Biomass synthesis gas separation device

Abstract

The utility model provides a biomass synthesis gas separation device, which relates to the technical field of synthesis gas separation, and comprises a refrigeration module, a separation module and a gas supply module, the separation module comprises a separation tank, a separation outlet arranged on the separation tank, and a heat exchange coil and a streaming structure arranged in the separation tank, due to the arrangement of the streaming structure, a zigzag channel is formed in the separation tank; the gas supply module comprises an inflow pipe, one end of the zigzag channel is connected with the inflow pipe, the other end of the zigzag channel is connected with the separation outlet, and the heat exchange coil and the zigzag channel are arranged in a penetrating mode. Separation of biomass synthesis gas is achieved through different liquefaction temperatures of all gas components, the separation effect is more sufficient compared with a membrane separation method and an adsorption method, carbon monoxide, carbon dioxide and hydrogen obtained after separation are independently stored, convenient conditions are provided for subsequent chemical reaction synthesis of alcohol substances, and the reaction efficiency of the alcohol substances is also improved.

Description

Technical Field

[0001] This utility model relates to the field of syngas separation technology, and in particular to a biomass syngas separation device. Background Technology

[0002] Biomass produces syngas after combustion, which is then used to synthesize methanol in a reactor. Syngas is a mixed gas, and membrane separation and adsorption methods are generally used to separate the mixed gas. The disadvantage of membrane separation and adsorption methods is that they cannot achieve complete separation, but only increase the relative content of a certain gas, which affects the subsequent utilization of the gas. In view of the above defects, this application is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a biomass syngas separation device that solves the problem that current membrane separation and adsorption methods are insufficient for achieving adequate gas separation of mixed gases.

[0004] To address the aforementioned problems, this utility model provides a biomass syngas separation device, comprising a refrigeration module, a separation module, and a gas supply module. The separation module includes a separation tank, a separation outlet disposed on the separation tank, a heat exchange coil disposed within the separation tank, and a flow-around structure. The heat exchange coil exchanges heat with the refrigeration module, which brings the heat exchange coil to the required temperature. The flow-around structure creates a tortuous channel within the separation tank, increasing the flow distance of the syngas inside the tank. The gas supply module includes an inlet pipe. One end of the tortuous channel is connected to the inlet pipe, and the other end is connected to the separation outlet. The syngas enters the separation tank through the inlet pipe, is cooled by the heat exchange coil, and the liquid gas is discharged through the separation outlet. The heat exchange coil and the tortuous channel are interleaved, ensuring uniform cooling of the tortuous channel and allowing the gas to fully contact the heat exchange coil.

[0005] According to one embodiment of the present invention, the separation module further includes a separation monitoring thermometer, which is provided in several groups to measure the temperature of different areas in the separation tank.

[0006] Preferably, three sets of separation monitoring thermometers are set up, respectively located at the top, middle, and bottom of the separation tank.

[0007] According to one embodiment of the present invention, the separate monitoring thermometer is electrically connected to the refrigeration module, and the refrigeration module controls the operating power according to the temperature parameters.

[0008] According to one embodiment of the present invention, the gas supply module further includes a syngas storage tank, which is connected to a syngas main pipe. The syngas main pipe is used to connect to a biomass combustion device, and the inlet pipe is connected to the syngas storage tank.

[0009] According to one embodiment of the present invention, a return pipe is connected between the syngas storage tank and the separation tank, and an air pump is installed on the return pipe. The inlet pipe and the return pipe realize the circulation of gas, ensuring that the various components of the gas in the syngas storage tank are effectively separated.

[0010] According to one embodiment of the present invention, a syngas monitoring thermometer is provided at the inlet pipe to monitor the temperature of the syngas when it enters, and preferably is electrically connected to the refrigeration module.

[0011] According to one embodiment of the present invention, the refrigeration module includes a condenser, a compressor, an evaporator, and an expansion valve, and the heat exchange coil exchanges heat with the evaporator.

[0012] According to one embodiment of the present invention, the flow-around structure includes a plurality of flow-around plates, each flow-around plate being provided with flow holes, and the flow holes on adjacent flow-around plates being staggered.

[0013] According to one embodiment of the present invention, a sealing structure is provided at the contact position between the heat exchange coil and the flow plate.

[0014] According to one embodiment of the present invention, the inlet pipe is set at a height higher than the separation outlet, so that the liquid separation gas can flow out.

