ethylene oxide.
By adopting the technical scheme, the unused ethylene oxide in the workshop can be conveniently conveyed to the storage tank through the conveying pipe, the ethylene oxide can be conveniently collected, the field leakage of the ethylene oxide can be reduced, and the safety of a factory can be improved.
Further, the ethylene oxide gas distributor body is horizontally arranged in the storage tank.
By adopting the technical scheme, the ethylene oxide can be stably discharged into the absorption liquid, the discharge probability is reduced, and the absorption efficiency of the absorption liquid on the ethylene oxide is improved.
To sum up, the utility model discloses following beneficial effect has:
1. through set up multirow exhaust hole at the blast pipe one side near the liquid level, ethylene oxide is covered with the absorption liquid below the distributor earlier after the exhaust hole discharges, has prolonged the gas-liquid contact time, has improved the absorption efficiency of absorption liquid to ethylene oxide.
2. Optimized, through adding between intake pipe and blast pipe and establishing a plurality of breather pipes, can realize the many places air feed of blast pipe, avoided ethylene oxide inhomogeneous at the intraductal concentration distribution of blast, make ethylene oxide gaseous in time be covered with the blast pipe, realize the quick even gas distribution of the interior ethylene oxide of blast pipe for ethylene oxide contacts with the large tracts of land of absorption liquid, helps improving the absorption efficiency to ethylene oxide.
3. Optimally, the liquid level disturbance of the absorption liquid around the exhaust holes can be increased by reversely and obliquely arranging the two adjacent rows of exhaust holes, the circular flow of the absorption liquid is promoted, the absorption liquid around the exhaust holes circulates circularly, the absorption liquid is updated constantly, and the absorption rate of the ethylene oxide is accelerated.
4. Compared with the vertical bubbling tank, the horizontal resistance is small, and the bubbling absorption effect is improved, the absorption liquid is required to be added in the tank, when the liquid in the horizontal tank is stored to 15 tons (when the liquid occupies 3/4 of the tank volume, the liquid level is 1.5m, and the maximum bubbling resistance is 0.015 mpa).
5. The length and the width of the horizontal distributor at the bottom of the tank are both larger than those of the vertical distributor, and the bubbling area is 4 times larger than that of the vertical distributor, so that the gas-liquid contact area is also large, and the absorption of ethylene oxide is facilitated.
Drawings
FIG. 1 is a schematic structural diagram of example 1 of a horizontal bubbling catalytic absorption unit, which is mainly used for embodying the positions and connection relationships among a storage tank, an air inlet pipe, a vent pipe, and an exhaust pipe;
FIG. 2 is a perspective view of the ethylene oxide gas distributor body of example 1 in a horizontal bubbling catalytic absorber apparatus;
FIG. 3 is a schematic structural view of a horizontal bubbling catalytic absorption unit in another angle in the embodiment 1, mainly used for showing the relative position relationship between an exhaust hole and an exhaust pipe;
FIG. 4 is an enlarged view of A in FIG. 3;
FIG. 5 is a perspective view of the ethylene oxide gas distributor body of example 2 in a horizontal bubbling catalytic absorber apparatus;
FIG. 6 is a schematic structural view of example 2 in a horizontal bubbling catalytic absorber.
Description of the drawings: 1. an ethylene oxide gas distributor body; 2. an air inlet pipe; 3. a breather pipe; 4. an exhaust pipe; 5. an exhaust hole; 6. guiding an angle; 7. an anti-corrosion coating; 8. a storage tank; 10. a communication pipe is provided.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1: a horizontal bubbling catalytic absorption device is shown in figure 1, and comprises a storage tank 8 with the length of 7m and an ethylene oxide gas distributor body 1, wherein the horizontal storage tank 8 is similar to a capsule-shaped 20-cubic-meter stainless steel tank, the storage tank 8 is hollow and filled with a large amount of absorption liquid, 10w/w% sulfuric acid solution can be used as the absorption liquid, a magnetic turning plate liquid level meter (Changhui instrument) with the model of CH-UHZ-J is installed on the side wall of the storage tank 8, a liquid discharge pipe (not shown in the figure) is arranged at the lower end of the storage tank 8, a sealing ball valve is installed on the liquid discharge pipe, an operator can manually open the ball valve to discharge the absorption liquid in the storage tank 8 according to the actual liquid level in the storage tank 8, a liquid inlet pipe with the sealing ball valve can be additionally installed at the upper end of the storage tank 8, a water suction pump (not shown in the figure) is installed on the liquid inlet pipe, under the action of the water pump, newly configured absorption liquid can be added into the storage tank 8 from the liquid inlet pipe to supplement the absorption liquid reduced due to consumption. In addition, an operator horizontally places the ethylene oxide gas distributor body 1 in the horizontal storage tank 8, and the ethylene oxide gas distributor body 1 is designed at a position 50cm away from the bottom of the tank, so that the liquid level at the upper part of the ethylene oxide gas distributor body 1 can be ensured not to exceed 1500mm at most, and the bubbling success can be ensured.
