Propane dehydrogenation reaction waste heat cascade recycling device

Abstract

The utility model relates to a waste heat recovery technical field especially is a kind of propane dehydrogenation reaction waste heat stepwise recycling device, including recovery tank, the inside of recovery tank is provided with recovery mechanism, the top center of recovery tank is fixedly connected with air inlet pipe, the inside sliding connection of air inlet pipe has filter screen;The recovery mechanism includes the upper heat exchange pipe of fixed connection in the inside of recovery tank, the inside of recovery tank and below the upper heat exchange pipe are fixedly connected with lower heat exchange pipe, the left side of upper heat exchange pipe and lower heat exchange pipe and in recovery tank are all fixedly connected with liquid outlet pipe, the right side of upper heat exchange pipe and lower heat exchange pipe and in recovery tank are all fixedly connected with liquid inlet pipe, by design a kind of propane dehydrogenation reaction waste heat stepwise recycling device, recycling device in the device is used to recycle steam waste heat, solve the problem of lower steam recovery efficiency of existing waste heat recycling device when recycling waste heat, located in recovery channel terminal.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology, specifically a device for the cascade recovery and utilization of waste heat from propane dehydrogenation reaction. Background Technology

[0002] Waste heat recovery and utilization devices are used to recover steam waste heat in propane dehydrogenation systems. However, existing waste heat recovery and utilization devices still have shortcomings. Specifically, the steam recovery efficiency at the end of the recovery channel is low when existing waste heat recovery and utilization devices recover waste heat.

[0003] Therefore, a cascade recovery and utilization device for waste heat from propane dehydrogenation reaction is needed to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide a device for the cascade recovery and utilization of waste heat from propane dehydrogenation reaction, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A propane dehydrogenation reaction waste heat recovery and utilization device includes a recovery tank, a recovery mechanism is provided inside the recovery tank, an air inlet pipe is fixedly connected to the center of the top of the recovery tank, and a filter screen is slidably connected inside the air inlet pipe;

[0007] The recovery mechanism includes an upper heat exchange tube fixedly connected inside the recovery tank, a lower heat exchange tube fixedly connected inside the recovery tank and below the upper heat exchange tube, liquid outlet pipes fixedly connected to the left side of both the upper and lower heat exchange tubes inside the recovery tank, liquid inlet pipes fixedly connected to the right side of both the upper and lower heat exchange tubes inside the recovery tank, a baffle plate fixedly connected to the inner wall of the recovery tank and below the upper heat exchange tube, heat exchange fins fixedly connected to the outer wall of the lower heat exchange tube, and sealing plates rotatably connected above and below the center of the inside of the recovery tank. A sealing strip is fixedly connected to the outer wall of the sealing plate, and a spiral spring is fixedly connected inside the sealing plate at a position away from the sealing strip.

[0008] As a preferred embodiment of this utility model, the recycling tank is made of thermal insulation material, and the air inlet pipe penetrates and extends into the recycling tank.

[0009] As a preferred embodiment of this utility model, the upper heat exchange tube, the lower heat exchange tube, and the heat exchange fins are all made of copper. The upper heat exchange tube and the lower heat exchange tube are both designed as coils. The spiral spring is fixedly connected to the recovery tank.

[0010] As a preferred embodiment of this utility model, the baffle plate and the sealing plate are made of thermal insulation material, and multiple sets of the baffle plate and the heat exchange fins are provided, with the multiple sets of baffle plates arranged alternately in the recovery tank.

[0011] As a preferred embodiment of this utility model, four sets of sealing plates, sealing strips, and spiral springs are provided, and the sealing strips are made of silicone.

