A pdh apparatus comprising a pre-processing mechanism

Abstract

The utility model discloses a kind of PDH devices containing pretreatment mechanism, comprising: tank;The above device enters tank through main input pipe, then is shunted to multiple groups equidistant distribution installation ring two and diffusion branch pipe through transmission pipe, realize uniform dispersion, avoid the problem of uneven distribution caused by concentrated injection.Meanwhile, auxiliary material enters by auxiliary material input pipe, check valve ensures one-way flow, auxiliary material is evenly distributed in annular pipe and is sprayed by spray head, further promote raw material mixing.Propane is treated in tank by propane impurity removal assembly, wherein impurity removal filter material and impurity removal plate effectively remove impurities, multiple groups equidistantly arranged filter port and impurity removal plate improve impurity removal efficiency.Processed material is finally discharged by bottom output assembly, bottom cover and output pipe ensure that material is smoothly output, solenoid valve controls output flow.This design effectively solves the problem of uneven distribution caused by concentrated injection point, improves desulfurization and demethanization effect, improves the performance and efficiency of pretreatment device.

Description

Technical Field

[0001] This utility model relates to the field of PDH production technology, and more specifically, to a PDH device including a pretreatment mechanism. Background Technology

[0002] Propane Dehydrogenation (PDH) is a chemical process that converts propane (C3H8) into propylene (C3H6). In the PDH process, propane undergoes a dehydrogenation reaction under high temperature and with the aid of a catalyst, losing two hydrogen atoms to produce propylene. This process is typically carried out at 500-600°C and requires specific catalysts to improve reaction selectivity and efficiency. PDH is a crucial method for producing propylene, an important chemical feedstock widely used in the production of polypropylene, propylene oxide, acrylonitrile, and other chemical products. PDH technology is widely adopted due to its high efficiency, environmental friendliness, and low energy consumption, especially in the chemical industry where propylene demand is constantly growing, where the PDH process provides vital support for meeting market demand for propylene.

[0003] A search revealed an existing patent (publication number: CN206843349U) that discloses a desulfurization and methanol removal tower for propane dehydrogenation to propylene production. The tower includes a material outlet, a tank top, a tank body, and a tank bottom. A first feeding port is located on the tank top, and the material outlet is located below the first feeding port. Two remote thermometer ports are located at the upper and lower ends of the tank body, respectively. Two discharge ports are symmetrically distributed about the tank body's axis at the tank bottom. A material inlet is located at the center of the tank bottom, and a second feeding port is located at the bottom end of the tank bottom. This invention, through the coordinated arrangement of the material outlet, remote thermometer, tank body, and discharge ports, performs desulfurization and methanol removal within the tank body, ensuring the normal operation of the hydrogenation reactor, preventing the reaction between methanol and hydrogen, avoiding catalyst deactivation, reducing production risks, and improving enterprise efficiency.

[0004] Because the feedstock injection points are relatively concentrated, the propane feedstock entering the tank cannot be rapidly and evenly dispersed throughout the reaction space. This results in some areas having excessively high reactant concentrations while others have excessively low concentrations. This uneven distribution leads to incomplete reactions, affecting the desulfurization and methanol removal effects, and consequently reducing the performance and efficiency of the entire pretreatment unit. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides a PDH device including a pretreatment mechanism to solve the problem that the concentrated injection of raw materials leads to uneven distribution, which affects the reaction effect and reduces the performance of the device.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a PDH device including a pretreatment mechanism, comprising: a tank; an injection diffusion assembly mounted on the tank, the injection diffusion assembly being used to disperse the injected main raw material; an auxiliary material diffusion assembly mounted on the tank, the auxiliary material diffusion assembly being used to disperse the injected auxiliary material; a propane impurity removal assembly mounted inside the tank, the propane impurity removal assembly being used to pretreat propane; and a bottom output assembly mounted at the bottom of the tank, the bottom output assembly being used to output the product.

[0007] Preferably, the injection diffusion assembly includes: a main input pipe fixedly installed on the top of the tank, an installation ring fixedly installed inside the tank, a transmission pipe fixedly installed on one side of the installation ring, and the main input pipe communicating with the transmission pipe.

[0008] Preferably, the injection diffusion assembly further includes: a second mounting ring fixedly installed inside the tank body, a diffusion branch pipe fixedly installed inside the second mounting ring, a transmission pipe fixedly installed at one end of the diffusion branch pipe, and multiple sets of the second mounting ring and the diffusion branch pipe are provided, with multiple sets of the second mounting ring and the diffusion branch pipe equidistantly arranged inside the tank body.

[0009] Preferably, the auxiliary material diffusion assembly includes: an auxiliary material input pipe fixedly installed on the outer surface of the tank, a one-way valve fixedly installed on the auxiliary material input pipe, an annular pipe fixedly installed at one end of the one-way valve, and a nozzle fixedly installed at the top of the annular pipe.

[0010] Preferably, there are two sets of auxiliary material input pipes and one-way valves, and the two sets of auxiliary material input pipes and one-way valves are symmetrically arranged on both sides of the annular pipe.

