Amination fixed bed reaction equipment

Abstract

The utility model relates to the technical field of amination fixed bed reaction, and discloses amination fixed bed reaction equipment, which comprises a fixed bed reactor used for synthesizing an organic amine compound; the hydrogen storage tank is connected with the fixed bed reactor, and the hydrogen storage tank is used for conveying hydrogen into the fixed bed reactor; the recycling mechanism is connected with the fixed bed reactor, a loop is formed between the recycling mechanism and the fixed bed reactor, and the recycling mechanism is used for recycling hydrogen; the emptying channel is connected with the recovery mechanism, the recovery mechanism comprises a plate heat exchanger, the plate heat exchanger is connected with the fixed bed reactor, and the plate heat exchanger is used for efficient heat exchange; the cold trap is connected with the plate heat exchanger, and the cold trap is used for separating and collecting hydrogen; and the gas-liquid separator is connected with the cold trap. According to the device disclosed by the utility model, hydrogen can be conveniently recycled, and waste heat generated in an amination reaction period can also be recycled.

Description

Technical Field

[0001] The utility model relates to the technical field of amination fixed bed reaction, in particular to amination fixed bed reaction equipment. Background Art

[0002] Amination fixed bed reaction equipment is a device used for the industrial synthesis of organic amine compounds. Its principle is to allow substrates containing hydroxyl and carbonyl groups to react with liquid ammonia or compounds containing amino functional groups through a catalyst in a fixed bed to generate amine compounds.

[0003] Currently, fixed-bed catalysts are typically highly efficient amination catalysts. Typically, the catalyst is first loaded into a fixed-bed reactor and activated by introducing hydrogen at high temperature before being put into formal use. The hydrogen activation method generally involves filling the reactor with an appropriate amount of hydrogen, heating it to the activation temperature for a period of time, and then venting the hydrogen, repeating this process several times. However, the inventors have discovered in actual applications that a large amount of hydrogen needs to be continuously replenished during the hydrogen activation period, resulting in significant costs. Therefore, the inventors have proposed a fixed-bed amination reaction apparatus. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides an amination fixed-bed reaction equipment, which has the advantages of convenient hydrogen recovery and recovery of waste heat generated during the amination reaction, and solves the problem of the need to continuously replenish a large amount of hydrogen during hydrogen activation, which is costly.

[0005] In order to achieve the above-mentioned purpose of conveniently recycling hydrogen and recycling the waste heat generated during the amination reaction, the utility model provides the following technical solution: an amination fixed-bed reaction device, comprising: a fixed-bed reactor, the fixed-bed reactor being used for synthesizing an organic amine compound;

[0006] A hydrogen storage tank, the hydrogen storage tank being connected to the fixed bed reactor and being used to transport hydrogen to the fixed bed reactor;

[0007] a recovery mechanism, the recovery mechanism being connected to the fixed bed reactor to form a loop therebetween, and the recovery mechanism being used to recycle hydrogen;

[0008] A venting channel is connected to the recovery mechanism.

[0009] As a preferred technical solution of the present invention, the recovery mechanism includes: a plate heat exchanger, the plate heat exchanger is connected to the fixed bed reactor, and the plate heat exchanger is used for efficient heat exchange;

[0010] A cold trap, connected to the plate heat exchanger, and used to separate and collect hydrogen;

[0011] A gas-liquid separator, the gas-liquid separator being connected to the cold trap and used for separating hydrogen in different phases;

[0012] A compressor, connected to the gas-liquid separator, and used for compressing hydrogen;

[0013] A drying tower is connected to the compressor and the plate heat exchanger. The drying tower is used to remove moisture from the hydrogen. In actual application, the tail gas (containing unreacted hydrogen) discharged from the output end of the fixed bed reactor is subjected to heat exchange through the plate heat exchanger, the cold trap is used to separate and collect the gas and liquid phases of hydrogen, the gas-liquid separator is used to separate the hydrogen in different phases, the compressor is used to compress the hydrogen, and the drying tower is used to remove moisture from the hydrogen. The hydrogen with moisture removed is then transported back to the catalyst fixed bed layer in the fixed bed reactor through the plate heat exchanger for recycling, so as to achieve the effect of recycling the unreacted hydrogen in the tail gas, thereby facilitating the recycling of the hydrogen in the tail gas.

