2-methyl furan reactor capable of recycling heat

Abstract

The utility model discloses a 2-methyl furan reactor capable of recycling heat, and relates to the related technical field of 2-methyl furan production. The device comprises a tubular fixed bed reactor, material cavities, a water bath heater and a material conveying assembly, the material cavities are fixed at the top end and the bottom end of the tubular fixed bed reactor, the water bath heater is arranged on one side of the tubular fixed bed reactor, and the material conveying assembly is fixed in the water bath heater. The end, away from the water bath heater, of the hot water pipe communicates with the output end of the tubular fixed bed reactor, the upper end of the evaporation pipe fixedly communicates with a three-way pipe, and the top end of the vertical part of the three-way pipe fixedly communicates with a first mixing pipe. The tubular fixed bed reactor, the material cavity, the water bath heater and the material conveying assembly are arranged, so that the problems that reaction heat is not sufficiently utilized in the production of gas-phase 2-methyl furan, hydrogen is not uniformly and sufficiently mixed, the hydrogen needs to be additionally heated, and the product yield is influenced are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to 2-methylfuran production, in particular to a 2-methylfuran reactor with heat recycling. Background Art

[0002] The production process of 2-methylfuran using a gas-phase reactor usually involves the catalytic hydrogenation reaction of furfural. In this process, furfural, as a raw material, reacts chemically with hydrogen in the gas phase under the action of a catalyst to convert it into 2-methylfuran. This reaction is usually carried out in a fixed-bed reactor and can be carried out under normal pressure or low pressure conditions. It is usually an exothermic reaction, but it still has the following disadvantages in actual use:

[0003] The production of gaseous 2-methylfuran uses a fixed-bed reactor with tubular components. Hot water in the reactor's interlayer removes the heat of reaction from furfural hydrogenation to 2-methylfuran, maintaining a stable reaction. Steam is produced as a by-product during the production process, and to better control the temperature, hot water is regularly drained, which can easily lead to heat waste.

[0004] During operation, hydrogen and furfural usually need to be heated and gasified, and then transported to a fixed-bed reactor for further mixing and convection, so that furfural and hydrogen react to produce 2-methylfuran. Since hydrogen is mixed directly in the reactor, the hydrogen is not mixed evenly, and the hydrogen needs to be additionally heated during operation, resulting in insufficient reaction during the production process, affecting the yield of 2-methylfuran. Utility Model Content

[0005] The utility model aims to provide a 2-methylfuran reactor with heat recycling. By arranging a tubular fixed-bed reactor, a material chamber, a water bath heater and a material conveying assembly, the utility model solves the problems of insufficient reaction heat utilization and insufficient and uniform mixing of hydrogen in gas-phase 2-methylfuran production, which requires additional heating of the hydrogen and affects the product yield.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model discloses a 2-methylfuran reactor for heat recycling, comprising a tubular fixed bed reactor, a material cavity, a water bath heater and a feeding assembly. The top and bottom ends of the tubular fixed bed reactor are both fixed with material cavities, and the two material cavities are symmetrical to each other. A water bath heater is provided on one side of the tubular fixed bed reactor, and a feeding assembly is fixed in the water bath heater. A hot water pipe is fixedly connected to the upper part of the water bath heater close to the tubular fixed bed reactor, and one end of the hot water pipe away from the water bath heater is connected to the output end of the tubular fixed bed reactor. The feeding assembly comprises an evaporation tube, a tee pipe and a mixing tube. The evaporation tube and the mixing tube are both S-shaped. The evaporation tube is arranged in a shape, the end portion located at the upper part is fixedly connected with a tee pipe, and the top end of the vertical portion of the tee pipe is fixedly connected with a mixing pipe 1. During operation, the furfural and hydrogen passing therethrough are catalytically reacted to generate 2-methylfuran through the tubular fixed bed reactor, and the furfural and hydrogen mixture is transported through the material cavity to irritate the tubular fixed bed reactor. After the reaction in the tubular fixed bed reactor is completed, the generated mixture is transported to the material cavity at the top end of the tubular fixed bed reactor, the furfural and hydrogen passing through the feeding component are heated by a water bath heater, and the furfural is gasified, the furfural is transported through the feeding component to the water bath heater for heating, and the hydrogen is mixed and output to the external reaction equipment.

