A naphtha pre-hydrotreating apparatus

Abstract

The utility model provides a kind of naphtha prehydrogenation equipment, including box cylinder, gas circulation unit and bubble breaking unit, box cylinder has feed pipe and discharge pipe;Gas circulation unit includes circulation pipeline and box cover, box cover is buckled at the opening of box cylinder, circulation pipeline is provided with gas pump, the upper portion of circulation pipeline is connected on box cover and is communicated with the inside of box cylinder, the lower end of circulation pipeline is inserted into box cylinder and is provided with several air outlets;Bubble breaking unit is located in box cylinder, including transmission shaft and several broken nets, several broken nets are set along the circumference of transmission shaft, transmission shaft is connected in drive part.Compared with prior art, the scheme is through the setting of multiple air outlets to disperse hydrogen, which improves the speed and effect of prehydrogenation treatment;In addition, through the setting of transmission shaft rotation continuous repeatedly crossing naphtha surface broken bubble, the speed of broken bubble releasing hydrogen is accelerated, through the setting of cone-shaped converging hydrogen recycling, the efficiency of hydrogen recycling is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of naphtha production technology, and in particular to a naphtha pre-hydrogenation treatment device. Background Technology

[0002] The main purpose of naphtha prehydrogenation is to perform hydrorefining pretreatment on the feedstock to protect the reforming catalyst and ensure the long-term stable operation of the reforming unit. Through prehydrogenation, impurities such as sulfur, nitrogen, chlorine, and oxygen in naphtha can be converted into H2S, NH3, HCl, and H2O, and removed from the naphtha. Naphtha prehydrogenation effectively reduces the impurity content in the feedstock, meeting the quality requirements of the reforming unit. Furthermore, naphtha prehydrogenation can hydrogenate and saturate olefins in the naphtha, converting them into corresponding alkanes, thereby improving the properties of the feedstock and making it more suitable for subsequent reforming processes.

[0003] Furthermore, naphtha pre-hydrogenation decomposes organometallic compounds, allowing metals to be adsorbed onto the catalyst surface and removed. This helps prevent the reforming catalyst from being poisoned and deactivated by metallic impurities. Naphtha refined through pre-hydrogenation has a significantly reduced impurity content, ensuring the full performance of the reforming catalyst. This contributes to the long-term stable operation of the catalytic reforming unit and improves production efficiency.

[0004] However, in the current process of naphtha pre-hydrogenation, the contact area between hydrogen and naphtha is limited, resulting in incomplete reaction. Furthermore, hydrogen is lightweight, and the unreacted portion rises to the surface of the naphtha, failing to react with it. This leads to a waste of hydrogen and seriously affects the speed and effectiveness of pre-hydrogenation. Utility Model Content

[0005] This invention provides a naphtha pre-hydrogenation treatment device to solve the technical problems of slow reaction speed and poor effect of hydrogen and naphtha in the existing naphtha pre-hydrogenation treatment.

[0006] This utility model provides a naphtha pre-hydrogenation treatment device, comprising:

[0007] A cylindrical container, which is a container with an opening at the top, and has an inlet pipe and an outlet pipe on the cylindrical container;

[0008] An air circulation unit includes a circulation pipe and a cover. The cover is fastened to the opening of the box body. An air pump is installed on the circulation pipe. The upper part of the circulation pipe is connected to the cover and communicates with the inside of the box body. The lower end of the circulation pipe extends into the box body and is provided with several air outlets.

[0009] The bubble breaking unit is located inside the cylinder and above the air outlet. It includes a drive shaft and several crushing meshes. The crushing meshes are arranged circumferentially along the drive shaft, which is connected to a drive unit.

[0010] In one embodiment of the present invention, a liquid level window is provided on the side wall of the tank body, through which the liquid level height of naphtha inside the tank body can be viewed.

[0011] In one embodiment of the present invention, a liquid level window is provided on the side wall of the tank body, through which the liquid level height of naphtha inside the tank body can be viewed.

[0012] In one embodiment of the present invention, the box cover is frustoconical, the circulation pipe is connected to the upper end of the box cover, and a sealing gasket is provided at the lower end of the box cover. The sealing gasket is used to seal the openings of the box cover and the box body.