[0014] As a preferred technical solution of the present invention, the compressor is a reciprocating compressor. By setting the inlet pressure of the compressor higher than the atmospheric pressure, air can be prevented from entering the recovery mechanism and safety risks can be avoided.

[0015] As a preferred technical solution of the present invention, the drying tower is connected to the venting channel and is internally provided with an adsorbent for dehydration to facilitate the discharge of tail gas generated by the drying tower.

[0016] As an optimal technical solution of the present invention, the adsorbent is one of alumina, molecular sieve, activated carbon, iron-based adsorbent and nickel-based adsorbent. Different types of adsorbents are set, and different types can be customized according to different scenarios. It has a wide range of applications and is easy to use.

[0017] Compared with the prior art, the present invention provides a fixed-bed amination reaction device with the following beneficial effects:

[0018] 1. The amination fixed-bed reaction equipment realizes the recovery of unreacted hydrogen in the tail gas (containing unreacted hydrogen) discharged from the output end of the fixed-bed reactor by passing the tail gas (containing unreacted hydrogen) through a plate heat exchanger, separating and collecting gaseous and liquid hydrogen through a cold trap, separating hydrogen in different phases through a gas-liquid separator, compressing the hydrogen through a compressor, and removing moisture from the hydrogen through a drying tower. The dehydrated hydrogen is then transported back to the catalyst fixed bed layer in the fixed-bed reactor through the plate heat exchanger for recycling, thereby achieving the effect of recycling unreacted hydrogen in the tail gas, thereby facilitating the recovery of hydrogen in the tail gas.

[0019] 2. The amination fixed-bed reaction equipment recovers and utilizes the waste heat of the tail gas generated during the amination reaction by exchanging heat with hydrogen recovered from a drying tower after removing moisture in a plate heat exchanger, thereby facilitating the recovery and utilization of the waste heat generated during the amination reaction.

[0020] 3. In the amination fixed-bed reaction equipment of the present invention, different types of adsorbents are arranged in the drying tower, and different types can be customized according to different scenarios. It has a wide range of applications and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the hydrogen recovery and utilization structure flow of the utility model.

[0022] In the figure: 1. Fixed bed reactor; 2. Hydrogen storage tank; 3. Recovery mechanism; 31. Plate heat exchanger; 32. Cold trap; 33. Gas-liquid separator; 34. Compressor; 35. Drying tower; 4. Vent channel. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 , provides an amination fixed bed reaction device, comprising: a fixed bed reactor 1, the fixed bed reactor 1 is used to synthesize an organic amine compound;

[0025] A hydrogen storage tank 2 is connected to the fixed bed reactor 1 and is used to transport hydrogen to the fixed bed reactor 1;

[0026] Recovery mechanism 3, which is connected to the fixed bed reactor 1 and forms a loop between the two. Recovery mechanism 3 is used to recycle hydrogen;

[0027] The venting channel 4 is connected with the recovery mechanism 3.

[0028] The recovery mechanism 3 includes: a plate heat exchanger 31, which is connected to the fixed bed reactor 1 and is used for efficient heat exchange;

[0029] A cold trap 32 is connected to the plate heat exchanger 31 and is used to separate and collect hydrogen;

[0030] A gas-liquid separator 33 is connected to the cold trap 32 and is used to separate hydrogen in different phases;

[0031] Compressor 34, which is connected to the gas-liquid separator 33 and is used to compress hydrogen;

[0032] The drying tower 35 is connected to the compressor 34 and the plate heat exchanger 31. The drying tower 35 is used to remove moisture from the hydrogen. In actual application, the tail gas (containing unreacted hydrogen) discharged from the output end of the fixed bed reactor 1 is subjected to heat exchange through the plate heat exchanger 31, the cold trap 32 is used to separate and collect the gaseous and liquid phases of hydrogen, the gas-liquid separator 33 is used to separate the hydrogen in different phases, the compressor 34 is used to compress the hydrogen, and the drying tower 35 is used to remove moisture from the hydrogen. The hydrogen with moisture removed is then transported back to the catalyst fixed bed layer in the fixed bed reactor 1 through the plate heat exchanger 31 for recycling, so as to achieve the effect of recycling the unreacted hydrogen in the tail gas, thereby facilitating the recycling of the hydrogen in the tail gas.