As shown in fig. 1 and 2, an air inlet pipe 2 is arranged on the ethylene oxide gas distributor body 1, one end of the air inlet pipe 2 is communicated and welded with a vent pipe 3 and two exhaust pipes 4, and the exhaust pipes 4 are completely immersed under the liquid level of the absorption liquid. Wherein, the vent pipe 3 adopts a stainless steel pipe with straight diameter DN100 (namely the nominal diameter is 100 mm), and the vent pipe 4 adopts a stainless steel pipe with length of 6m and straight diameter DN 50. At this time, both ends of the vent pipe 3 are communicated with the two vent pipes 4 arranged in parallel, meanwhile, the end parts of the vent pipes 4 are arranged in a closed manner, the vent pipe 3 and the two vent pipes 4 form an H-shaped structure, and at this time, the whole width of the ethylene oxide gas distributor body 1 is 40cm, so that the maximum optimized installation is realized. Meanwhile, in order to facilitate air distribution, a large number of exhaust holes 5 are formed in each exhaust pipe 4. In addition, the end of the cylindrical air inlet pipe 2 far away from the vent pipe 3 protrudes out of the storage tank 8 (see fig. 6) and is connected with a conveying pipe (not shown in the figure) for conveying ethylene oxide, and at this time, unused ethylene oxide in a workshop enters the ethylene oxide gas distributor body 1 from the inlet end of the air inlet pipe 2 through the conveying pipe, then enters the vent pipe 3 through the air inlet pipe 2, then enters the exhaust pipe 4 through two ends of the vent pipe 3, and then is subjected to gas distribution operation through the exhaust hole 5.
In order to improve the efficiency of the absorption of ethylene oxide by the absorption liquid, as shown in fig. 3 and 4, the exhaust holes 5 are opened on the side of the exhaust pipe 4 away from the liquid surface, and three rows of exhaust holes 5 are provided, so that the bubbles can be ejected downward and then sufficiently contacted with the absorption liquid to be absorbed. Each row of each exhaust pipe 4 is provided with 65 holes, each row is 60 degrees apart, each pipe is 195 holes in total, each hole diameter is DN5 (namely nominal diameter is 5 mm), two pipes of the distributor are 390 holes in total, and the total bubble flow area is not more than the section of the inlet manifold of DN100, so that the gas flow rate of the inlet distributor is not reduced, the pressure is not changed, and the gas can be uniformly distributed. Therefore, after the ethylene oxide is discharged through the exhaust holes 5, the liquid (namely the absorption liquid) below the ethylene oxide gas distributor body 1 is fully distributed, the gas-liquid contact time is prolonged, and the absorption efficiency of the absorption liquid on the ethylene oxide is improved. In order to further improve the absorption efficiency of the second ethylene oxide, the exhaust holes 5 are arranged obliquely, the absolute values of the inclination angles of the two adjacent rows of exhaust holes 5 are the same, and the inner walls of the two adjacent rows of exhaust holes 5 are rotationally symmetrical to each other. At this time, if the ethylene oxide gas distributor body 1 is immersed in the absorption liquid, the disturbance of the liquid level of the absorption liquid around the exhaust holes 5 can be effectively increased, the circulating flow of the absorption liquid is promoted, the absorption liquid around the exhaust holes 5 circulates and is updated constantly, the dispersion of ethylene oxide in the absorption liquid is increased, a stirring-like effect is achieved, and the absorption rate of ethylene oxide is further accelerated.
In order to provide the lead angle 6 at the junction between the inner wall and the outer wall of the exhaust hole 5, as shown in fig. 4, the lead angle 6 is flared outward in the radial direction, and preferably, the inner diameter of the exhaust hole 5 gradually increases from the inside close to the exhaust pipe 4 to the outside. Thereby increasing the contact area of ethylene oxide and exhaust gas absorption and accelerating the absorption rate of ethylene oxide by enlarging the diameter of the outlet of the exhaust hole 5.
For example, as shown in fig. 4, the inner and outer edges of all the pipe members such as the intake pipe 2, the ventilation pipe 2, the exhaust pipe 3, etc. are coated with the anti-corrosion coating 7, and the anti-corrosion coating 7 is an anti-corrosion coating for a chemical storage tank and the anti-corrosion coating used in embodiment 1 of the construction method thereof, which is named under the patent number CN201610223165.4, thereby greatly reducing the corrosion effect of ethylene oxide on all the pipe members, improving the protection effect on all the pipe members, and contributing to prolonging the service life of the ethylene oxide gas distributor body 1.