[0015] The beneficial effects of this invention are that by setting up a separation tank and incorporating heat exchange coils and a flow-around structure within it, the heat exchange efficiency is improved. The synthesis gas and cryogenic liquid exchange heat, utilizing the different liquefaction temperatures of each gas component to achieve the separation of biomass synthesis gas. The separation effect is more thorough than membrane separation and adsorption methods. The separated carbon monoxide, carbon dioxide, and hydrogen are stored separately, providing convenient conditions for subsequent chemical reactions to synthesize alcohols and improving the efficiency of alcohol reactions. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the overall biomass syngas separation unit;

[0018] Figure 2 This is a schematic diagram of the separator;

[0019] Figure 3 This is a schematic diagram of the flow-around structure. Detailed Implementation

[0020] The following description is only intended to disclose the present invention so that those skilled in the art can implement it. The embodiments in the following description are merely examples, and those skilled in the art will conceive of other obvious modifications. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other solutions that do not depart from the spirit and scope of the present invention.

[0021] Example 1:

[0022] A biomass syngas separation device, such as Figure 1 It includes a refrigeration module 1, a separation module 2, and a gas supply module 3.

[0023] The refrigeration module 1 preferably uses a compression refrigeration device.

[0024] The separation module 2 includes a separation tank 23, a separation outlet 25 disposed on the separation tank 23, a heat exchange coil 22 disposed in the separation tank 23, and a flow-around structure 26. The heat exchange coil 22 exchanges heat with the refrigeration module 1 through the cooling pipe 21, and then the refrigeration module 1 makes the heat exchange coil 22 reach the required temperature. The flow-around structure 26 forms a tortuous channel in the separation tank 23, increasing the flow distance of the syngas inside the separation tank.

[0025] Alternatively, a tortuous channel can be formed within the structure of the separator 23 itself.

[0026] The separator 23 can be a cylindrical or other shaped structure, and the flow structure 26 is as follows: Figure 3 The system includes several flow plates, each with a flow hole 27. In other embodiments, a gap may be formed between the flow plate and the wall of the separator 23 to create a flow gap. The flow holes 27 on adjacent flow plates are staggered. For example, if the flow hole 27 of the upper flow plate is on the leftmost side, then the flow hole 27 of the lower flow plate is on the rightmost side. The flow plates increase the flow distance of the syngas inside the separator, which can fully cool the gas and achieve gas liquefaction.

[0027] Synthesis gas exchanges heat with heat exchange coil 22; when the temperature reaches -78.5℃, carbon dioxide is liquefied, and liquid carbon dioxide flows out from separation outlet 25; when the temperature reaches -199℃, carbon monoxide is liquefied, and liquid carbon monoxide flows out from separation outlet 25; when the temperature reaches -253℃, hydrogen is liquefied, and liquid hydrogen flows out from separation outlet 25. The separated carbon monoxide, carbon dioxide, and hydrogen are stored separately, providing convenient conditions for subsequent chemical reactions to synthesize alcohols and improving the efficiency of alcohol reactions.

[0028] Optionally, a valve assembly may be installed at the separation outlet 25.

[0029] like Figure 2 The heat exchange coil 22 and the tortuous channel are interspersed. Specifically, the tortuous channel is a vertical S-shaped curve from top to bottom, and the heat exchange coil 22 is a horizontal S-shaped curve, forming an interspersed arrangement between the two. This ensures uniform cooling of the tortuous channel and allows the gas to fully contact the heat exchange coil 22. A sealing structure is provided at the contact position between the heat exchange coil 22 and the flow plate to ensure that the gas flows through the predetermined channel.

[0030] The separation module 2 also includes a separation monitoring thermometer 24, which is set in several groups to measure the temperature of different areas in the separation tank 23.

[0031] In this embodiment, three sets of separation monitoring thermometers 24 are set at the upper, middle and lower positions of the separation tank 23, respectively. The separation monitoring thermometers 24 are electrically connected to the refrigeration module 1, and the refrigeration module 1 controls the operating power according to the temperature parameters.

[0032] The gas supply module 3 includes a syngas storage tank 33, an inlet pipe 35, and a return pipe 34. One end of the tortuous channel is connected to the inlet pipe 35, and the other end is connected to the separation outlet 25. The inlet pipe 35 is set at a height higher than the separation outlet 25, so that the liquid separation gas can flow out.

[0033] Syngas enters the separator 23 through the inlet pipe 35. After being cooled by the heat exchange coil 22, the liquid gas is discharged through the separator outlet 25. A syngas monitoring thermometer 36 is installed at the inlet pipe 35 to monitor the temperature of the syngas when it enters. Optionally, the syngas monitoring thermometer 36 can be electrically connected to the refrigeration module 1. The refrigeration module 1 controls the operating power according to the temperature parameters.

