Fixed bed catalyst evaluation small-scale test device

Abstract

The utility model discloses a small-scale test device for evaluating a fixed bed catalyst, which comprises a gas feeding unit, a catalytic reaction unit, a synthetic reaction unit, a product collecting unit and a product online analysis unit, materials in the gas feeding unit are synthesized through the catalytic reaction unit or the synthesis reaction unit, then effectively separated through the product collection unit and finally detected through the product online analysis unit, and the catalytic reaction unit or the synthesis reaction unit adopts a double-channel double-temperature-control mode. And transverse contrast test is realized through different reaction temperature control modes, so that a catalytic reaction and a synthetic reaction of reactants at proper temperature and pressure are ensured, and the reaction efficiency and the product quality are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to catalyst detection technical field, concretely relates to fixed bed catalyst evaluation pilot plant. BACKGROUND

[0002] Fixed bed catalyst evaluation pilot plant is a kind of experimental equipment specially used to evaluate catalyst performance, simulates industrial reaction process under laboratory conditions, provides basic data for the industrial application of catalyst, and the measuring and evaluating device in the prior art generally adopts single-channel manual operation, can only carry out single mode to test mixture, and the effect of testing is poor, and effective comparison cannot be realized. UTILITY MODEL CONTENTS

[0003] The utility model provides fixed bed catalyst evaluation pilot plant, solves the problems in prior art.

[0004] In order to solve the above technical problem, the utility model adopts the following technical scheme:

[0005] Fixed bed catalyst evaluation pilot plant, characterized by comprising:

[0006] Gas feeding unit, gas feeding unit includes first conveying pipeline, second conveying pipeline, third conveying pipeline and fourth conveying pipeline arranged in parallel, through the first, second, third and fourth conveying pipelines arranged in parallel, the device can realize flexible proportioning and accurate conveying of different gas raw materials;Catalytic reaction unit, comprising first reactor and first reaction furnace, first reactor is arranged through in first reaction furnace;Synthesis reaction unit, comprising second reactor and second reaction furnace, second reactor is arranged through in second reaction furnace;Product collection unit, product collection unit includes condenser connected with catalytic reaction unit and synthesis reaction unit and gas-liquid separation tank connected with condenser;Product online analysis unit, product online analysis unit is used to detect medium in product collection unit;Material in gas feeding unit is synthesized through catalytic reaction unit or synthesis reaction unit, then effectively separated through product collection unit, finally detected through product online analysis unit, through setting catalytic reaction unit or synthesis reaction unit, using double-channel double-temperature control mode, realizing horizontal comparison test through different reaction temperature control mode, ensure that reactants carry out catalytic reaction and synthesis reaction under suitable temperature and pressure, thereby improve reaction efficiency and product quality.

[0007] Further, the first delivery pipeline, the second delivery pipeline, the third delivery pipeline and the fourth delivery pipeline are each provided with a pressure reducing valve, a stop valve, a mass flow controller, a filter, a pressure gauge and a check valve, the filter is used to remove impurities and particulate matters in the gas to prevent them from entering the reactor to affect the effect of catalytic reaction or damage the equipment, the main function of the pressure reducing valve is to adjust and stabilize the pressure of the input gas to ensure that the gas will not damage the pipeline or the reactor due to excessive pressure during delivery, and at the same time, it also provides a stable pressure environment for subsequent flow control, the stop valve is used to quickly cut off or connect the gas flow path to facilitate quick isolation of the gas source in emergency situations or equipment maintenance to ensure the safety of the operator, and at the same time, it is also convenient for the maintenance of a single pipeline without affecting the normal operation of other pipelines, the mass flow controller can accurately control the flow of the gas to ensure stable delivery according to the set flow value, the pressure gauge displays the gas pressure in the pipeline in real time to provide an intuitive monitoring means for the operator, and the setting of the check valve ensures that the gas can only flow in one direction to prevent reverse flow caused by pressure fluctuation or misoperation.

[0008] Further, the first delivery pipeline, the second delivery pipeline, the third delivery pipeline and the fourth delivery pipeline are each provided with a high-pressure bypass, the high-pressure bypass is connected between the inlet and outlet of the mass flow controller, and the high-pressure bypass is arranged to protect the main delivery pipeline and other equipment in the system from damage caused by excessive pressure. It allows bypassing the main delivery pipeline under certain conditions (such as high system pressure or the need for rapid flow adjustment) to achieve rapid flow adjustment or pressure relief.