[0008] Furthermore, the material cavity is evenly provided with feed holes at one end close to the tubular fixed bed reactor, and the material cavity is fixedly connected to the feed pipe at one end away from the tubular fixed bed reactor, and the material cavity is connected to the feed pipe through the feed holes.

[0009] Furthermore, reaction tubes are uniformly and vertically fixed in the tube-fixed bed reactor, and the reaction tubes correspond to the positions of the feed holes. The tube-fixed bed reactor fixes the catalyst therein through the reaction tubes to catalyze the mixture of furfural and hydrogen.

[0010] Furthermore, a circulation pump is fixed to the lower part of one side of the water bath heater close to the tubular fixed bed reactor, the input end of the circulation pump is connected to the water bath heater, and the output end of the circulation pump is fixedly connected to a circulation pipe. The water in the water bath heater is pumped out by the circulation pump and transported to the tubular fixed bed reactor.

[0011] Furthermore, one end of the circulation pipe away from the circulation pump is fixedly connected to the input end of the tube-in-tube fixed bed reactor, and the middle part of the circumference of the circulation pipe is fixedly connected to a water supply pipe, and the circulation pipe is connected to the tube-in-tube fixed bed reactor through the water supply pipe.

[0012] Furthermore, the feeding assembly also includes a furfural tube and a second mixing tube. The end of the evaporation tube located at the lower part is fixedly connected to the furfural tube, and the furfural tube is fixed in the water bath heater. The end of the mixing tube one located at the upper part is fixedly connected to the second mixing tube, and the second mixing tube is fixed on the top of the water bath heater. The end of the mixing tube away from the water bath heater is fixedly connected to the bottom end of the feeding tube in the material chamber at the bottom end of the tube fixed bed reactor. The furfural is transported to the evaporation tube through the furfural tube, and the furfural is evaporated through the evaporation tube. After the evaporated furfural and hydrogen are mixed in the three-way pipe, they are transported to the mixing tube one, and then transported to the mixing tube two through the mixing tube one.

[0013] Furthermore, the feeding assembly also includes a gas flow meter and an electric control valve. The horizontal portion of the tee is fixed on the side of the water bath heater. The gas flow meter and the electric control valve are fixed around the portion of the tee extending from the side of the water bath heater. The gas flow meter is arranged between the electric control valve and the water bath heater. The tee cooperates with the electric control valve and the gas flow meter to control the flow rate of hydrogen delivered to the vertical portion of the tee.

[0014] The utility model has the following beneficial effects:

[0015] The utility model solves the problem of insufficient utilization of reaction heat in gas phase-methylfuran production by arranging a tubular fixed bed reactor and a water bath heater. During operation, a portion of heat generated by the tubular fixed bed reactor is taken away by water passing therethrough, and hot water in the tubular fixed bed reactor is transported to the water bath heater through a hot water pipe. After hydrogen and furfural are heated in the water bath heater, water therein is pumped out into a circulation pipe by a circulation pump, and circulated to the tubular fixed bed reactor through the circulation pipe. The reaction heat in the tubular fixed bed reactor is absorbed by the water and then transported to the hot water pipe for water circulation. While the reactants are cooled, the heat released by the reaction of furfural and hydrogen is circulated, thereby reducing heat waste and making more full use of the reaction heat in gas phase-methylfuran production.

[0016] The utility model solves the problem that hydrogen mixing in gas phase-methyl furan production is not uniform and sufficient, and the hydrogen needs to be additionally heated, which affects the yield of the product by arranging a tubular fixed bed reactor, a material chamber, a water bath heater and a material feeding assembly. The furfural is transferred to the evaporation tube through the furfural tube, and then transferred to the vertical part of the tee pipe in the evaporation tube. The end of the horizontal part of the tee pipe is connected to the pipeline for conveying hydrogen, so that the hydrogen is transported to the vertical part of the tee pipe and mixed with the furfural that has been gasified after passing through the vertical part of the tee pipe. , and then transported to mixing tube one, heated in a water bath while being mixed, and transported to mixing tube two, and then transported to the bottom end of the material delivery pipe in the material cavity at the bottom end of the tubular fixed bed reactor through mixing tube two, and contacted with the furfural tube, evaporation tube, tee pipe and mixing tube one through hot water in the water bath heater, so that the furfural is fully heated and evaporated, and the hydrogen and furfural are fully mixed, and are fully preheated and mixed through mixing tube one, so that the hydrogen mixing in the gas phase-methylfuran production is more uniform and sufficient, without the need to additionally heat the hydrogen, thereby increasing the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A perspective view of the assembly structure of a 2-methylfuran reactor for heat recycling;

[0019] Figure 2 This is a three-dimensional diagram of the structure of a tubular fixed bed reactor;

[0020] Figure 3 It is a three-dimensional diagram of the material cavity structure;

[0021] Figure 4 It is a three-dimensional diagram of the water bath heater structure;

[0022] Figure 5 It is a three-dimensional diagram of the feeding component structure.