Example 2: a horizontal bubbling catalytic absorber apparatus, which is different from example 1 in that: as shown in fig. 5 and 6, in order to realize rapid and uniform gas distribution of ethylene oxide in the exhaust pipe 4, four obliquely arranged communicating pipes 10 are communicated with one end of the intake pipe 2 away from the vent pipe 3, one end of each communicating pipe 10 is communicated with the intake pipe 2, and the other end is communicated with the free end of the exhaust pipe 4. In addition, the end of the cylindrical air inlet pipe 2 far away from the vent pipe 3 protrudes out of the storage tank 8 and is connected with a delivery pipe (not shown in the figure) for delivering ethylene oxide, at this time, unused ethylene oxide in a workshop enters the ethylene oxide gas distributor body 1 from the inlet end of the air inlet pipe 2 through the delivery pipe, then a part of ethylene oxide enters the end part of the vent pipe 4 through the communicating pipe 10 at the top of the air inlet pipe 2, meanwhile, the other part of ethylene oxide enters the central part of the vent pipe 4 through the vent pipe 3 at the bottom of the air inlet pipe 2 and is fully distributed in the vent pipe 4 under the action of gas pressure, and finally enters absorption liquid through the vent hole 5, at this time, the ethylene oxide can be dissolved in water and reacts with the water to generate ethylene glycol, and a catalyst, such as sulfuric acid, is more favorable for instant reaction; through the bubbling absorption, the absorptivity of the ethylene oxide waste gas can reach 90 percent, and the rapid and uniform gas distribution of the ethylene oxide in the exhaust pipe 4 is further realized.
The specific embodiments are only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiments without inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. A horizontal bubbling catalytic absorption device comprises a horizontal bubbling catalytic absorption device body, wherein the horizontal bubbling catalytic absorption device body comprises a storage tank (8) which is hollow inside and is filled with a large amount of absorption liquid, and an ethylene oxide gas distributor body (1) located within the storage tank (8), it is characterized in that the ethylene oxide gas distributor body (1) is provided with a gas inlet pipe (2) and a gas outlet pipe (4), one end of the air inlet pipe (2) is communicated with a vent pipe (3), two ends of the vent pipe (3) are communicated with at least two vent pipes (4), the end part of the vent pipe (4) is sealed, a large number of exhaust holes (5) are formed in the exhaust pipe (4), the exhaust holes (5) are only formed in one side, far away from the liquid level, of the exhaust pipe (4), and the exhaust holes (5) are all located below the liquid level of the absorption liquid.
2. The horizontal bubbling catalytic absorption device according to claim 1, wherein a plurality of communicating pipes (10) are arranged on the inlet pipe (2) in a communicating manner, one end of each communicating pipe (10) is communicated with the inlet pipe (2), and the other end is communicated with the free end of the exhaust pipe (4).
3. The horizontal bubbling catalytic absorption device according to claim 2, wherein the exhaust holes (5) are arranged in an inclined manner and are provided in a plurality of rows, the absolute values of the inclination angles of two adjacent rows of exhaust holes (5) are the same, and the inner walls of two adjacent rows of exhaust holes (5) are rotationally symmetric to each other.
4. The horizontal bubbling catalytic absorption unit according to claim 1, wherein a chamfer (6) is provided at the junction between the inner wall and the outer wall of the exhaust hole (5), and the chamfer (6) is flared radially outward.
5. The horizontal bubbling catalytic absorption device according to claim 1, wherein the air inlet pipe (2), the air outlet pipe (4) and the vent pipe (3) are fixedly connected by welding.
6. The horizontal bubbling catalytic absorption device according to claim 1, wherein the inner and outer walls of the inlet pipe (2), the vent pipe (3) and the exhaust pipe (4) are coated with an anticorrosive coating (7).
7. The horizontal bubbling catalytic absorption device according to claim 1, wherein a gas inlet end of the gas inlet pipe (2) is arranged outside the storage tank (8), and a conveying pipe for conveying ethylene oxide is connected to the gas inlet pipe (2).
8. Horizontal bubbling catalytic absorption unit according to claim 7, characterized in that said ethylene oxide gas distributor body (1) is placed horizontally inside a storage tank (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921592685.8U CN210845835U (en) | 2019-09-24 | 2019-09-24 | Horizontal bubbling catalytic absorption device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921592685.8U CN210845835U (en) | 2019-09-24 | 2019-09-24 | Horizontal bubbling catalytic absorption device |
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| CN210845835U true CN210845835U (en) | 2020-06-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680175A (en) * | 2021-08-24 | 2021-11-23 | 上海邦高化学有限公司 | System and method for recycling ethylene oxide in tail gas in pressurized combined mode |
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2019
- 2019-09-24 CN CN201921592685.8U patent/CN210845835U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113680175A (en) * | 2021-08-24 | 2021-11-23 | 上海邦高化学有限公司 | System and method for recycling ethylene oxide in tail gas in pressurized combined mode |
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