Heat exchanger for producing hydrogen from methanol

Abstract

According to the heat exchanger for producing hydrogen from methanol, the shell is horizontally arranged, and the length of the shell can be changed according to actual production, so that a production site can be fully utilized, the length of the heat exchange tube can be prolonged as much as possible, and hydrogen and carbon dioxide gas can be conveniently cooled; the heat exchange pipe in the shell can spontaneously dissipate heat to the heat exchange cavity located in the inner wall of the shell for heat transfer, the heat conduction plate is further arranged, the heat conduction plate can play a role in supporting and stabilizing the heat exchange pipe, heat on the heat exchange pipe can be further transferred to the outer wall of the heat exchange cavity, heat conduction oil is further heated, and the heat exchange efficiency is improved. The heat conduction oil is conveyed inside the heat exchange cavity through the oil pump, the heated heat conduction oil is conveyed to the outside of the prepared methanol solution box body to preheat the methanol solution, the preheated heat conduction oil is cooled and then conveyed back to the inside of the heat exchange cavity to be heated by the oil pump, and cyclic utilization of the heat conduction oil is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger technical field for hydrogen production especially relates to a heat exchanger for hydrogen production of methanol. BACKGROUND

[0002] Methanol hydrogen production is a common hydrogen production process, using advanced methanol steam reforming pressure swing adsorption technology to prepare pure hydrogen and carbon dioxide rich mixed gas, after further post-processing, hydrogen and carbon dioxide gas can be obtained at the same time. In the process of methanol hydrogen production, in addition to hydrogen, the conversion gas also contains a certain amount of carbon dioxide, at this time, the hydrogen temperature is relatively high, the hydrogen and carbon dioxide need to be cooled before the subsequent reaction, at present, the methanol in the hydrogen production raw material is exchanged with the high temperature hydrogen by the gas heat exchanger, on the one hand, the hydrogen can be cooled, on the other hand, the methanol raw material can be preheated, this way can utilize the waste heat, improve the utilization efficiency and reduce the cost.

[0003] The existing heat exchanger has low heat exchange efficiency, and only relies on the heat exchanger pipe to dissipate heat to the outside to heat the heat conducting oil; the existing heat exchanger is difficult to recycle the heat conducting oil when collecting the heat of hydrogen and preheating the methanol raw material; therefore, the utility model provides a heat exchanger for hydrogen production of methanol to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model provides a heat exchanger for hydrogen production of methanol, aims at solving the problems in the background art.

[0005] The utility model is realized in this way, a heat exchanger for hydrogen production of methanol, including the casing,

[0006] The casing is horizontally arranged cylindrical structure, the both ends of casing are equipped with feed chamber and discharge chamber respectively,

[0007] The inner wall of casing is equipped with heat exchange cavity, the inside of casing is equipped with a plurality of heat exchange pipes, a plurality of heat exchange pipes are distributed along the extension direction of casing, a plurality of heat exchange pipes are supported and fixed through heat conducting plate, the heat conducting plate is equipped with a plurality of, a plurality of heat conducting plates are distributed along the extension direction of casing at intervals, the heat conducting plate is connected with the outer wall of heat exchange cavity, a plurality of through holes are equipped on the heat conducting plate, one end of heat exchange pipe is communicated with feed chamber, and the other end penetrates through the through hole and is communicated with discharge chamber.

[0008] Preferably, one end of the casing is provided with an oil inlet pipe, and the other end is provided with an oil outlet pipe, the oil inlet pipe and the oil outlet pipe are communicated with the inside space of the heat exchange cavity.

[0009] Preferably, the oil inlet pipe and the oil outlet pipe are oppositely distributed on the top and the bottom of the casing.

[0010] Preferably, the outer wall of the shell is provided with an inlet pipe and an outlet pipe, the inlet pipe communicates with the interior space of the inlet chamber, and the outlet pipe communicates with the interior space of the outlet chamber.

[0011] Preferably, the inlet pipe is located at the top of the shell, and the outlet pipe is located at the end face of the side of the shell away from the inlet pipe.

[0012] Preferably, the bottom of the shell is provided with two oppositely distributed legs.

[0013] Compared with the prior art, the shell has the following beneficial effects:

[0014] 1. The shell is horizontally arranged and can change its length according to actual production, so that the production site can be fully utilized, the length of the heat exchange pipe is as long as possible, the hydrogen gas and the carbon dioxide gas are conveniently cooled, and the heat exchange efficiency is improved.