[0023] Reference numerals:

[0024] 1. Tubular fixed-bed reactor; 101. Reaction tubes; 2. Material chamber; 201. Feed hole; 202. Feed pipe; 3. Water bath heater; 301. Hot water pipe; 302. Circulation pump; 303. Circulation pipe; 304. Water supply pipe; 4. Feed assembly; 401. Furfural pipe; 402. Evaporation pipe; 403. Tee; 404. Gas flowmeter; 405. Electric control valve; 406. Mixing pipe 1; 407. Mixing pipe 2. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Specific embodiment 1

[0026] See also Figure 1-4 The utility model is a 2-methylfuran reactor with heat recycling, comprising a tubular fixed bed reactor 1, a material chamber 2, a water bath heater 3 and a feeding assembly 4. The material chamber 2 is fixed at the top and bottom of the tubular fixed bed reactor 1, and the two material chambers 2 are symmetrical to each other. When the tubular fixed bed reactor 1 is working, the furfural and hydrogen passing therethrough react to generate 2-methylfuran, and the materials before and after the reaction are transferred through the material chamber 2. A water bath heater 3 is provided on one side of the tubular fixed bed reactor 1, and the furfural and hydrogen passing through the feeding assembly 4 are heated by the water bath heater 3, and the furfural is gasified. A feeding assembly 4 is fixed in the water bath heater 3, and the furfural is transported through the feeding assembly 4 to be gasified through the water bath heater 3, and the hydrogen and furfural are mixed. A hot water pipe 301 is fixedly connected to the upper part of the water bath heater 3 near one side of the tubular fixed bed reactor 1, and the end of the hot water pipe 301 away from the water bath heater 3 is connected to the tubular fixed bed reactor 1. The output end of the tube fixed bed reactor 1 is connected, and the hot water cooled by the reaction in the tube fixed bed reactor 1 is transported to the water bath heater 3 through the hot water pipe 301, heating the transported furfural and hydrogen and gasifying the furfural. The feeding assembly 4 includes an evaporation tube 402, a tee 403 and a mixing tube 1 406. The evaporation tube 402 and the mixing tube 1 406 are both arranged in an S shape. The upper end of the evaporation tube 402 is fixedly connected to the tee 403, and the top of the vertical part of the tee 403 is fixedly connected to the mixing tube 1 406. The furfural entering the evaporation tube 402 is heated by the hot water in the water bath heater 3 and then evaporated and gasified. It is then transported to the tee 403, mixed with the hydrogen entering the tee 403, and enters the mixing tube 1 406 for preliminary mixing. It is preheated by water bath heating and transported to the mixing tube 2 407. The tube fixed bed reactor 1 and the water bath heater 3 are both supported on an external support structure during operation.

[0027] Specifically, the material chamber 2 is evenly provided with feed holes 201 at one end close to the tubular fixed bed reactor 1, and the material chamber 2 is fixedly connected to the end away from the tubular fixed bed reactor 1 with a feed pipe 202. The material chamber 2 is connected to the reaction tubulars 101 in the tubular fixed reactor through the feed holes 201, and materials before and after the reaction enter and exit the material chamber 2 through the feed pipe 202.

[0028] Furthermore, reaction tubes 101 are uniformly and vertically fixed in the tube-fixed bed reactor 1, and the reaction tubes 101 correspond to the positions of the feed holes 201. The tube-fixed bed reactor 1 fixes the breathable catalyst used for the reaction therein through the reaction tubes 101, and catalyzes the reaction of furfural and hydrogen to produce 2-methylfuran when the furfural and hydrogen pass through.