[0013] In one embodiment of the present invention, a diffuser is provided at the lower end of the circulation pipe, and a plurality of the air outlets are provided on the diffuser.

[0014] In one embodiment of the present invention, the air diffuser is located at the lower part of the box body, and a plurality of air outlets are evenly distributed at intervals.

[0015] In one embodiment of this utility model, the driving unit is a servo motor, and the crushing mesh is evenly distributed along the circumferential interval of the transmission shaft.

[0016] In one embodiment of this utility model, there are two bubble-breaking units, which are arranged side by side above the diffuser frame, and the drive shafts of the two bubble-breaking units rotate in opposite directions.

[0017] In one embodiment of the present invention, a fixing frame is provided around the crushing mesh to open the crushing mesh, and the crushing mesh is fixed on the transmission shaft by the fixing frame.

[0018] In one embodiment of the present invention, the lower end of the box body is provided with multiple support legs, which stably support the box body.

[0019] The beneficial effects of this utility model are as follows: The naphtha pre-hydrogenation treatment equipment proposed in this utility model involves feeding naphtha into a tank body through a feed pipe, followed by the introduction of hydrogen gas. Due to its low density, hydrogen gas floats at the top of the tank body and approaches the tank cover. At this point, a gas pump is activated, and the hydrogen gas is collected from the top of the tank body along the tank cover. Under the action of the gas pump, the hydrogen gas is transported to the tank body through a circulation pipe and sprayed out through the gas outlet into the naphtha to fully react with it. Simultaneously, as hydrogen gas forms bubbles in the naphtha, a bubble-breaking unit is activated. The drive shaft above the gas outlet rotates under the action of the drive unit, driving the crushing mesh to rotate and break up the bubbles, thus increasing the speed at which hydrogen is released from the broken bubbles and accelerating the hydrogen release rate. Compared with existing technologies, this solution improves the speed and effect of pre-hydrogenation by distributing hydrogen through multiple gas outlets; in addition, the continuous and repeated movement of the rotating shaft through the naphtha surface to break up air bubbles accelerates the release of hydrogen from the broken bubbles; and the hydrogen collection and recycling mechanism through the tank cover ensures the efficiency of hydrogen recycling. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] In the attached diagram:

[0022] Figure 1 This is a schematic diagram of the structure of a naphtha pre-hydrogenation treatment device according to an example of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the tank body in a naphtha pre-hydrogenation treatment device according to an example of this utility model;

[0024] Figure 3 This is a schematic diagram of the gas circulation unit in a naphtha pre-hydrogenation treatment device according to an example of this utility model;

[0025] Figure 4 This is a side view of the gas circulation unit in a naphtha pre-hydrogenation treatment device according to an example of this utility model;

[0026] Figure 5 This is a schematic diagram of the defoaming unit in a naphtha pre-hydrogenation treatment device, which is an example of this utility model.

[0027] The attached figures are labeled as follows:

[0028] 101. Tank body; 102. Support leg; 103. Liquid level window; 104. Discharge pipe; 105. Inlet pipe; 106. Electrically controlled valve.

[0029] 201. Box cover; 202. Sealing gasket; 203. Pipe connector; 204. Circulation pipe; 205. Air pump; 206. Air diffuser; 207. Air outlet.

[0030] Drive shaft 301, servo motor 302, fixed frame 303, crushing net 304. Detailed Implementation

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0033] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0034] The specific structure of a naphtha pre-hydrogenation treatment device in this utility model is described in conjunction with [reference]. Figure 1 and Figure 5 The naphtha pre-hydrogenation treatment equipment includes:

[0035] The container body 101 is a container with an opening at the top, and the container body 101 has an inlet pipe 105 and an outlet pipe 104.

[0036] The air circulation unit includes a circulation pipe 204 and a cover 201. The cover 201 is fastened to the opening of the box body 101. An air pump 205 is provided on the circulation pipe 204. The upper part of the circulation pipe 204 is connected to the cover 201 and communicates with the interior of the box body 101. The lower end of the circulation pipe 204 extends into the box body 101 and is provided with a plurality of air outlets 207.

[0037] The bubble breaking unit is located inside the cylinder 101 and above the air outlet 207. It includes a drive shaft 301 and several crushing nets 304. The crushing nets 304 are arranged circumferentially along the drive shaft 301, which is connected to a drive unit.