[0009] Further, the gas feeding unit is connected to the synthesis reaction unit and the product collection unit through a connecting pipeline, the connecting pipeline is sequentially provided with a mixer, a buffer tank and a preheater connected to the gas feeding unit, the gas in the gas feeding unit is mixed sufficiently by the mixer, the buffer tank is connected to the mixer to store and adjust the flow of the mixed gas and provide a stable pressure environment to reduce the impact of flow fluctuation on the reaction, and the preheater is connected to the buffer tank, the gas in the buffer tank is heated to the appropriate temperature required for the synthesis reaction by the preheater to ensure uniform temperature distribution of the gas when entering the reactor, thereby improving the efficiency of the catalytic reaction and the selectivity of the product.

[0010] Further, one side of the catalytic reaction unit is connected to an auxiliary heating unit, the auxiliary heating unit includes a pipeline preheater connected to the first reaction furnace, a flow meter connected to the pipeline preheater and a fan connected to the flow meter, the heated hot gas is sent into the first reaction furnace by the fan, when the catalytic reaction unit needs additional heat, the auxiliary heating unit is started, the fan is started, the gas is driven to enter the pipeline preheater for heating and is delivered to the first reaction furnace, which can accelerate the catalytic reaction rate and improve the reaction efficiency.

[0011] Further, one side of the first reactor is provided with an exhaust pipeline for discharging high-temperature gas of the auxiliary heating unit, and discharging part of the gas through the exhaust pipeline can maintain the dynamic balance of the gas in the reactor and ensure that the gas in the reactor can maintain a stable temperature range, so that the reaction can continue and be stable.

[0012] Further, the first reactor and the second reactor are high-pressure quartz lining reactors or high-temperature alloy material reactors, which have the characteristics of high temperature resistance and high pressure resistance, and have good sealing between the quartz reactor and the reactor, which can effectively prevent the reaction gas from contacting other gas impurities and affecting the experimental results.

[0013] Further, the first reactor and the second reactor are provided with a precision pressure gauge, a pressure transmitter, a differential pressure transmitter and an unloading valve upstream thereof, the precision pressure gauge is used for directly measuring and displaying the gas or liquid pressure value upstream of the reactor, and is used for monitoring the pressure in the reactor, the pressure transmitter converts the pressure signal upstream of the reactor into a standard electrical signal for remote monitoring and control, realizes real-time monitoring and alarm function, the differential pressure transmitter is used for measuring the pressure difference between different positions upstream of the reactor, and the unloading valve is an important safety device in the reaction system. When the system pressure exceeds the set value, the unloading valve will automatically open to release the excessive pressure, so as to protect the system equipment and pipeline from being damaged.

[0014] Further, one side of the condenser is connected with a low-temperature tank, and the low-temperature tank is used for providing refrigerant medium for the condenser. These refrigerant media provide the required low-temperature environment for the condenser through circulation or direct injection, so that the gaseous substances can be successfully condensed.

[0015] Further, the outlet end of the gas-liquid separator is connected with a sampling tank for sampling the mixture after reaction, so as to ensure that the obtained sample can truly reflect the composition and characteristics of the separated gas-liquid mixture.

[0016] The utility model discloses a fixed bed catalyst evaluation small test device, and has the following beneficial effects:

[0017] The utility model discloses a fixed bed catalyst evaluation small test device, and has the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model discloses a fixed bed catalyst evaluation small test device, and has the following beneficial effects:

[0019] Figure 1 It is the internal structure schematic view of fixed bed catalyst evaluation pilot plant of the utility model;

[0020] Figure 2 It is Figure 1 The left view of it is shown in the figure.

[0021] Figure 3 It is the work flow chart of the utility model;

[0022] Figure 4 It is the schematic view of gas feeding unit in the utility model;

[0023] Figure 5 It is the schematic view of product collecting unit in the utility model;

[0024] Figure 6 It is the structural schematic view of reactor in the utility model;

[0025] Figure 7 It is the internal structure schematic view of preheater in the utility model.

