Propane dehydrogenation device capable of improving propylene yield

Abstract

The utility model relates to the technical field of propane dehydrogenation devices, in particular to a propane dehydrogenation device capable of improving propylene yield, which comprises a dehydrogenation reactor, an input pipe arranged at the top end of the dehydrogenation reactor, a flow meter arranged outside the input pipe, an electromagnetic valve arranged on one side of the flow meter, and a catalyst lifter connected with the input pipe. A screw rod is arranged inside the catalyst lifter, a water cooling device is arranged outside the catalyst lifter, a first output pipe is arranged at the bottom end of the dehydrogenation reactor, a catalyst cyclic regeneration device is arranged at the bottom end of the first output pipe, the cyclic regeneration device is connected with a spiral conveyor, and a second conveying pipe is arranged on one side of the first output pipe; the second conveying pipe is connected with a collector, a heater is arranged outside the dehydrogenation reactor, and the structure of the flowmeter, the electromagnetic valve, the catalyst lifter and the water cooling device is utilized, so that the problem that a traditional propane dehydrogenation device with the propylene yield is always rough in the aspect of catalyst control, and a catalyst is easily and rapidly inactivated is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to propane dehydrogenation device technical field, concretely is a propane dehydrogenation device of improving propylene output rate. BACKGROUND

[0002] Propylene as important petrochemical basic raw material, its downstream derivatives mainly include polypropylene, propylene oxide, acrylonitrile, acrylic acid, cumene, phenol, acetone, oxo alcohol, isopropyl alcohol, in recent years, the production process of propylene source development becomes the hotspot, and the propane dehydrogenation (PDH) preparation propylene process is most concerned. The biggest feature of PDH technology is high technical content, raw material, product single, product yield is high, process route is simple and stable, low energy consumption, safety, environmental protection.

[0003] The traditional propylene output rate propane dehydrogenation device is rough in catalyst control, and catalyst is easy to deactivate quickly, in addition, after catalyst circulation regeneration, raw materials are easy to accumulate due to complex and winding conveying pipeline, and production efficiency is affected.

[0004] Therefore, it is particularly important to design a propane dehydrogenation device for improving propylene output rate to change the above technical defects and improve the overall practicability. INVENTION CONTENTS

[0005] The utility model discloses a propane dehydrogenation device for improving propylene output rate to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A propane dehydrogenation device for improving propylene output rate, comprising a dehydrogenation reactor, an input pipe is arranged at the top end of the dehydrogenation reactor, a flowmeter is arranged outside the input pipe, an electromagnetic valve is arranged on one side of the flowmeter, the input pipe is connected with a catalyst lifter, a screw rod is arranged in the catalyst lifter, a water cooling device is arranged outside the catalyst lifter, a first output pipe is arranged at the bottom end of the dehydrogenation reactor, a catalyst circulation regeneration device is arranged at the bottom end of the first output pipe, the circulation regeneration device is connected with a screw conveyor, the screw conveyor is connected with a pneumatic conveying system, a second conveying pipe is arranged on one side of the first output pipe, the second conveying pipe is connected with a collector, and a heater is arranged outside the dehydrogenation reactor.

[0008] As a preferred scheme of the utility model, the water cooling device comprises a water cooling head, a water pipe, a radiator and a water pump, the water pipe is spirally arranged outside the catalyst lifter, the water pipe is connected with the water cooling head and the radiator, the water pump is connected with a motor for driving, and the water pump is used for extracting cooling liquid from the water cooling head and sending the cooling liquid to the radiator.

[0009] As the preferred scheme of the utility model, one side of the catalyst elevator is equipped with a feeding port, the feeding port is funnel-shaped, one end of the screw rod is equipped with a driving motor, and the inside of the catalyst elevator is equipped with a temperature sensor.

[0010] As the preferred scheme of the utility model, one side of the catalyst elevator is equipped with a feeding port, the feeding port is funnel-shaped, one end of the screw rod is equipped with a driving motor, and the inside of the catalyst elevator is equipped with a temperature sensor.

[0011] As the preferred scheme of the utility model, one side of the catalyst elevator is equipped with a feeding port, the feeding port is funnel-shaped, one end of the screw rod is equipped with a driving motor, and the inside of the catalyst elevator is equipped with a temperature sensor.