[0015] 2. The heat exchange pipe in the shell can radiate heat to the heat exchange cavity on the inner wall of the shell for heat transfer, and the heat conduction plate can further transfer the heat on the heat exchange pipe to the outer wall of the heat exchange cavity, further heat the heat conduction oil, and increase the heat exchange efficiency.

[0016] 3. The heat exchange cavity is provided with an oil pump for conveying the heat conduction oil, the heat conduction oil after heating is conveyed to the outside of the methanol solution tank to preheat the methanol solution, and the heat conduction oil after preheating is cooled and then pumped back to the heat exchange cavity for heating, so that the heat conduction oil is recycled. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a perspective view of the overall structure of the utility model;

[0018] Figure 2 It is a front view of the overall structure of the utility model;

[0019] Figure 3 It is a front sectional view of the overall structure of the utility model;

[0020] Figure 4 It is a perspective view of the connection between the heat conduction plate and the heat exchange pipe 6 in the utility model.

[0021] In the drawing:

[0022] 1. Shell; 11. Inlet chamber; 12. Outlet chamber; 2. Heat exchange cavity; 3. Oil inlet pipe; 4. Oil outlet pipe; 5. Heat conduction plate; 51. Through hole; 6. Heat exchange pipe; 7. Inlet pipe; 8. Outlet pipe; 9. Leg. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0025] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] See also Figures 1 to 4 The utility model provides a technical solution: a heat exchanger for methanol to hydrogen production, comprising a shell 1; the shell 1 is a horizontally arranged cylindrical structure, with a feed chamber 11 and a discharge chamber 12 respectively provided at both ends of the shell 1; a heat exchange cavity 2 is provided on the inner wall of the shell 1, and a plurality of heat exchange tubes 6 are provided inside the shell 1, and the plurality of heat exchange tubes 6 are distributed along the extension direction of the shell 1, and the plurality of heat exchange tubes 6 are supported and fixed by heat conduction plates 5, and a plurality of heat conduction plates 5 are provided, and the plurality of heat conduction plates 5 are distributed at intervals along the extension direction of the shell 1, and the heat conduction plates 5 are connected to the outer wall of the heat exchange cavity 2, and a plurality of through holes 51 are provided on the heat conduction plate 5, one end of the heat exchange tube 6 is connected to the feed chamber 11, and the other end passes through the through hole 51 and is connected to the discharge chamber 12.

[0029] In the embodiment, the shell 1 is horizontally arranged in a cylindrical structure, in order to increase the heat exchange efficiency of the heat exchange pipe 6, the horizontal length of the shell 1 is as long as possible according to the actual production site, since the shell 1 is horizontally arranged, the problem of occupying space caused by the high traditional reaction furnace is avoided; the methanol hydrogen production catalyst is filled on the inner wall of the heat exchange pipe 6, when hydrogen production is needed, the preheated methanol solution enters the inside of the feed chamber 11 through the feed pipe 7, and then the methanol solution enters the inside of the heat exchange pipe 6 and reacts with the methanol hydrogen production catalyst to produce hydrogen gas and carbon dioxide gas with a large amount of heat, the hydrogen gas with heat enters the discharge chamber 12 along the heat exchange pipe 6, and finally is discharged from the discharge pipe 8 into the next process, in order to achieve the purpose of heat exchange, the oil pump injects the heat conducting oil into the heat exchange cavity 2 through the oil inlet pipe 3, at this time, the heat exchange pipe 6 has hydrogen gas with a large amount of heat, the heat is transferred to the heat conducting plate 5 through the heat exchange pipe 6, the heat conducting plate 5 transfers the heat to the outer wall of the heat exchange cavity 2, at this time, the heat conducting oil in the heat exchange cavity 2 is heated, and the heat also fills in the inside of the shell 1, at this time, the remaining heat also conducts heat to the outer wall of the heat exchange cavity 2, the heated heat conducting oil flows out of the oil outlet pipe 4 under the action of the oil pump, at this time, the heat conducting oil has a large amount of heat, the oil pump transfers the heat conducting oil with heat to the outside of the box body containing the methanol solution to heat the methanol for preheating, the preheated heat conducting oil is cooled, and then reenters the heat exchange cavity 2 through the oil pump for heating, this link not only realizes the recycling of the heat conducting oil, but also preheats the methanol solution before reaction by using the heat of the hydrogen gas, thereby saving cost. A plurality of through holes 51 distributed in a matrix are formed on the heat conducting plate 5, the heat exchange pipe 6 penetrates the through holes 51, the heat conducting plate 5 is connected with the heat exchange cavity 2, the heat conducting plate 5 not only has the function of supporting and stabilizing the heat exchange pipe 6, but also further transfers the heat on the heat exchange pipe 6 to the outer wall of the heat exchange cavity 2, and there are a plurality of heat exchange pipes 6 on the heat conducting plate 5, so that a large amount of heat can be transferred at the same time, thereby avoiding the problem of low heat transfer efficiency.