[0033] The compressor 34 is a reciprocating compressor. In actual applications, the inlet pressure of the compressor 34 is higher than the atmospheric pressure to prevent air from entering the recovery mechanism 3 to avoid safety risks.

[0034] The drying tower 35 is connected to the venting channel 4 and is provided with an adsorbent for dehydration inside. The venting channel 4 is used to discharge the tail gas generated by the drying tower 35 so as to facilitate the discharge of the tail gas generated by the drying tower 35.

[0035] The adsorbent is one of alumina, molecular sieve, activated carbon, iron-based adsorbent and nickel-based adsorbent. Different types of adsorbents are set in the drying tower 35, and different types can be customized according to different scenarios. It has a wide range of applications and is easy to use.

[0036] In actual use, hydrogen is transported to the catalyst fixed bed layer in the fixed bed reactor 1 through the hydrogen storage tank 2, and then a high-temperature heat medium is introduced into the heat medium side of the fixed bed reactor 1. At this time, the amination reaction begins. During this period, the tail gas (containing unreacted hydrogen) discharged from the output end of the fixed bed reactor 1 is heat exchanged by the plate heat exchanger 31, the cold trap 32 is used to separate and collect the gas phase and liquid phase hydrogen, the gas-liquid separator 33 is used to separate the hydrogen in different phases, the compressor 34 is used to compress the hydrogen, and the drying tower 35 is used to remove the moisture in the hydrogen. At the same time, the hydrogen that has removed the moisture is removed. The exhaust gas is then transported back to the catalyst fixed bed layer in the fixed bed reactor 1 through the plate heat exchanger 31 for recycling. During this period, the waste heat of the tail gas generated during the amination reaction is heat exchanged with the recycled hydrogen to achieve the effects of recycling the unreacted hydrogen in the tail gas and recycling the waste heat of the tail gas generated during the amination reaction, thereby facilitating the recycling of the hydrogen in the tail gas and the recycling of the waste heat generated during the amination reaction. This device not only facilitates the recycling of hydrogen, but also can recycle the waste heat generated during the amination reaction.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. An amination fixed bed reaction equipment, characterized in that: include: A fixed bed reactor (1), wherein the fixed bed reactor (1) is used for synthesizing an organic amine compound; A hydrogen storage tank (2), the hydrogen storage tank (2) being connected to the fixed bed reactor (1), and the hydrogen storage tank (2) being used to transport hydrogen to the fixed bed reactor (1); A recovery mechanism (3), the recovery mechanism (3) is connected to the fixed bed reactor (1), and a loop is formed between the two, and the recovery mechanism (3) is used to recover and utilize hydrogen; A venting channel (4), wherein the venting channel (4) is connected to the recovery mechanism (3).

2. The amination fixed bed reaction equipment according to claim 1, characterized in that: The recovery mechanism (3) comprises: a plate heat exchanger (31), the plate heat exchanger (31) being connected to the fixed bed reactor (1), and the plate heat exchanger (31) being used for efficient heat exchange; A cold trap (32), the cold trap (32) being connected to the plate heat exchanger (31), and the cold trap (32) being used to separate and collect hydrogen; A gas-liquid separator (33), the gas-liquid separator (33) being connected to the cold trap (32), and the gas-liquid separator (33) being used to separate hydrogen in different phases; A compressor (34), the compressor (34) being connected to the gas-liquid separator (33), and the compressor (34) being used to compress hydrogen; A drying tower (35), the drying tower (35) is connected to the compressor (34) and the plate heat exchanger (31), and the drying tower (35) is used to remove moisture from the hydrogen.

3. The amination fixed bed reaction equipment according to claim 2, characterized in that: The compressor (34) is a reciprocating compressor.

4. The amination fixed bed reaction equipment according to claim 2, characterized in that: The drying tower (35) is connected to the venting channel (4) and is provided with an adsorbent for dehydration.

5. The amination fixed bed reaction equipment according to claim 4, characterized in that: The adsorbent is one of alumina, molecular sieve, activated carbon, iron-based adsorbent and nickel-based adsorbent.

Images