[0011] Preferably, the propane impurity removal assembly includes: a mounting base fixedly installed inside the tank body, the mounting base having a filter port, impurity removal filter media detachably installed inside the mounting base, and an impurity removal plate detachably installed on the top of the mounting base.

[0012] Preferably, multiple sets of filter ports and impurity removal plates are provided, and the multiple sets of filter ports and impurity removal plates are equidistantly arranged on the mounting base.

[0013] Preferably, the bottom output component includes: a bottom cover fixedly installed at the bottom of the tank, an output pipe fixedly installed at the bottom of the bottom cover, and a solenoid valve fixedly installed at the bottom of the output pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention introduces raw materials into the tank through a main inlet pipe, which then distributes the material through a transmission pipe to multiple sets of equidistantly distributed mounting rings and diffuser branches, achieving uniform dispersion and avoiding the uneven distribution problem caused by concentrated injection. Simultaneously, auxiliary materials enter through an auxiliary material inlet pipe, with a one-way valve ensuring unidirectional flow. The auxiliary materials are evenly distributed in the annular pipes and sprayed out through nozzles, further promoting raw material mixing. Propane is treated within the tank by a propane impurity removal component, where the impurity removal filter media and plates effectively remove impurities, and multiple sets of equidistantly arranged filter ports and plates improve impurity removal efficiency. The treated material is finally discharged through a bottom outlet component, with a bottom cover and outlet pipe ensuring smooth material output, and a solenoid valve controlling the output flow rate. This design effectively solves the problem of uneven distribution caused by concentrated raw material injection points, improves desulfurization and methanol removal effects, and enhances the performance and efficiency of the pretreatment unit. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the injection diffusion assembly structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the auxiliary material diffusion component of this utility model;

[0019] Figure 4 This is a schematic diagram of the propane impurity removal component of this utility model;

[0020] Figure 5 This is a schematic diagram of the bottom output component structure of this utility model.

[0021] [Figure Labels]

[0022] 1. Tank body; 2. Injection diffusion assembly; 3. Auxiliary material diffusion assembly; 4. Propane impurity removal assembly; 5. Bottom output assembly; 201. Main input pipe; 202. Mounting ring one; 203. Transfer pipe; 204. Mounting ring two; 205. Diffusion branch pipe; 301. Auxiliary material input pipe; 302. One-way valve; 303. Ring pipe; 304. Nozzle; 401. Mounting base; 402. Filter port; 403. Impurity removal filter media; 404. Impurity removal plate; 501. Bottom cover; 502. Output pipe; 503. Solenoid valve. Detailed Implementation

[0023] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0024] Example 1

[0025] A preferred embodiment of the PDH device including a pretreatment mechanism provided by this utility model is, for example... Figures 1 to 5 As shown: It includes: a tank body 1; a material injection and diffusion assembly 2 assembled on the tank body 1, which is used to disperse the injected main raw material; an auxiliary material diffusion assembly 3 assembled on the tank body 1, which is used to disperse the injected auxiliary material; a propane impurity removal assembly 4 assembled inside the tank body 1, which is used to pre-treat propane; and a bottom output assembly 5 assembled at the bottom of the tank body 1, which is used to output the product.

[0026] In this embodiment, the injection diffusion assembly 2 includes: a main input pipe 201 fixedly installed on the top of the tank 1, an installation ring 202 fixedly installed inside the tank 1, a transmission pipe 203 fixedly installed on one side of the installation ring 202, and the main input pipe 201 communicating with the transmission pipe 203.

[0027] In this embodiment, the injection diffusion assembly 2 further includes: a second mounting ring 204 fixedly installed inside the tank body 1, a diffusion branch pipe 205 fixedly installed inside the second mounting ring 204, a transmission pipe 203 fixedly installed at one end of the diffusion branch pipe 205, and multiple sets of the second mounting ring 204 and the diffusion branch pipe 205 are provided, and multiple sets of the second mounting ring 204 and the diffusion branch pipe 205 are equidistantly arranged inside the tank body 1.

[0028] In this embodiment, the auxiliary material diffusion assembly 3 includes: an auxiliary material input pipe 301 fixedly installed on the outer surface of the tank body 1, a one-way valve 302 fixedly installed on the auxiliary material input pipe 301, an annular pipe 303 fixedly installed at one end of the one-way valve 302, and a nozzle 304 fixedly installed at the top of the annular pipe 303.

[0029] In this embodiment, two sets of auxiliary material input pipes 301 and one-way valves 302 are provided, and the two sets of auxiliary material input pipes 301 and one-way valves 302 are symmetrically arranged on both sides of the annular pipe 303.

[0030] Example 2

[0031] Based on Embodiment 1, a preferred embodiment of the PDH device including a pretreatment mechanism provided by this utility model is, for example... Figures 1 to 5 As shown: The propane impurity removal assembly 4 includes: a mounting base 401 fixedly installed inside the tank body 1, a filter port 402 opened on the mounting base 401, a detachable impurity removal filter material 403 installed inside the mounting base 401, and an impurity removal plate 404 detachably installed on the top of the mounting base 401.

