Liquefied gas desulfurization device

Abstract

The utility model discloses a liquefied gas desulfurization device, which relates to the technical field of liquefied gas treatment and comprises a tower body, an input pipe, a liquid distributor, a spiral partition plate, a spiral pipe and a return pipe, the input pipe vertically penetrates through the center of the top of the tower body, the liquid distributor is rotatably mounted at the lower end of the input pipe through a sealing bearing, and a plurality of liquid distribution pipes are arranged on the side part of the liquid distributor; the same side of each liquid distribution pipe is provided with a row of atomizing nozzles, the spiral partition plate is fixed on the inner wall of the tower body in the middle of the inner cavity of the tower body, and the spiral partition plate and the inner wall of the tower body form a spiral channel; the spiral pipe fixedly sleeves the outer side of the tower body and corresponds to the spiral channel, and a plurality of atomizing nozzles penetrating through the tower body are arranged on the inner side of the spiral pipe; a liquid storage tank is arranged at the bottom of an inner cavity of the tower body, a circulating pump is mounted outside the tower body on one side of the liquid storage tank, a liquid inlet of the circulating pump is communicated with the liquid storage tank, and a liquid outlet of the circulating pump is communicated with the input pipe and the spiral pipe through a return pipe; according to the device, the liquefied gas is subjected to two-stage treatment through the spiral pipe and the self-rotating liquid distributor, so that the treatment effect on sulfides in the liquefied gas is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquefied gas processing, in particular to a liquefied gas desulfurization device. Background Art

[0002] In the process of oil refining, liquefied petroleum gas (LPG) produced by coking, atmospheric and vacuum, catalytic cracking and other devices contains a large amount of sulfides, including various forms of organic sulfur in addition to H2S. Sulfides can cause poisoning and deactivation of catalysts in subsequent processing, while elemental sulfur and hydrogen sulfide are highly corrosive to pipelines and storage containers. Since a desulfurization tower is required to desulfurize the sulfur-containing substances in the liquefied petroleum gas, the existing desulfurization treatment method for liquefied gas is generally to spray an alkaline treatment liquid into the treatment tower through a nozzle so that it contacts the produced liquefied petroleum gas, thereby treating the sulfides therein and reducing the sulfur content in the liquefied gas. However, since the alkaline treatment liquid cannot fully contact the liquefied gas, the treatment effect of the sulfides therein is poor, and the alkaline treatment liquid is also wasted. Utility Model Content

[0003] The purpose of the utility model is to provide a liquefied gas desulfurization device in view of the defects in the prior art.

[0004] The technical scheme of the utility model is: a liquefied gas desulfurization device, including a tower body, an air inlet pipe and a liquid inlet pipe are arranged at the lower part of the tower body, an exhaust pipe is arranged at the top, and a liquid discharge pipe is arranged at the bottom; it also includes an input pipe, a liquid distributor, a spiral baffle, a spiral pipe and a reflux pipe, the input pipe vertically passes through the center of the top of the tower body, the liquid distributor is rotatably installed at the lower end of the input pipe through a sealing bearing, and a plurality of liquid distribution pipes are arranged in a circular array on the side thereof, and the inner cavities of the input pipe, the liquid distributor and the liquid distribution pipe are communicated; a row of atomizing nozzles are arranged on the same side of the plurality of liquid distribution pipes, the spiral baffle is fixedly installed on the inner wall of the tower body in the middle of the inner cavity of the tower body, and the spiral baffle and the inner wall of the tower body form a spiral channel; the spiral pipe is fixedly sleeved on the outer side of the tower body and corresponds to the spiral channel, and its pitch is the same as that of the spiral channel, and a plurality of atomizing nozzles passing through the tower body are arranged on the inner side thereof;

[0005] The bottom of the inner cavity of the tower body is a liquid storage tank, and a circulation pump is installed outside the tower body on one side of the liquid storage tank. The liquid inlet of the circulation pump passes through the tower body and is connected to the liquid storage tank, and the liquid outlet is connected to the input pipe and the spiral pipe through a reflux pipe.

[0006] Preferably, it also includes a rectifying plate located between the liquid distributor and the spiral partition, wherein the rectifying plate is horizontally arranged and an outer edge thereof is fixed on the inner wall of the tower body.

[0007] Preferably, it also includes a filter cartridge, an annular scraper, a guide rod, a lead screw, a nut and a motor, the filter cartridge is sleeved on the outside of the liquid inlet of the circulation pump, and its root is fixed on the inner wall of the tower body; the annular scraper is slidably sleeved on the filter cartridge, and a plurality of guide rods are horizontally fixed on the inner wall of the tower body and arranged in parallel, and a plurality of sliding sleeves that slide with the guide rods are provided on the annular scraper, the lead screw horizontally penetrates the tower body, is rotatably connected to the tower body, and its outer end is transmission connected to the motor; the nut is threadedly connected to the lead screw, and is fixed on the annular scraper.

[0008] Preferably, the liquid inlet pipe is located on the upper side of the liquid storage tank, and the air inlet pipe is directly opposite to the lower port of the spiral channel.