[0012] As the preferred scheme of the utility model, one side of the catalyst elevator is equipped with a feeding port, the feeding port is funnel-shaped, one end of the screw rod is equipped with a driving motor, and the inside of the catalyst elevator is equipped with a temperature sensor.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] In the utility model, the structure of the flowmeter, the electromagnetic valve, the catalyst elevator and the water cooling device is used, the dehydrogenation reactor is entered by the propane raw material and the catalyst, the dehydrogenation reaction is generated under the action of the heater, the generated propylene is collected through the output pipe, the catalyst is regenerated by the circulating regeneration device, and is circulated back to the reactor through the conveying system, the electromagnetic valve, the flowmeter and the control system ensure that the raw material flow is stable, the temperature sensor and the water cooling device keep the temperature of the catalyst elevator appropriate, the conveying pipes of the whole device are straight up and straight down, the zigzag and redundancy are avoided, the traditional propylene output rate propane dehydrogenation device is solved in the catalyst control aspect, the catalyst is deactivated quickly, in addition, after the catalyst is regenerated, the raw material is prone to accumulation due to the complex and zigzag conveying pipeline, and the production efficiency is affected. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is the structure diagram of the utility model as a whole;

[0016] Fig. 2 It is the process schematic view of the utility model;

[0017] Fig. 3 It is the structure schematic view of the catalyst elevator assembly of the utility model.

[0018] In the figure: 1, dehydrogenation reactor; 2, input pipe; 201, flow meter; 202, electromagnetic valve; 203, catalyst lift; 204, screw; 205, water cooling device; 3, first output pipe; 301, circulating regeneration device; 302, screw conveyor; 303, pneumatic conveying system; 4, second conveying pipe; 401, collector; 5, heater. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0020] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. Several embodiments of the present application are given. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] Embodiments, please see Figs. 1-3 The present application provides a technical solution:

[0024] The utility model provides a kind of propane dehydrogenation device for improving propylene output rate, including dehydrogenation reactor 1, the top of dehydrogenation reactor 1 is equipped with input pipe 2, the outside of input pipe 2 is equipped with flowmeter 201, one side of flowmeter 201 is equipped with electromagnetic valve 202, input pipe 2 connects catalyst riser 203, the inside of catalyst riser 203 is equipped with screw 204, the outside of catalyst riser 203 is equipped with water cooling device 205, the bottom of dehydrogenation reactor 1 is equipped with first output pipe 3, the bottom of first output pipe 3 is equipped with catalyst circulation regeneration device 301, circulation regeneration device 301 connects auger 302, auger 302 connects pneumatic conveying system 303, one side of first output pipe 3 is equipped with second conveying pipe 4, second conveying pipe 4 connects collector 401, the outside of dehydrogenation reactor 1 is equipped with heater 5, by opening heater 5, propane raw material and catalyst are input into dehydrogenation reactor 1 subsequently by input pipe 2, charging port, in this process, flowmeter 201 real-time monitoring and recording propane raw material flow, according to the data of flowmeter 201, control system automatically adjusts the opening of electromagnetic valve 202, to accurately control the propane flow into dehydrogenation reactor 1, propane is dehydrogenated in dehydrogenation reactor 1, due to the action of catalyst, and propylene is generated, wherein catalyst riser 203 is constantly lifted to dehydrogenation reactor 1 by the action of screw 204, ensure the efficient progress of reaction, simultaneously, according to temperature sensor, water cooling device 205 is cooled to catalyst riser 203, to prevent it overheating, finally, the propylene generated by reaction is collected by collector 401 as finished product by second conveying pipe 4, while catalyst and unreacted propane enter catalyst circulation regeneration device 301 by first output pipe 3, in catalyst circulation regeneration device 301, deactivated catalyst is regenerated to restore its activity, regenerated catalyst is sent back to dehydrogenation reactor 1 by auger 302 and pneumatic conveying system 303, realize the recycling of catalyst;

[0025] The water cooling device comprises a water cooling head, a water pipe, a radiator, and a water pump. The water pipe is spirally arranged outside the catalyst lift 203. The water pipe is connected to the water cooling head and the radiator. The water pump is connected to the motor for driving. The water pump is used to extract the coolant from the water cooling head and send it to the radiator to deactivate the catalyst. One side of the catalyst lift 203 is provided with a charging port in the shape of a funnel. One end of the screw rod 204 is provided with a driving motor. The inside of the catalyst lift 203 is provided with a temperature sensor to monitor the temperature of the catalyst. One side of the dehydrogenation reactor 1 is provided with a charging port for adding raw materials. The outside of the dehydrogenation reactor 1 is provided with a support frame for supporting the entire device. One side of the dehydrogenation reactor 1 is provided with a control system. The flow meter 201 is connected to the control system for real-time monitoring and recording of the flow in the input pipe 2. The control system automatically adjusts the opening of the electromagnetic valve 202 according to the flow data, thereby accurately controlling the flow into the dehydrogenation reactor 1 to ensure that the reaction is carried out under optimal conditions. The collector 401 is connected to the second conveying pipe 4 for collecting the finished products generated by the dehydrogenation reactor 1 and conveying the finished products to the subsequent processing unit through the collector 401 for subsequent processing.