[0038] The container body 101 is a rectangular box-shaped structure used to hold naphtha. It is open at the top, and the lid 201 is fastened to the opening to seal the inside of the container body 101. The lower end of the circulation pipe 204 is connected to the lid 201 through a pipe joint 203. The lid 201 is provided with a hole to facilitate the pipe to extend into the inside of the container body 101. The circulation pipe 204 connects to the inside of the container body 101.

[0039] In actual implementation, naphtha is fed into the tank body 101 through the feed pipe 105. The amount of naphtha should ideally submerge the defoaming unit. Then, hydrogen is introduced into the tank body 101. This can be done through the feed pipe 105, the opening, or by connecting a hydrogen filling pipe to the circulation pipe 204 to introduce hydrogen into the tank body 101. Because hydrogen has a low density, it will eventually float above the tank body 101 and accumulate below the tank cover 201. At this time, the air pump 205 is activated, and the hydrogen is collected from the upper part of the tank body 101 along the tank cover 201. Under the action of the air pump 205, the hydrogen is transported along the circulation pipe 204 to the lower part of the tank body 101 and sprayed out through the air outlet 207. Since the air outlet 207 is located at the lower part of the tank body 101, the hydrogen sprayed out by the air outlet 207 will enter the naphtha and react fully with the naphtha. This increases the contact area between hydrogen and naphtha, improves the mixing effect, improves the effect of pre-hydrogenation treatment, and reduces hydrogen waste. Simultaneously, since hydrogen gas forms bubbles upon entering the naphtha, the bubble-breaking unit is activated. This involves using a drive unit to rotate the transmission shaft 301, which in turn rotates the crushing screen 304. This action breaks up the hydrogen bubbles in the naphtha, increasing the rate at which hydrogen is released. The released hydrogen then collects at the top cover and is recycled. After the naphtha has undergone pre-hydrogenation, it can be discharged from the storage tank for further processing.

[0040] In some embodiments, a liquid level window 103 is provided on the side wall of the tank body 101, through which the liquid level height of naphtha inside the tank body 101 can be viewed. For example, Figure 1 and Figure 2 As shown, the liquid level window 103 can be opened from the upper part to the lower part of the tank body 101, located on the side wall of the tank body 101, so that the bubble breaking unit inside the tank body 101 can be seen; naphtha enters the tank body 101 through the feed pipe 105, and the liquid level height of naphtha in the tank body 101 can be viewed in real time through the liquid level window 103.

[0041] In some embodiments, the discharge pipe 104 is located at the lower part of the box body 101, and the feed pipe 105 is located at the upper part of the box body 101. Both the discharge pipe 104 and the feed pipe 105 are equipped with electrically controlled valves 106. For example, Figure 1 and Figure 2 As shown, the electric control valve 106 facilitates the opening and closing of the feed pipe 105 and the discharge pipe 104, and the arrangement of the feed pipe 105 and the discharge pipe 104 facilitates the entry and exit of naphtha into and out of the tank body 101.

[0042] In some embodiments, the lid 201 is frustoconical, the circulation pipe 204 is connected to the upper end of the lid 201, and a sealing gasket 202 is provided at the lower end of the lid 201. The sealing gasket 202 is used to seal the openings of the lid 201 and the box body 101. For example, Figure 1 and Figure 3 , Figure 4 As shown, the truncated cone-shaped cover 201 has an inverted funnel-shaped interior, which facilitates the collection and convergence of hydrogen gas onto the circulation pipe 204 at the apex, so as to facilitate the circulation of hydrogen gas through the circulation pipe 204. The sealing gasket 202 can seal the fastening point between the cover 201 and the upper end of the cylinder 101 to prevent hydrogen gas from leaking out from there.

[0043] In some embodiments, a diffuser frame 206 is provided at the lower end of the circulation pipe 204, and a plurality of air outlets 207 are disposed on the diffuser frame 206. For example, Figure 3 and Figure 4 As shown, the diffuser 206 facilitates the setting and arrangement of the outlet nozzles 207, and is more conducive to the uniform delivery of hydrogen to the naphtha.