[0030] Further, please refer to Figure 3 , one end of the shell 1 is provided with the oil inlet pipe 3, and the other end is provided with the oil outlet pipe 4, the oil inlet pipe 3 and the oil outlet pipe 4 are both connected with the inside space of the heat exchange cavity 2.

[0031] In this embodiment, in order to achieve the purpose of heat exchange, the oil pump will inject heat transfer oil into the heat exchange chamber 2 through the oil inlet pipe 3. At this time, there is hydrogen with a large amount of heat inside the heat exchange tube 6. The heat will be transferred to the heat conduction plate 5 through the heat exchange tube 6. The heat conduction plate 5 will transfer the heat to the outer wall of the heat exchange chamber 2. At this time, the heat transfer oil inside the heat exchange chamber 2 will be heated. The heated heat transfer oil will flow out from the oil outlet pipe 4 under the action of the oil pump. At this time, the heat transfer oil carries a large amount of heat. The oil pump transfers the heat transfer oil to the outside of the box containing methanol solution to heat the methanol for preheating. After preheating, the heat transfer oil will cool down, and then the oil pump will re-enter the heat exchange chamber 2 for heating. This link not only realizes the recycling of the heat transfer oil, but also uses the heat of hydrogen to preheat the methanol solution before the reaction, saving costs.

[0032] For further information, see Figure 3 The oil inlet pipe 3 and the oil outlet pipe 4 are relatively distributed at the top and bottom of the shell 1.

[0033] In this embodiment, the oil inlet pipe 3 can be located at the bottom of the shell 1, and the oil outlet pipe 4 can be located at the top of the shell 1, and the oil inlet pipe 3 and oil outlet pipe 4 can be located at both ends of the shell 1. This ensures that the heat transfer oil fills the interior of the heat exchange chamber 2. In this case, the heat transfer plate 5 is located on the entire outer wall of the heat exchange chamber 2. The area of ​​the heat transfer oil in the heat exchange chamber 2 is increased, and the amount of heat absorbed by the heat transfer oil also increases accordingly, facilitating rapid heat absorption by the heat transfer oil and improving heat exchange efficiency. In another embodiment, the oil inlet pipe 3 can be located at the top of the shell 1, and the oil outlet pipe 4 can be located at the bottom of the shell 1, and the oil inlet pipe 3 and oil outlet pipe 4 can be located at both ends of the shell 1. The operating principle is the same.

[0034] For further information, see Figure 1 A feed pipe 7 and a discharge pipe 8 are provided on the outer wall of the shell 1. The feed pipe 7 is connected to the internal space of the feed chamber 11, and the discharge pipe 8 is connected to the internal space of the discharge chamber 12.

[0035] In this embodiment, when hydrogen production is required, the preheated methanol solution enters the feed chamber 11 through the feed pipe 7, and then the methanol solution enters the heat exchange tube 6 to react with the methanol hydrogen production catalyst to produce hydrogen and carbon dioxide gas with a large amount of heat. The hydrogen and carbon dioxide gas with heat will enter the discharge chamber 12 along the heat exchange tube 6, and finally be discharged from the discharge pipe 8 to enter the next process.

[0036] For further information, see Figure 1 The feed pipe 7 is located at the top of the shell 1 , and the discharge pipe 8 is located at the end surface of the shell 1 away from the feed pipe 7 .

[0037] In the embodiment, the feeding pipe 7 is located at the top of the shell 1, so that the methanol solution fills the whole feeding chamber 11 and enters the heat exchange pipe 6; the discharging pipe 8 is located at the end face of the shell 1 far from the feeding pipe 7, so that the generated hydrogen and carbon dioxide gas can be discharged.

[0038] Further, please refer to Figure 1 The bottom of the shell 1 is provided with two oppositely distributed supporting legs 9.