[0026] In the figure,

[0027] 10 - case; 11 - gas feeding unit; 12 - catalytic reaction unit; 13 - synthesis reaction unit; 14 - product collecting unit; 15 - controller; 16 - product online analysis unit; 17 - filter; 18 - stop valve; 19 - pressure reducing valve; 20 - mass flow controller; 21 - check valve; 22 - pressure gauge; 23 - high pressure bypass; 24 - first conveying pipeline; 25 - second conveying pipeline; 26 - third conveying pipeline; 27 - fourth conveying pipeline; 28 - second reaction furnace; 29 - second reactor; 30 - first reaction furnace; 31 - first reactor; 32 - fan; 33 - flow meter; 34 - pipeline preheater; 35 - low temperature tank; 36 - condenser; 37 - gas-liquid separator; 38 - sampling tank; 39 - exhaust pipeline; 40 - preheater; 41 - buffer tank; 42 - mixer. DETAILED DESCRIPTION

[0028] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0031] like Figures 1 to 7 As shown, this is a pilot-scale device for evaluating fixed-bed catalysts of this invention. By setting up a catalytic reaction unit 12 or a synthesis reaction unit 13 and adopting a dual-channel dual-temperature control method, a comparative test is achieved through different reaction temperature control methods. This ensures that the reactants carry out catalytic and synthesis reactions under suitable temperature and pressure, thereby improving reaction efficiency and product quality.

[0032] As shown in the figure, the fixed-bed catalyst evaluation pilot device includes a gas feed unit 11, a catalytic reaction unit 12, a synthesis reaction unit 13, a product collection unit 14, and a product online analysis unit 16. The gas feed unit 11, catalytic reaction unit 12, synthesis reaction unit 13, product collection unit 14, and product online analysis unit 16 are integrated and installed in a chassis 10. The chassis 10 is equipped with a controller 15, which adopts a PLC control system. The controller 15 is used to control the controllable components in the device. The material in the gas feed unit 11 is synthesized through either the catalytic reaction unit 12 or the synthesis reaction unit 13, then effectively separated through the product collection unit 14, and finally detected through the product online analysis unit 16.

[0033] The gas feeding unit 11 comprises a first conveying pipeline 24, a second conveying pipeline 25, a third conveying pipeline 26 and a fourth conveying pipeline 27 arranged in parallel, which are used for conveying the gas required for the reaction, and each of the first conveying pipeline 24, the second conveying pipeline 25, the third conveying pipeline 26 and the fourth conveying pipeline 27 is sequentially provided with a filter 17, a stop valve 18, a pressure reducing valve 19, a pressure gauge 22, a mass flow controller 20 and a check valve 21. The valves and the pressure gauge 22 are common components in the prior art, and the specific number of components is set according to the actual situation. The high-pressure gas raw material first passes through the filter 17 to remove impurities and particulate matters in the gas, so as to prevent them from entering the reactor and affecting the effect of the catalytic reaction or damaging the equipment. The stop valve 18 is arranged to quickly cut off or connect the gas flow path, so as to quickly isolate the gas source in an emergency or during equipment maintenance, thereby ensuring the safety of the operator. The pressure reducing valve 19 adjusts and stabilizes the pressure of the input gas, so as to ensure that the gas will not damage the pipeline or the reactor due to excessively high pressure during the conveying process, and also provides a stable pressure environment for subsequent flow control. The pressure gauge 22 displays the gas pressure in the pipeline in real time, thereby providing an intuitive monitoring means for the operator. The mass flow controller 20 can accurately control the flow of the gas, so as to ensure stable conveying according to the set flow value. The check valve 21 is arranged to ensure that the gas can only flow in one direction, thereby preventing the reverse flow phenomenon caused by pressure fluctuation or misoperation, improving the overall safety and stability, ensuring the safe operation of the pipeline by arranging the valves, and improving the safety of the pipeline. Each gas path adopts a high-pressure gas mass flow controller 20 to control the flow of the gas. The mass flow controller 20 has a pressure resistance of 10 MPa, a flow control accuracy of ±1% F.S, and a high-pressure bypass 23. The high-pressure bypass 23 is provided with a stop valve 18 and other valves having a protection effect. The high-pressure bypass 23 is connected between the inlet and the outlet of the mass flow controller 20. The high-pressure bypass 23 is arranged to protect the main conveying pipeline and other equipment in the system from damage caused by excessively high pressure. It allows bypassing the main conveying pipeline under certain conditions (such as excessively high system pressure or the need for rapid flow adjustment), so as to achieve rapid flow adjustment or pressure relief.