[0026] The utility model discloses a working procedure: when using the device, first open the heater 5, provide the required reaction temperature for the dehydrogenation reactor 1, check and ensure that all equipment, including flowmeter 201, solenoid valve 202, catalyst elevator 203, water cooling device 205, screw conveyor 302 and pneumatic conveying system 303 are in normal working condition, then through input pipe 2, charging port, input the propane raw material and catalyst into the dehydrogenation reactor 1, in this process, flowmeter 201 real-time monitoring and recording the flow of propane raw material, according to the data of flowmeter 201, the control system automatically adjusts the opening of solenoid valve 202, thereby accurately controlling the propane flow into the dehydrogenation reactor 1, propane in the dehydrogenation reactor 1, due to the action of catalyst, dehydrogenation reaction generates propylene, wherein catalyst elevator 203 is continuously lifted to the dehydrogenation reactor 1 through the action of screw rod 204, ensure the efficient reaction, at the same time, according to temperature sensor, water cooling device 205 carries out cooling to catalyst elevator 203, prevents its overheating, finally, the reaction generated propylene is collected by collector 401 through second conveying pipe 4, as finished product, and catalyst and unreacted propane enter catalyst circulation regeneration device 301 through first output pipe 3, in catalyst circulation regeneration device 301, the deactivated catalyst is regenerated and recovered, and the regenerated catalyst is sent back to the dehydrogenation reactor 1 through screw conveyor 302 and pneumatic conveying system 303, realizing the recycling of catalyst, in the whole process, the control system will continuously monitor the temperature, pressure and other parameters in the dehydrogenation reactor 1, ensure that the reaction is carried out under the best conditions, according to the need, can adjust the power of heater 5, to maintain the temperature stability in the dehydrogenation reactor 1, when the production is completed, close heater 5 and all conveying equipment, stop the input of raw material and catalyst, clean and maintain the dehydrogenation device, prepare for the next production.

[0027] In the utility model patent, the dehydrogenation reactor 1, flowmeter 201, solenoid valve 202, catalyst elevator 203, circulation regeneration device 301, screw conveyor 302, pneumatic conveying system 303, collector 401 and heater 5 are mature technology, so the circuit and principle are not described in detail.

[0028] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A propane dehydrogenation apparatus for increasing the yield of propylene, comprising a dehydrogenation reactor (1), characterized by: The top end of the dehydrogenation reactor (1) is provided with an input pipe (2), the outside of the input pipe (2) is provided with a flow meter (201), one side of the flow meter (201) is provided with a solenoid valve (202), the input pipe (2) is connected with a catalyst elevator (203), the inside of the catalyst elevator (203) is provided with a screw rod (204), the outside of the catalyst elevator (203) is provided with a water cooling device (205), the bottom end of the dehydrogenation reactor (1) is provided with a first output pipe (3), the bottom end of the first output pipe (3) is provided with a catalyst circulating regeneration device (301), the circulating regeneration device (301) is connected with a screw conveyor (302), the screw conveyor (302) is connected with a pneumatic conveying system (303), one side of the first output pipe (3) is provided with a second conveying pipe (4), the second conveying pipe (4) is connected with a collector (401), and the outside of the dehydrogenation reactor (1) is provided with a heater (5).

2. The propane dehydrogenation unit for increasing the yield of propylene according to claim 1, characterized in that: The water cooling device comprises a water cooling head, a water pipe, a radiator and a water pump, the water pipe is spirally arranged outside the catalyst elevator (203), the water pipe is connected with the water cooling head and the radiator, and the water pump is connected with a motor for driving, and the water pump is used for pumping the coolant from the water cooling head to the radiator.

3. The apparatus for dehydrogenation of propane to increase propylene output according to claim 1, wherein: One side of the catalyst elevator (203) is provided with a feeding port, the feeding port is funnel-shaped, one end of the screw rod (204) is provided with a driving motor, and the inside of the catalyst elevator (203) is provided with a temperature sensor.

4. The propane dehydrogenation unit for increasing the yield of propylene according to claim 1, characterized in that: One side of the dehydrogenation reactor (1) is provided with a feeding port for adding raw materials, and the outside of the dehydrogenation reactor (1) is provided with a support frame for supporting the whole device.

5. The propane dehydrogenation unit for increasing the yield of propylene according to claim 1, characterized in that: One side of the dehydrogenation reactor (1) is provided with a control system, and the flow meter (201) is connected with the control system, which is used for real-time monitoring and recording the flow in the input pipe (2), the control system automatically adjusts the opening degree of the solenoid valve (202) according to the flow data, so as to accurately control the flow into the dehydrogenation reactor (1).

6. The propane dehydrogenation unit for increasing the yield of propylene according to claim 1, characterized in that: The collector (401) is connected to the second conveying pipe (4), which is used for collecting the finished products generated by the dehydrogenation reactor (1), and conveying the finished products to the subsequent processing unit through the collector (401).

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