[0009] Compared with the prior art, the utility model has the following advantages:

[0010] The device performs two-stage treatment on liquefied gas through a spiral tube and a self-rotating liquid distributor, thereby improving the treatment effect on sulfides in the liquefied gas; the setting of the spiral channel prolongs the rising path of the liquefied gas, thereby improving the desulfurization effect; the rectifying effect of the rectifying plate can make the liquefied gas evenly distributed, which helps it to fully contact with the atomized alkali liquid sprayed from the liquid distribution pipe, thereby further improving the desulfurization effect; the setting of the filter cartridge and the scraping mechanism can extend the service life of the device and reduce production and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 for Figure 1 A magnified schematic diagram of center A.

[0013] In the figure: 1, tower body, 2, air inlet pipe, 3, liquid inlet pipe, 4, exhaust pipe, 5, discharge pipe, 6, input pipe, 7, liquid distributor, 8, liquid distribution pipe, 9, atomizing nozzle, 10, spiral partition, 11, spiral tube, 12, circulation pump, 13, reflux pipe, 14, rectifier plate, 15, filter cartridge, 16, annular scraper, 17, guide rod, 18, sliding sleeve, 19, lead screw, 20, nut, 21, motor. DETAILED DESCRIPTION

[0014] The utility model is further described below with reference to the accompanying drawings and embodiments. Embodiment 1

[0015] Reference Figure 1As shown, a liquefied gas desulfurization device includes a tower body 1, wherein an air inlet pipe 2 and a liquid inlet pipe 3 are arranged at the lower part of the tower body 1, an exhaust pipe 4 is arranged at the top, and a liquid discharge pipe 5 is arranged at the bottom; the tower body 1 also includes an input pipe 6, a liquid distributor 7, a spiral partition 10, a spiral tube 11 and a reflux pipe 13, wherein the input pipe 6 vertically passes through the center of the top of the tower body 1, the liquid distributor 7 is rotatably installed at the lower end of the input pipe 6 through a sealed bearing, and three liquid distribution pipes 8 are arranged in a circular array on the side thereof, and the inner cavities of the input pipe 6, the liquid distributor 7 and the liquid distribution pipe 8 are communicated; a row of atomizing nozzles 9 are arranged on the same side of the three liquid distribution pipes 8, the spiral partition 10 is fixedly installed on the inner wall of the tower body 1 in the middle of the inner cavity of the tower body 1, and the spiral partition 10 and the inner wall of the tower body 1 form a spiral channel; the spiral tube 11 is fixedly sleeved on the outer side of the tower body 1 and corresponds to the spiral channel, and its pitch is the same as that of the spiral channel, and a plurality of atomizing nozzles 9 passing through the tower body 1 are arranged on the inner side thereof.

[0016] The bottom of the inner cavity of the tower body 1 is a liquid storage tank. A circulation pump 12 is installed outside the tower body 1 on one side of the liquid storage tank. The liquid inlet of the circulation pump 12 passes through the tower body 1 and is connected to the liquid storage tank. Its liquid outlet is connected to the input pipe 6 and the spiral tube 11 through the reflux pipe 13.

[0017] In more detail, the liquid inlet pipe 3 is located at the upper side of the liquid storage tank, and the air inlet pipe 2 is directly opposite to the lower end of the spiral channel.

[0018] During operation, a certain amount of alkali solution is firstly added into the liquid storage tank through the liquid inlet pipe 3, and the circulation pump 12 is started to pump the alkali solution into the input pipe 6 and the spiral tube 11 respectively. The alkali solution flows into the liquid distributor 7 through the input pipe 6, and then is sprayed out from the atomizing nozzle 9 on the side of the liquid distribution pipe 8, and the liquid distributor 7 and the liquid distribution pipe 8 are pushed to rotate so that the atomized alkali solution is evenly distributed in the inner cavity of the tower body 1; at the same time, the alkali solution entering the spiral tube 11 is sprayed out from the several atomizing nozzles 9 on the inner side of the spiral tube 11, and is evenly distributed in the spiral channel in an atomized form; at this time, the liquefied gas to be treated is introduced into the tower body 1 through the air inlet pipe 2, and the liquefied gas first flows upward along the spiral channel and contacts with the atomized alkali solution in the spiral channel, during which part of the sulfide in the liquefied gas is reacted and treated; then the liquefied gas continues to flow upward, and contacts with the atomized alkali solution sprayed out from the liquid distribution pipe 8, thereby improving the treatment effect of the sulfide in the liquefied gas; the treated liquefied gas is discharged through the exhaust pipe 4.

[0019] The alkali solution in the liquid storage tank is recycled and can be discharged through the drain pipe 5 after being used for a period of time, thereby avoiding the waste of the alkali solution.