[0034] Syngas storage tank 33 is connected to syngas main pipe 31, which is used to connect to biomass combustion equipment. Inlet pipe 35 is connected to syngas storage tank 33.

[0035] A regulating valve 37 is installed on the syngas main pipe 31, the inlet pipe 35 and the return pipe 34. During separation, the regulating valve on the syngas main pipe 31 is closed and the regulating valves on the inlet pipe 35 and the return pipe 34 are opened to enable the syngas to circulate between the syngas storage tank 33 and the separator 23, and can also assist in pressure regulation.

[0036] Syngas storage tank 33 and separator 23 are connected by inlet pipe 35 and return pipe 34. A gas pump 32 is installed on the return pipe 34. The inlet pipe 35 and return pipe 34 realize the circulation of gas, ensuring that the various components of gas in syngas storage tank 33 are effectively separated.

[0037] Example 2:

[0038] Based on Example 1, in this example, the refrigeration module 1 includes a condenser 11, a compressor 12, an evaporator 13 and an expansion valve 14. The heat exchange coil 22 exchanges heat with the evaporator 13. The refrigerant absorbs heat and evaporates from the evaporator 13, then enters the compressor 12 for compression under adiabatic conditions, and then enters the condenser 11 to dissipate heat to the ambient medium at equal pressure.

[0039] Inside the condenser 11, the superheated refrigerant vapor is first isobarically cooled to the saturation temperature corresponding to the current pressure, and then continues to be isobarically (and isothermally) condensed into a saturated liquid state. It then enters the expansion valve 14, where it is adiabatically throttled and cooled and depressurized to a wet saturated vapor state corresponding to the cycle start pressure. Finally, it enters the evaporator 13 to absorb heat and evaporate, completing the cycle.

[0040] The heat released by the condenser 14 can be recovered using waste heat recovery devices such as heat exchangers, and can be used for heating, drying or heat storage.

[0041] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations and modifications.

Claims

1. A biomass syngas separation apparatus, characterized by: The application relates to a refrigeration module (1), a separation module (2) and a gas supply module (3), wherein the separation module (2) comprises a separation tank (23), a separation outlet (25) arranged on the separation tank (23), a heat exchange coil (22) arranged in the separation tank (23) and a flow-around structure (26), the heat exchange coil (22) is in heat exchange with the refrigeration module (1), and the flow-around structure (26) is arranged to form a meandering channel in the separation tank (23); the gas supply module (3) comprises an inflow pipe (35), one end of the meandering channel is connected with the inflow pipe (35), the other end is connected with the separation outlet (25), and the heat exchange coil (22) and the meandering channel are arranged in a penetrating mode.

2. The biomass syngas separation apparatus of claim 1, wherein: The separation module (2) further comprises separation monitoring thermometers (24), the separation monitoring thermometers (24) are arranged in several groups and are used for measuring the temperatures of different areas in the separation tank (23).

3. The biomass syngas separation apparatus of claim 2, wherein: The separation monitoring thermometers (24) are electrically connected with the refrigeration module (1).

4. The biomass syngas separation apparatus of any one of claims 1-3, wherein: The gas supply module (3) further comprises a synthetic gas storage tank (33), the synthetic gas storage tank (33) is connected with a synthetic gas main pipe (31), and the inflow pipe (35) is connected with the synthetic gas storage tank (33).

5. The biomass syngas separation apparatus of claim 4, wherein: A backflow pipe (34) is connected between the synthetic gas storage tank (33) and the separation tank (23), and a gas pump (32) is arranged on the backflow pipe (34).

6. The biomass syngas separation apparatus of claim 5, wherein: A synthetic gas monitoring thermometer (36) is arranged at the inflow pipe (35).

7. A biomass syngas separation apparatus according to claim 5 or 6, characterised in that: The refrigeration module (1) comprises a condenser (11), a compressor (12), an evaporator (13) and an expansion valve (14), and the heat exchange coil (22) is in heat exchange with the evaporator (13).

8. The biomass syngas separation apparatus of claim 5 or 6, wherein: The flow-around structure (26) comprises several flow-around plates, the flow-around plates are provided with flow-through holes (27), and the flow-through holes (27) on adjacent flow-around plates are arranged in a staggered mode.

9. The biomass syngas separation apparatus of claim 8, wherein: Sealing structures are arranged at the positions, where the heat exchange coil (22) is in contact with the flow-around plates.

10. The biomass syngas separation apparatus of claim 1, wherein: The inflow pipe (35) is arranged at a height higher than the arrangement height of the separation outlet (25).

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