[0034] The gas feeding unit 11 is connected with the synthesis reaction unit 13 and the product collection unit 14 through a connecting pipeline, which is sequentially provided with a mixer 42 connected with the gas feeding unit 11, a buffer tank 41 connected with the mixer 42 and a preheater 40 connected with the buffer tank 41. The gas conveyed by the gas feeding unit 11 is mixed in the mixer 42, stored and transitioned in the buffer tank 41, and then preheated to a suitable temperature in the preheater 40 before being conveyed to the subsequent operation unit.

[0035] The mixed gas in the gas feeding unit 11 is divided into two passages after the connecting pipeline, one passage is into the product collecting unit 14 after passing through the catalytic reaction unit 12 or into the product collecting unit 14 after passing through the synthesis reaction unit 13, both of which are controlled by different reaction temperature control modes, under the same test conditions, different reaction temperature control modes have obvious comparison effect, which is convenient to operate, the catalytic reaction unit 12 and the synthesis reaction unit 13 can be provided with a stop valve 18 on the pipeline, the opening and closing of the stop valve 18 is controlled by the controller 15 to control the reaction route of the gas, the catalytic reaction unit 12 includes a first reactor 31 and a first reaction furnace 30, the first reactor 31 is arranged through the first reaction furnace 30, the mixed gas enters the first reactor 31 after passing through the preheater 40, the first reaction furnace 30 adopts a five-stage isothermal electric heating furnace, the gas in the first reactor 31 is heated by electric heating, the operating temperature RT of the heating furnace is 1200℃, the heating furnace can work at 1200℃ for a long time, the heating furnace has a heating rate > 30℃ / min, the main body material of the first reactor 31 is made of high-temperature alloy material, the operating temperature RT is 1200℃, the operating pressure is 10Mpa, the first reactor 31 is designed to ensure that the effective residence time of biomass pyrolysis gasification is 1-3S, and the temperature measuring point is designed inside the first reactor 31 for monitoring the temperature.

[0036] The catalytic reaction unit 12 is connected with an auxiliary heating unit on one side, the auxiliary heating unit includes a pipeline preheater 34 connected with the first reaction furnace 30, a flow meter 33 connected with the pipeline preheater 34 and a fan 32 connected with the flow meter 33, the heated hot gas is sent into the first reaction furnace 30 by the fan 32, when the catalytic reaction unit 12 needs additional heat, the auxiliary heating unit is started, the fan 32 is started, the gas is driven to enter the pipeline preheater 34 for heating and is transported to the first reaction furnace 30, the mixed gas in the first reactor 31 is heated by the high-temperature gas, which can accelerate the catalytic reaction rate and improve the reaction efficiency, one side of the first reaction furnace 30 is provided with an exhaust pipeline 39, the exhaust pipeline 39 is used for discharging the gas with lower temperature after heating the first reactor 31 in the first reaction furnace 30, part of the gas is discharged through the exhaust pipeline 39, which can maintain the dynamic balance of the gas in the furnace, ensure that the gas in the reaction furnace can maintain a stable temperature interval, so that the reaction can continue and stably.

[0037] The synthesis reaction unit 13 comprises a second reactor 29 and a second reaction furnace 28, the second reactor 29 is arranged through in the second reaction furnace 28, the synthesis reaction furnace adopts a three-stage isothermal electric heating furnace, the operating temperature is RT~1200 DEG C, the temperature rising rate is greater than or equal to 30 DEG C / min, the length of constant temperature zone is greater than or equal to 170 mm at + or - 0.5 DEG C, the second reactor 29 adopts the high-pressure type reactor lined with quartz, and the quartz reactor and the stainless steel reactor have good sealing, can effectively prevent the contact between stainless steel and reaction gas, thereby affecting the experimental results, the first reactor 31 and the upstream of the second reactor 29 are provided with a precision pressure gauge 22, a pressure transmitter, a differential pressure transmitter and an unloading valve, the precision pressure gauge 22 is used for directly measuring and displaying the gas or liquid pressure value upstream of the reactor, for monitoring the pressure in the reactor, the pressure transmitter converts the pressure signal upstream of the reactor into a standard electric signal, so as to facilitate remote monitoring and control, realize real-time monitoring and alarm functions, the differential pressure transmitter is used for measuring the pressure difference between different positions upstream of the reactor, and the unloading valve is an important safety device in the reaction system.When the system pressure exceeds the set value, the unloading valve will automatically open, and the excessive pressure is released, so as to protect the system equipment and pipeline from being damaged.