[0020] The device performs two-stage treatment on the liquefied gas through the spiral tube 11 and the self-rotating liquid distributor 7, thereby improving the treatment effect on the sulfide in the liquefied gas; the setting of the spiral channel prolongs the rising path of the liquefied gas, thereby improving the desulfurization effect. Embodiment 2

[0021] As a preferred embodiment of the present utility model, this embodiment adds a rectifier plate 14 on the basis of the first embodiment, specifically:

[0022] This embodiment further includes a rectifying plate 14 located between the liquid distributor 7 and the spiral partition plate 10 . The rectifying plate 14 is arranged horizontally, and its outer edge is fixed on the inner wall of the tower body 1 .

[0023] The rectifying effect of the rectifying plate 14 can make the liquefied gas evenly distributed, which helps it to fully contact with the atomized alkali liquid sprayed from the liquid distribution pipe 8, thereby further improving the desulfurization effect. Embodiment 3

[0024] As a preferred embodiment of the utility model, this embodiment is provided with a filter cartridge 15 and a scraping mechanism on the basis of the first embodiment, specifically:

[0025] Reference Figure 2 As shown, this embodiment also includes a filter cartridge 15, an annular scraper 16, a guide rod 17, a lead screw 19, a nut 20 and a motor 21. The filter cartridge 15 is sleeved on the outer side of the liquid inlet of the circulation pump 12, and its root is fixed on the inner wall of the tower body 1; the annular scraper 16 is slidably sleeved on the filter cartridge 15, and four guide rods 17 are horizontally fixed on the inner wall of the tower body 1 and arranged in parallel. The annular scraper 16 is provided with four sliding sleeves 18 that slide with the guide rods 17. The lead screw 19 horizontally penetrates the tower body 1 and is rotationally connected to the tower body 1. The outer end of the lead screw is transmission-connected to the motor 21; the nut 20 is threadedly connected to the lead screw 19 and is fixed on the annular scraper 16.

[0026] The filter cartridge 15 can filter the solid sulfide after the reaction in the alkali solution to prevent it from entering the reflux pipe 13; after working for a long time, the solid sulfide will adhere to the outer wall of the filter cartridge 15 and affect its filtering effect. At this time, the motor 21 is started to drive the screw 19 to rotate, and the screw 19 then drives the annular scraper 16 to move back and forth along the filter cartridge 15 through the nut 20, thereby scraping off the solid sulfide on its outer wall.

[0027] The present invention is not limited to the above-mentioned implementation modes. Within the knowledge scope of those skilled in the art, various changes can be made without departing from the purpose of the present invention. The changed contents still belong to the protection scope of the present invention.

Claims

1. A liquefied gas desulfurization device, comprising a tower body, an air inlet pipe and a liquid inlet pipe are arranged at the lower part of the tower body, an exhaust pipe is arranged at the top, and a liquid discharge pipe is arranged at the bottom; characterized in that: It also includes an input pipe, a liquid distributor, a spiral baffle, a spiral pipe and a reflux pipe. The input pipe vertically passes through the center of the top of the tower body. The liquid distributor is rotatably installed at the lower end of the input pipe through a sealed bearing. The side of the input pipe is provided with a plurality of liquid distribution pipes in a circular array, and the inner cavities of the input pipe, the liquid distributor and the liquid distribution pipe are connected; a row of atomizing nozzles are provided on the same side of the plurality of liquid distribution pipes. The spiral baffle is fixedly installed on the inner wall of the tower body in the middle of the inner cavity of the tower body, and the spiral baffle and the inner wall of the tower body form a spiral channel; the spiral pipe is fixedly sleeved on the outer side of the tower body and corresponds to the spiral channel, and its pitch is the same as that of the spiral channel. The inner side of the spiral pipe is provided with a plurality of atomizing nozzles that pass through the tower body; The bottom of the inner cavity of the tower body is a liquid storage tank, and a circulation pump is installed outside the tower body on one side of the liquid storage tank. The liquid inlet of the circulation pump passes through the tower body and is connected to the liquid storage tank, and the liquid outlet is connected to the input pipe and the spiral pipe through a reflux pipe.

2. A liquefied gas desulfurization device according to claim 1, characterized in that: It also includes a rectifying plate located between the liquid distributor and the spiral partition plate. The rectifying plate is horizontally arranged, and its outer edge is fixed on the inner wall of the tower body.

3. A liquefied gas desulfurization device according to claim 1, characterized in that: It also includes a filter cartridge, an annular scraper, a guide rod, a lead screw, a nut and a motor. The filter cartridge is sleeved on the outside of the liquid inlet of the circulation pump, and its root is fixed on the inner wall of the tower body; the annular scraper is slidably sleeved on the filter cartridge, and a plurality of guide rods are horizontally fixed on the inner wall of the tower body and arranged in parallel. A plurality of sliding sleeves that slide with the guide rods are provided on the annular scraper. The lead screw horizontally penetrates the tower body, is rotatably connected to the tower body, and its outer end is transmission-connected to the motor; the nut is threadedly connected to the lead screw, and is fixed on the annular scraper.

4. A liquefied gas desulfurization device according to claim 1, characterized in that: The liquid inlet pipe is located on the upper side of the liquid storage tank, and the air inlet pipe is directly opposite to the lower port of the spiral channel.

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