[0029] Furthermore, a circulation pump 302 is fixed to the lower part of one side of the water bath heater 3 close to the shell and tube fixed bed reactor 1. The input end of the circulation pump 302 is connected to the water bath heater 3, and the output end of the circulation pump 302 is fixedly connected to a circulation pipe 303. When the water bath heater 3 is working, the water therein is pumped out into the circulation pipe 303 by the circulation pump 302, and circulated into the shell and tube fixed bed reactor 1 through the circulation pipe 303, so that the reaction heat in the shell and tube fixed bed reactor 1 is absorbed by the water and then transported to the hot water pipe 301.

[0030] The operation process of this embodiment is as follows: when working, after furfural and hydrogen are mixed and transported from the material pipe located below to the material chamber 2, they are transported in the material chamber 2 to the reaction tube 101 in the tube fixed bed reactor 1, and after catalytic reaction by the catalyst in the reaction tube 101, they are transported to the material chamber 2 located above, and transported to the feed pipe 202 through the material chamber 2, and output to the external separation and purification equipment through the feed pipe 202. During the working process, the heat generated by the tube fixed bed reactor 1 is partially taken away by the water passing through it. The hot water in the tubular fixed-bed reactor 1 is transported to the water bath heater 3 through the hot water pipe 301. After heating hydrogen and furfural in the water bath heater 3, the water therein is pumped out by the circulation pump 302 and is transferred to the circulation pipe 303. The water is circulated and transported to the tubular fixed-bed reactor 1 through the circulation pipe 303. After the reaction heat in the tubular fixed-bed reactor 1 is absorbed by the water, it is transported to the hot water pipe 301 for water circulation. While cooling the reactants, the heat released by the reaction of furfural and hydrogen is recycled to reduce heat waste. Specific embodiment 2

[0031] See also Figure 1 、 2 , 4, 5. On the basis of the specific embodiment 1, one end of the circulation pipe 303 away from the circulation pump 302 is fixedly connected to the input end of the tubular fixed bed reactor 1, and the middle part of the circumference of the circulation pipe 303 is fixedly connected to the water adding pipe 304. The circulation pipe 303 is connected to the input end of the tubular fixed bed reactor 1, so that the water pumped by the circulation pump 302 is transported to the tubular fixed bed reactor 1, and the tubular fixed bed reactor 1 and the water bath heater 3 are heated through the water adding pipe 304.

[0032] Specifically, the feeding component 4 also includes a furfural tube 401 and a mixing tube 2 407. The end of the evaporation tube 402 at the lower part is fixedly connected to the furfural tube 401, and the furfural tube 401 is fixed in the water bath heater 3. The end of the mixing tube 1 406 at the upper part is fixedly connected to the mixing tube 2 407, and the mixing tube 2 407 is fixed on the top of the water bath heater 3. The end of the mixing tube away from the water bath heater 3 is fixedly connected to the bottom end of the feeding tube 202 on the material chamber 2 at the bottom end of the tubular fixed bed reactor 1. The end of the furfural tube 401 away from the evaporation tube 402 is connected to the pipeline for conveying furfural, and the furfural is transferred to the evaporation tube 402 through the furfural tube 401.

[0033] Furthermore, the feeding assembly 4 also includes a gas flow meter 404 and an electric control valve 405. The horizontal portion of the tee pipe 403 is fixed on the side of the water bath heater 3. The gas flow meter 404 and the electric control valve 405 are fixed around the part of the tee pipe 403 extending out of the side of the water bath heater 3. The gas flow meter 404 is arranged between the electric control valve 405 and the water bath heater 3. The end of the horizontal portion of the tee pipe 403 is connected to the pipeline for conveying hydrogen, so that the hydrogen is conveyed to the vertical portion of the tee pipe 403, mixed with the gasified furfural passing through the vertical portion of the tee pipe 403, and then conveyed to the mixing tube 1 406 after mixing. While mixing, it is heated in the water bath and conveyed to the mixing tube 2 407, and then conveyed to the bottom end of the feeding pipe 202 on the material chamber 2 at the bottom end of the tubular fixed bed reactor 1 through the mixing tube 2 407, so that the hydrogen and furfural gases can be more fully mixed before entering the tubular fixed bed reactor 1.