[0044] In some embodiments, the diffuser 206 is located at the lower part of the housing 101, and a plurality of the air outlets 207 are evenly distributed at intervals. For example, Figure 3 and Figure 4As shown, the outlet nozzle 207 needs to be located below the defoaming unit, so it is more appropriate to set the diffuser 206 at the lower part of the cylinder 101. The outlet nozzles 207 are evenly distributed, which can evenly input hydrogen into the naphtha and further improve the pre-hydrogenation processing speed.

[0045] In some embodiments, the driving unit is a servo motor 302, and the shredding mesh 304 is evenly distributed at circumferential intervals along the drive shaft 301. For example, Figure 5 As shown, the servo motor 302 serves as a simple and convenient drive unit, while the uniformly spaced crushing mesh 304 effectively crushes hydrogen bubbles.

[0046] In some embodiments, two bubble-breaking units are arranged side-by-side above the diffuser frame 206, and the drive shafts 301 of the two bubble-breaking units rotate in opposite directions. For example, Figure 5 As shown, two bubble-breaking units are arranged in a separated manner inside the tank body 101 to fully contact and break up the hydrogen bubbles in the naphtha.

[0047] In some embodiments, a fixing frame 303 is provided around the shredder 304 to open the shredder 304, and the shredder 304 is fixed to the drive shaft 301 by the fixing frame 303. For example, Figure 5 As shown, the fixed net facilitates the opening and use of the crushing net 304, and also makes it easy to install the crushing net 304 on the drive shaft 301.

[0048] In some embodiments, the lower end of the box body 101 is provided with a plurality of support legs, which stably support the box body 101. For example, Figure 1 and Figure 2 As shown, there are four support legs, which are distributed at the four corners of the box body 101. The support legs can support the box body 101, making it convenient to place the box body 101.

[0049] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A naphtha pre-hydrogenation treatment device, characterized in that, include: A cylindrical container, which is a container with an opening at the top, and has an inlet pipe and an outlet pipe on the cylindrical container; An air circulation unit includes a circulation pipe and a cover. The cover is fastened to the opening of the box body. An air pump is installed on the circulation pipe. The upper part of the circulation pipe is connected to the cover and communicates with the inside of the box body. The lower end of the circulation pipe extends into the box body and is provided with several air outlets. The bubble breaking unit is located inside the cylinder and above the air outlet. It includes a drive shaft and several crushing meshes. The crushing meshes are arranged circumferentially along the drive shaft, which is connected to a drive unit.

2. The naphtha pre-hydrogenation treatment equipment according to claim 1, characterized in that: The side wall of the tank is provided with a liquid level window, through which the liquid level height of naphtha inside the tank can be viewed.

3. The naphtha pre-hydrogenation treatment equipment according to claim 1, characterized in that: The discharge pipe is located at the lower part of the box body, and the feed pipe is located at the upper part of the box body. Both the discharge pipe and the feed pipe are equipped with electrically controlled valves.

4. The naphtha pre-hydrogenation treatment equipment according to claim 1, characterized in that: The box cover is frustoconical in shape, the circulation pipe is connected to the upper end of the box cover, and a sealing gasket is provided at the lower end of the box cover. The sealing gasket is used to seal the openings of the box cover and the box body.

5. The naphtha pre-hydrogenation treatment equipment according to claim 1, characterized in that: A diffuser is provided at the lower end of the circulation pipe, and several of the air outlets are provided on the diffuser.

6. The naphtha pre-hydrogenation treatment equipment according to claim 5, characterized in that: The air diffuser is located at the lower part of the box body, and several air outlets are evenly distributed at intervals.

7. The naphtha pre-hydrogenation treatment equipment according to claim 1, characterized in that: The drive unit is a servo motor, and the crushing mesh is evenly distributed along the circumferential interval of the drive shaft.

8. The naphtha pre-hydrogenation treatment equipment according to claim 6, characterized in that: There are two bubble-breaking units, which are arranged side by side above the diffuser frame, and the drive shafts of the two bubble-breaking units rotate in opposite directions.

9. A naphtha pre-hydrogenation treatment device according to any one of claims 1-8, characterized in that: The crushing mesh is surrounded by a fixing frame that opens the crushing mesh, and the crushing mesh is fixed to the drive shaft by the fixing frame.

10. A naphtha pre-hydrogenation treatment device according to any one of claims 1-8, characterized in that: The lower end of the box body is provided with multiple support legs, which stably support the box body.

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