[0032] In this embodiment, multiple sets of filter ports 402 and impurity removal plates 404 are provided, and the multiple sets of filter ports 402 and impurity removal plates 404 are equidistantly arranged on the mounting base 401.

[0033] In this embodiment, the bottom output component 5 includes: a bottom cover 501 fixedly installed at the bottom of the tank 1, an output pipe 502 fixedly installed at the bottom of the bottom cover 501, and a solenoid valve 503 fixedly installed at the bottom of the output pipe 502.

[0034] In this PDH unit, propane feedstock enters tank 1 through the main inlet pipe 201, and is then distributed via the transfer pipe 203 to multiple sets of equidistantly distributed mounting rings 204 and diffuser branches 205, achieving uniform dispersion and avoiding uneven distribution caused by concentrated injection. Simultaneously, auxiliary materials enter through the auxiliary material inlet pipe 301, with a one-way valve 302 ensuring unidirectional flow. The auxiliary materials are evenly distributed in the annular pipe 303 and sprayed out through nozzles 304, further promoting feedstock mixing. Propane is treated within tank 1 by the propane impurity removal component 4, where the impurity removal filter media 403 and impurity removal plates 404 effectively remove impurities, and the multiple sets of equidistantly arranged filter ports 402 and impurity removal plates 404 improve impurity removal efficiency. The treated material is finally discharged through the bottom outlet component 5, with the bottom cover 501 and outlet pipe 502 ensuring smooth material output, and a solenoid valve 503 controlling the output flow rate. This design effectively solves the problem of uneven distribution caused by concentrated feedstock injection points, improves desulfurization and methanol removal effects, and enhances the performance and efficiency of the pretreatment unit.

[0035] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0036] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0037] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PDH device including a pretreatment mechanism, characterized in that, include: Tank body (1); A material diffusion assembly (2) is mounted on the tank body (1), the material diffusion assembly (2) being used to disperse the injected main raw material; An auxiliary material diffusion assembly (3) is mounted on the tank (1) and is used to disperse the injected auxiliary material. The propane impurity removal assembly (4) is installed inside the tank (1) and is used to pretreat propane. A bottom output assembly (5) is mounted at the bottom of the tank (1) for outputting material.

2. A PDH device including a pretreatment mechanism according to claim 1, characterized in that, The injection diffusion assembly (2) includes: A main input pipe (201) is fixedly installed on the top of the tank (1). An installation ring (202) is fixedly installed inside the tank (1). A transmission pipe (203) is fixedly installed on one side of the installation ring (202). The main input pipe (201) is connected to the transmission pipe (203).

3. A PDH device including a pretreatment mechanism according to claim 2, characterized in that, The injection diffusion assembly (2) further includes: A second mounting ring (204) is fixedly installed inside the tank body (1). A diffuser branch pipe (205) is fixedly installed inside the second mounting ring (204). A transmission pipe (203) is fixedly installed at one end of the diffuser branch pipe (205). Multiple sets of the second mounting ring (204) and diffuser branch pipe (205) are provided, and multiple sets of the second mounting ring (204) and diffuser branch pipe (205) are equidistantly arranged inside the tank body (1).

4. A PDH device including a pretreatment mechanism according to claim 3, characterized in that, The auxiliary material diffusion component (3) includes: An auxiliary material input pipe (301) is fixedly installed on the outer surface of the tank (1). A one-way valve (302) is fixedly installed on the auxiliary material input pipe (301). An annular pipe (303) is fixedly installed at one end of the one-way valve (302). A nozzle (304) is fixedly installed at the top of the annular pipe (303).

5. A PDH device including a pretreatment mechanism according to claim 4, characterized in that, The auxiliary material input pipe (301) and the one-way valve (302) are provided in two sets, and the two sets of auxiliary material input pipes (301) and one-way valves (302) are symmetrically arranged on both sides of the annular pipe (303).

6. A PDH device including a pretreatment mechanism according to claim 5, characterized in that, The propane impurity removal component (4) includes: A mounting base (401) is fixedly installed inside the tank (1). A filter port (402) is provided on the mounting base (401). A filter material (403) is detachably installed inside the mounting base (401). A filter plate (404) is detachably installed on the top of the mounting base (401).

7. A PDH device including a pretreatment mechanism according to claim 6, characterized in that, The filter port (402) and the impurity removal plate (404) are provided in multiple sets, and the multiple sets of filter ports (402) and impurity removal plates (404) are equidistantly arranged on the mounting base (401).

8. A PDH device including a pretreatment mechanism according to claim 1, characterized in that, The bottom output component (5) includes: A bottom cover (501) is fixedly installed at the bottom of the tank (1). An output pipe (502) is fixedly installed at the bottom of the bottom cover (501). A solenoid valve (503) is fixedly installed at the bottom of the output pipe (502).

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