[0034] The operation process of this embodiment is as follows: during operation, the end of the furfural tube 401 away from the evaporation tube 402 is connected to the pipeline for conveying furfural, and the furfural is transferred to the evaporation tube 402 through the furfural tube 401, and then transferred to the vertical part of the tee pipe 403 in the evaporation tube 402. The end of the horizontal part of the tee pipe 403 is connected to the pipeline for conveying hydrogen, so that the hydrogen is conveyed to the vertical part of the tee pipe 403, mixed with the gasified furfural passing through the vertical part of the tee pipe 403, and then conveyed to the mixing tube 1 406 after mixing. While mixing, it is heated in a water bath and conveyed to the mixing tube 2 407, and then conveyed to the bottom end of the feed pipe 202 on the material chamber 2 at the bottom end of the tubular fixed bed reactor 1 through the mixing tube 2 407. The hot water in the water bath heater 3 contacts the furfural tube 401, the evaporation tube 402, the tee pipe 403 and the mixing tube 1 406, so that the furfural is fully heated and evaporated, and the hydrogen and furfural are fully mixed.

[0035] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A 2-methylfuran reactor with heat recycling, comprising a tubular fixed bed reactor (1), a material chamber (2), a water bath heater (3) and a material feeding assembly (4), characterized in that: A material chamber (2) is fixed at both the top and bottom ends of the tubular fixed bed reactor (1), and the two material chambers (2) are symmetrical to each other. A water bath heater (3) is provided on one side of the tubular fixed bed reactor (1), and a material feeding assembly (4) is fixed in the water bath heater (3). The upper portion of the water bath heater (3) close to the tubular fixed bed reactor (1) is fixedly connected to a hot water pipe (301), and the end of the hot water pipe (301) away from the water bath heater (3) is connected to the output end of the tubular fixed bed reactor (1). The material feeding assembly (4) includes an evaporation tube (402), a tee (403) and a mixing tube (406). The evaporation tube (402) and the mixing tube (406) are both arranged in an S shape. The upper end of the evaporation tube (402) is fixedly connected to the tee (403), and the top of the vertical portion of the tee (403) is fixedly connected to the mixing tube (406).

2. A 2-methylfuran reactor for heat recycling according to claim 1, characterized in that: The material cavity (2) has material delivery holes (201) evenly formed at one end close to the tubular fixed bed reactor (1), and the material cavity (2) has a material delivery pipe (202) fixedly connected to one end away from the tubular fixed bed reactor (1).

3. A 2-methylfuran reactor for heat recycling according to claim 2, characterized in that: Reaction tubes (101) are uniformly and vertically fixed in the tube fixed bed reactor (1), and the positions of the reaction tubes (101) and the material delivery holes (201) correspond to each other.

4. The 2-methylfuran reactor for heat recycling according to claim 1, wherein: A circulation pump (302) is fixed to the lower portion of one side of the water bath heater (3) close to the tubular fixed bed reactor (1), the input end of the circulation pump (302) is connected to the water bath heater (3), and the output end of the circulation pump (302) is fixedly connected to a circulation pipe (303).

5. A 2-methylfuran reactor for heat recycling according to claim 4, characterized in that: One end of the circulation pipe (303) away from the circulation pump (302) is fixedly connected to the input end of the tube-in-tube fixed-bed reactor (1), and the middle portion of the circumference of the circulation pipe (303) is fixedly connected to a water supply pipe (304).

6. A 2-methylfuran reactor for heat recycling according to claim 1, characterized in that: The feeding assembly (4) further includes a furfural tube (401) and a second mixing tube (407). The end portion of the evaporation tube (402) located at the lower portion is fixedly connected to the furfural tube (401). The furfural tube (401) is fixedly connected to the water bath heater (3). The end portion of the first mixing tube (406) located at the upper portion is fixedly connected to the second mixing tube (407). The second mixing tube (407) is fixedly connected to the top of the water bath heater (3). The end of the mixing tube away from the water bath heater (3) is fixedly connected to the bottom end of the feeding tube (202) on the material chamber (2) at the bottom end of the tubular fixed bed reactor (1).

7. The 2-methylfuran reactor with heat recycling according to claim 1, characterized in that: The feeding assembly (4) further comprises a gas flow meter (404) and an electric control valve (405); the horizontal portion of the three-way pipe (403) is fixed through the side of the water bath heater (3); the gas flow meter (404) and the electric control valve (405) are fixed around the portion of the three-way pipe (403) extending out of the side of the water bath heater (3); the gas flow meter (404) is arranged between the electric control valve (405) and the water bath heater (3).

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