[0012] As a preferred embodiment of this utility model, both the liquid outlet pipe and the liquid inlet pipe are designed with an F-shaped structure, and both the liquid outlet pipe and the liquid inlet pipe extend through and out of the recovery tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. In this utility model, a propane dehydrogenation reaction waste heat recovery and utilization device is designed. The device utilizes a recovery unit to recover steam waste heat. High-temperature steam is introduced into the inlet pipe and flows downwards. A filter screen inside the inlet pipe removes impurities from the high-temperature steam. The steam with impurities removed flows into a recovery tank. The high-temperature steam entering the recovery tank pushes open a sealing plate and continues to flow downwards. Simultaneously, cold water is injected into the liquid inlet pipe. The cold water in the liquid inlet pipe flows into the upper and lower heat exchange tubes respectively. The continuing downward-flowing high-temperature steam comes into contact with the upper heat exchange tube, where the cold water absorbs some of the heat from the high-temperature steam. The temperature of the heat-absorbing cold water rises and flows through... The steam, having absorbed some heat, flows out through the outlet pipe and continues to flow downwards. This downward-flowing steam passes through baffles, which reduce the cross-sectional area of ​​the steam flow, thus decreasing its velocity. The reduced-velocity steam then flows to the lower heat exchanger tube, where it exchanges heat again with the cold water. The heat exchange fins on the outer wall of the lower heat exchanger tube increase the heat exchange area, improving the heat absorption efficiency of the cold water. Simultaneously, the slower flow rate increases the contact time between the steam and the lower heat exchanger tube and fins, further enhancing the heat absorption effect of the cold water. This improves the steam recovery efficiency at the end of the heat exchange channel, solving the problem of low steam recovery efficiency at the end of the recovery channel in existing waste heat recovery devices. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the present invention;

[0017] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0018] In the diagram: 1. Recovery tank; 2. Recovery mechanism; 3. Air inlet pipe; 4. Filter screen; 201. Upper heat exchanger tube; 202. Lower heat exchanger tube; 203. Liquid outlet pipe; 204. Liquid inlet pipe; 205. Baffle plate; 206. Heat exchange fins; 207. Sealing plate; 208. Sealing strip; 209. Scroll spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0020] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model can be implemented 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 utility model more thorough and complete.

[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 may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document 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 this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] For examples, please refer to Figure 1-3 This utility model provides a technical solution:

[0024] A propane dehydrogenation reaction waste heat recovery and utilization device includes a recovery tank 1, a recovery mechanism 2 is provided inside the recovery tank 1, an air inlet pipe 3 is fixedly connected to the top center of the recovery tank 1, and a filter screen 4 is slidably connected inside the air inlet pipe 3.

[0025] The recycling tank 1 is made of thermal insulation material, and the air inlet pipe 3 passes through and extends into the recycling tank 1.

[0026] In this embodiment, reference Figure 2 and Figure 3 The recovery mechanism 2 includes an upper heat exchange tube 201 fixedly connected inside the recovery tank 1, a lower heat exchange tube 202 fixedly connected inside the recovery tank 1 and below the upper heat exchange tube 201, an outlet pipe 203 fixedly connected to the left side of both the upper heat exchange tube 201 and the lower heat exchange tube 202 and inside the recovery tank 1, an inlet pipe 204 fixedly connected to the right side of both the upper heat exchange tube 201 and the lower heat exchange tube 202 and inside the recovery tank 1, a baffle plate 205 fixedly connected to the inner wall of the recovery tank 1 and below the upper heat exchange tube 201, heat exchange fins 206 fixedly connected to the outer wall of the lower heat exchange tube 202, a sealing plate 207 rotatably connected above and below the center of the inside of the recovery tank 1, a sealing strip 208 fixedly connected to the outer wall of the sealing plate 207, and a spiral spring 209 fixedly connected inside the sealing plate 207 and at a position away from the sealing strip 208.

[0027] The upper heat exchanger tube 201, lower heat exchanger tube 202, and heat exchange fins 206 are all made of copper. The upper heat exchanger tube 201 and lower heat exchanger tube 202 are both coil-type structures. The spiral spring 209 is fixedly connected to the recovery tank 1. The baffle plate 205 and sealing plate 207 are made of heat insulation material. Multiple sets of baffle plates 205 and heat exchange fins 206 are provided, and multiple sets of baffle plates 205 are arranged alternately inside the recovery tank 1. Four sets of sealing plates 207, sealing strips 208, and spiral springs 209 are provided. The sealing strips 208 are made of silicone. The liquid outlet pipe 203 and liquid inlet pipe 204 are both F-type structures. The liquid outlet pipe 203 and liquid inlet pipe 204 both penetrate and extend to the outside of the recovery tank 1.