[0038] The output ends of the catalytic reaction unit 12 and the synthesis reaction unit 13 are connected to the product collection unit 14, and the product collection unit 14 comprises a condenser 36 connected to the catalytic reaction unit 12 and the synthesis reaction unit 13 and a gas-liquid separation tank connected to the condenser 36, the condenser 36 is used for further cooling the gas mixture after reaction, the condenser 36 adopts a spiral jacket design, and the condenser 36 is connected to a low-temperature tank 35 on one side, and the low-temperature tank 35 connected externally provides refrigerant, and the mixture after cooling enters the gas-liquid separator 37 from the condenser 36, the gas-liquid separator 37 further separates the mixture, the effective volume of the gas-liquid separator 37 is 300 mL, the tank body is made of 316L, the operating temperature is less than or equal to 60 DEG C, and the operating pressure is 0.1-10 Mpa, and the outlet end of the gas-liquid separator 37 is connected to a sampling tank 38 for sampling the mixture after reaction, the effective volume of the sampling tank 38 is 5 mL, the tank body is made of 316L, the operating temperature is less than or equal to 100 DEG C, and the operating pressure is 0.1-10 Mpa.

[0039] One end of the gas-liquid separator 37 is communicated with the product online analysis unit 16, and the product online analysis unit 16 is used for detecting the medium separated in the gas-liquid separator 37.

[0040] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this. Any simple change, equivalent replacement or modification made on the basis of the present application to solve basically the same technical problem and achieve basically the same technical effect is also covered in the protection scope of the present application.

Claims

1. A fixed bed catalyst evaluation pilot plant unit characterized by, The utility model relates to a kind of gas production system, including: Gas feeding unit, the gas feeding unit includes first delivery pipeline, second delivery pipeline, third delivery pipeline and fourth delivery pipeline arranged in parallel; Catalytic reaction unit, including first reactor and first reaction furnace, the first reactor is arranged through in the first reaction furnace; Synthesis reaction unit, including second reactor and second reaction furnace, the second reactor is arranged through in the second reaction furnace; Product collection unit, the product collection unit includes condenser connected with the catalytic reaction unit and the synthesis reaction unit and gas-liquid separation tank connected with the condenser; Product online analysis unit, the product online analysis unit is used to detect medium in the product collection unit.

2. The fixed bed catalyst evaluation microreactor of claim 1, characterized in that: The first delivery pipeline, second delivery pipeline, third delivery pipeline and fourth delivery pipeline are provided with pressure reducing valve, stop valve, mass flow controller, filter, pressure gauge and check valve.

3. The fixed bed catalyst evaluation microreactor of claim 2, wherein: The first delivery pipeline, second delivery pipeline, third delivery pipeline and fourth delivery pipeline are provided with high pressure bypass, and the high pressure bypass is communicated between inlet and outlet of the mass flow controller.

4. The fixed bed catalyst evaluation microreactor of claim 1, wherein: The gas feeding unit is connected with the synthesis reaction unit and product collection unit through connecting pipeline, and the connecting pipeline is sequentially provided with mixer connected with the gas feeding unit, buffer tank and preheater.

5. The fixed bed catalyst evaluation microreactor of claim 1, wherein: One side of the catalytic reaction unit is connected with auxiliary heating unit, and the auxiliary heating unit includes pipeline preheater connected with the first reaction furnace, flow meter connected with the pipeline preheater and fan connected with the flow meter, and hot gas after heating is sent into the first reaction furnace through the fan.

6. The fixed bed catalyst evaluation microreactor of claim 5, wherein: One side of the first reaction furnace is provided with exhaust pipeline, and the exhaust pipeline is used for exhausting high-temperature gas of the auxiliary heating unit.

7. The fixed bed catalyst evaluation microreactor of claim 1, wherein: The first reactor and the second reactor adopt high-pressure quartz lining reactor or high-temperature alloy material reactor.

8. The fixed bed catalyst evaluation microreactor of claim 1, wherein: The first reactor and the second reactor are provided with precision pressure gauge, pressure transmitter, differential pressure transmitter and unloading valve upstream.

9. The fixed bed catalyst evaluation microreactor of claim 1, wherein: One side of the condenser is connected with low-temperature tank, and the low-temperature tank is used for providing refrigerant medium for the condenser.

10. The fixed bed catalyst evaluation microreactor of claim 1, wherein: The outlet end of the gas-liquid separation tank is connected with sampling tank.

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