[0039] In the embodiment, the two oppositely distributed supporting legs 9 serve to support and stabilize the shell 1.

[0040] The working principle and use process of the utility model are as follows: the shell 1 is horizontally arranged in a cylindrical structure, in order to increase the heat exchange efficiency of the heat exchange pipe 6, the horizontal length of the shell 1 is as long as possible according to the actual production site, since the shell 1 is horizontally arranged, the problem of occupying space caused by the high traditional reaction furnace is avoided; the methanol hydrogen production catalyst is filled on the inner wall of the heat exchange pipe 6, when hydrogen production is needed, the preheated methanol solution enters the feeding chamber 11 through the feeding pipe 7, and then the methanol solution enters the heat exchange pipe 6 to react with the methanol hydrogen production catalyst to generate hydrogen and carbon dioxide gas with a large amount of heat, the hydrogen with heat enters the discharging chamber 12 along the heat exchange pipe 6, and finally is discharged from the discharging pipe 8 to enter the next process, in order to achieve the heat exchange purpose, the oil pump injects the heat conducting oil into the heat exchange cavity 2 through the oil inlet pipe 3, at this time, the heat exchange pipe 6 is filled with hydrogen with a large amount of heat, the heat is transferred to the heat conducting plate 5 through the heat exchange pipe 6, the heat conducting plate 5 transfers the heat to the outer wall of the heat exchange cavity 2, at this time, the heat conducting oil in the heat exchange cavity 2 is heated, and the heat also fills in the shell 1, at this time, the remaining heat also conducts heat to the outer wall of the heat exchange cavity 2, the heated heat conducting oil flows out of the oil outlet pipe 4 under the action of the oil pump, at this time, the heat conducting oil has a large amount of heat, the oil pump transfers the heat conducting oil with heat to the outside of the box containing the methanol solution to heat the methanol, the heat conducting oil after preheating is cooled, and then the oil pump reenters the heat exchange cavity 2 to be heated, this link not only realizes the recycling of the heat conducting oil, but also uses the heat of the hydrogen to preheat the methanol before reaction, thereby saving the cost.

[0041] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A heat exchanger for methanol to hydrogen production, characterized by: comprising a housing (1); The shell (1) is a horizontally arranged cylindrical structure, and a feed chamber (11) and a discharge chamber (12) are respectively provided at both ends of the shell (1); A heat exchange cavity (2) is provided on the inner wall of the shell (1), and a plurality of heat exchange tubes (6) are provided inside the shell (1). The plurality of heat exchange tubes (6) are distributed along the extension direction of the shell (1), and the plurality of heat exchange tubes (6) are supported and fixed by a heat conduction plate (5). The plurality of heat conduction plates (5) are provided, and the plurality of heat conduction plates (5) are distributed at intervals along the extension direction of the shell (1). The heat conduction plate (5) is connected to the outer wall of the heat exchange cavity (2), and a plurality of through holes (51) are provided on the heat conduction plate (5). One end of the heat exchange tube (6) is connected to the feed chamber (11), and the other end passes through the through hole (51) and is connected to the discharge chamber (12).

2. A heat exchanger for producing hydrogen from methanol according to claim 1, characterized in that: An oil inlet pipe (3) is provided at one end of the shell (1), and an oil outlet pipe (4) is provided at the other end; both the oil inlet pipe (3) and the oil outlet pipe (4) are connected to the internal space of the heat exchange chamber (2).

3. A heat exchanger for producing hydrogen from methanol according to claim 2, characterized in that: The oil inlet pipe (3) and the oil outlet pipe (4) are relatively distributed at the top and bottom of the shell (1).

4. A heat exchanger for producing hydrogen from methanol according to claim 1, characterized in that: A feed pipe (7) and a discharge pipe (8) are provided on the outer wall of the shell (1); the feed pipe (7) is connected to the internal space of the feed chamber (11); and the discharge pipe (8) is connected to the internal space of the discharge chamber (12).

5. A heat exchanger for producing hydrogen from methanol according to claim 4, characterized in that: The feed pipe (7) is located at the top of the shell (1), and the discharge pipe (8) is located at an end surface of the shell (1) away from the feed pipe (7).

6. The heat exchanger for producing hydrogen from methanol according to claim 1, characterized in that: The bottom of the housing (1) is provided with two supporting legs (9) that are distributed opposite to each other.

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