[0028] The working process of this utility model is as follows: When the propane dehydrogenation reaction waste heat recovery device designed in this scheme is in operation, high-temperature steam is introduced into the inlet pipe 3. The high-temperature steam flows downwards along the inlet pipe 3. The filter screen 4 inside the inlet pipe 3 removes impurities from the high-temperature steam. The high-temperature steam with impurities removed flows into the recovery tank 1. The high-temperature steam entering the recovery tank 1 pushes open the sealing plate 207 and continues to flow downwards. Simultaneously, cold water is injected into the liquid inlet pipe 204. The cold water in the liquid inlet pipe 204 flows into the upper heat exchanger 201 and the lower heat exchanger 202 respectively. The high-temperature steam continuing to flow downwards comes into contact with the upper heat exchanger 201. The cold water in the upper heat exchanger 201 absorbs some of the heat from the high-temperature steam. The temperature of the cold water that has absorbed heat rises and flows through the liquid outlet pipe. Steam 203 flows out, and the steam that has absorbed some heat continues to flow downward. The downward-flowing steam passes through baffle 205, which reduces the cross-sectional area of ​​the steam flow, thereby reducing the steam velocity. The reduced-speed steam flows to the lower heat exchange tube 202, where the cold water and steam exchange heat again. The heat exchange fins 206 on the outer wall of the lower heat exchange tube 202 can increase the heat exchange area and improve the heat absorption efficiency of the cold water. At the same time, the slower flow rate increases the contact time between the steam and the lower heat exchange tube 202 and the heat exchange fins 206, further improving the heat absorption effect of the cold water. After absorbing heat, the cold water in the lower heat exchange tube 202 is discharged through the outlet pipe 203. The steam that has absorbed heat pushes open the sealing plate 207 below and is discharged from the recovery tank 1.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A propane dehydrogenation reaction waste heat recovery and utilization device, comprising a recovery tank (1), characterized in that: The recycling tank (1) is equipped with a recycling mechanism (2) inside. An air inlet pipe (3) is fixedly connected to the center of the top of the recycling tank (1). A filter screen (4) is slidably connected inside the air inlet pipe (3). The recovery mechanism (2) includes an upper heat exchanger (201) fixedly connected inside the recovery tank (1), a lower heat exchanger (202) fixedly connected inside the recovery tank (1) and below the upper heat exchanger (201), an outlet pipe (203) fixedly connected to the left side of both the upper heat exchanger (201) and the lower heat exchanger (202) inside the recovery tank (1), and an inlet pipe (204) fixedly connected to the right side of both the upper heat exchanger (201) and the lower heat exchanger (202) inside the recovery tank (1). A baffle plate (205) is fixedly connected to the inner wall of the recovery tank (1) and below the upper heat exchange tube (201). A heat exchange fin (206) is fixedly connected to the outer wall of the lower heat exchange tube (202). A sealing plate (207) is rotatably connected above and below the center of the interior of the recovery tank (1). A sealing strip (208) is fixedly connected to the outer wall of the sealing plate (207). A spiral spring (209) is fixedly connected to the interior of the sealing plate (207) and at a position away from the sealing strip (208).

2. The propane dehydrogenation reaction waste heat recovery and utilization device according to claim 1, characterized in that: The recycling tank (1) is made of thermal insulation material, and the air inlet pipe (3) extends through and into the recycling tank (1).

3. The propane dehydrogenation reaction waste heat recovery and utilization device according to claim 1, characterized in that: The upper heat exchange tube (201), lower heat exchange tube (202) and heat exchange fins (206) are all made of copper. The upper heat exchange tube (201) and lower heat exchange tube (202) are both designed as coils. The spiral spring (209) is fixedly connected to the recovery tank (1).

4. The propane dehydrogenation reaction waste heat recovery and utilization device according to claim 1, characterized in that: The baffle (205) and the sealing plate (207) are made of thermal insulation material. Multiple sets of the baffle (205) and the heat exchange fins (206) are provided, and the multiple sets of baffles (205) are arranged alternately in the recovery tank (1).

5. The propane dehydrogenation reaction waste heat recovery and utilization device according to claim 1, characterized in that: The sealing plate (207), sealing strip (208) and spiral spring (209) are each provided in four sets, and the sealing strip (208) is made of silicone.

6. The propane dehydrogenation reaction waste heat recovery and utilization device according to claim 1, characterized in that: Both the outlet pipe (203) and the inlet pipe (204) are designed with an F-type structure, and both the outlet pipe (203) and the inlet pipe (204) extend through and out of the recovery tank (1).

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