Carbon dioxide high-temperature hydrogenation catalyst evaluation device with closed observation function

Abstract

The utility model provides a carbon dioxide high-temperature hydrogenation catalyst evaluation device with a closed observation function, which relates to the technical field of catalyst evaluation and comprises an evaluation machine body, an electric furnace is assembled on one side of the evaluation machine body, and a catalytic component is mounted in the electric furnace and comprises a quartz tube. The quartz tubes are annularly arranged in an inner cavity of the electric furnace, and the outer surfaces of the quartz tubes are sleeved with protection pieces used for protecting and isolating the quartz tubes. A plurality of quartz tubes are annularly arranged in the electric furnace, the quartz tubes can work on a plurality of different catalysts in the electric furnace at the same time, the outer surfaces of the quartz tubes are sleeved with a layer of protection part, and the surface of the protection part is provided with an observation window, so that the quartz tubes can be isolated and protected, and observation and photo-thermal reaction are facilitated; and when the observation windows arranged on the surfaces of the plurality of protection pieces are in a static state, the observation windows are jointly matched to form an annular transparent shape, so that the internal conditions of the plurality of quartz tubes can be simultaneously observed.

Description

Technical Field

[0001] The invention relates to the technical field of catalyst evaluation, and in particular to a carbon dioxide high-temperature hydrogenation catalyst evaluation device with closed observation. Background Art

[0002] Due to the influence of human activities, the carbon dioxide content in the atmosphere has risen sharply in recent years, and the greenhouse effect has become increasingly significant, which has led to a series of problems such as global warming, melting glaciers, and rising sea levels. While controlling carbon dioxide emissions, it is of great significance to achieve effective utilization of carbon dioxide. At present, carbon dioxide recovery and utilization technologies include pressure swing adsorption, membrane separation, absorption, and catalytic conversion. Among them, carbon dioxide catalytic hydrogenation is of particular importance. Carbon dioxide can react with hydrogen to produce low-carbon compounds such as methane, methanol, methyl ether, formic acid and its derivatives.

[0003] At present, the carbon dioxide high-temperature hydrogenation catalyst evaluation device mainly uses electric furnace high-temperature heating to process the catalyst in the internal quartz tube. The quartz tube is a special industrial technical glass made of silicon dioxide. Although it has certain high-temperature resistance, it will still be damaged and broken due to the pressure difference between the inside and the outside of the quartz tube under high temperature environment for a long time. When a protective cover is added to protect and isolate the quartz tube, it is not convenient for observation and subsequent photothermal reaction. Moreover, the electric furnace is usually used in conjunction with a single set of quartz tubes, resulting in only a single catalyst being catalyzed at a time. If multiple catalysts are catalyzed at a time, more electric furnace equipment is required to catalyze the catalyst in the quartz tube, increasing the use and maintenance costs. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention aims to propose a carbon dioxide high-temperature hydrogenation catalyst evaluation device with closed observation, and the specific scheme is as follows: an evaluation body, one side of which is equipped with an electric furnace, and a catalytic component is installed in the electric furnace, the catalytic component includes a quartz tube, and the quartz tubes are multiple and arranged in a ring in the inner cavity of the electric furnace, the outer surface of the quartz tube is sleeved with a protective member for protecting and isolating the quartz tube, and the surface of the protective member is inlaid with an observation window, and a mixing tube is provided at the end of the electric furnace, and a plurality of conveying bases are installed on the outer surface of the mixing tube.

[0005] Preferably, a refractory lining is installed in the inner cavity of the electric furnace and on the outer side of the quartz tube, and quartz sand, a catalyst and a sand core are provided in the middle section of the inner cavity of the quartz tube from top to bottom, and a stabilizing seat is provided at the bottom of the protective element.

[0006] Preferably, a loading seat is provided through the end of the quartz tube and located in the inner cavity of the electric furnace, and an assembly base shell is installed at the end of the loading seat and located outside the electric furnace, and the assembly base shell is used to assemble the mixing tube and the conveying base.

[0007] Preferably, a slide groove is provided at the end of the inner cavity of the loading seat, and a support rod body is installed at the bottom of the inner cavity of the loading seat.

[0008] Preferably, the end of the support rod body is connected to the end of the loading seat by a bolt fastener, the surface of the support rod body is provided with an auxiliary support plate body through a bearing movable sleeve, and the surface of the auxiliary support plate body is annularly inlaid with multiple sleeves.

[0009] Preferably, the end of the mixing tube is movably connected to a connecting pipe, and one end of the connecting pipe is connected to a guide pipe body.

[0010] Preferably, the conveying bases are multiple and symmetrically sleeved on the surface of the mixing tube, and the surface of the mixing tube is provided with through holes, and the outer surface of the conveying bases penetrates to the outer surface of the assembly base shell.

[0011] Preferably, the outer surface of the delivery base is connected to a delivery tube body, and a valve body for opening and closing the inner cavity of the delivery tube body is installed on the surface of the delivery tube body.

[0012] Preferably, the bottom of the conveying tube body penetrates into the inner cavity of the loading seat and is connected with the distribution tube body, and the bottom of the distribution tube body is connected with the end of the catheter, wherein the surface of the conveying tube body is in sliding contact with the inner cavity of the slide groove.

[0013] Preferably, an annular seat is slidably provided at the end of the loading seat, and an auxiliary pushing member is connected to the end of the annular seat.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. By arranging multiple quartz tubes in a ring in the electric furnace, the multiple quartz tubes can work on multiple different catalysts in the electric furnace at the same time, and a layer of protective parts is sheathed on the outer surface of the quartz tubes, and an observation window is installed on the surface of the protective parts, which can isolate and protect the quartz tubes and facilitate observation and photothermal reaction; when the observation windows arranged on the surfaces of the multiple protective parts are in a static state, they cooperate to form a transparent ring shape, which can observe the internal conditions of multiple quartz tubes at the same time.

[0016] 2. When the quartz tube in the blind spot is not conducive to the operator's observation, the operator only needs to rotate the auxiliary pusher to move the delivery tube body, and then drive the quartz tube to move through the delivery tube body, so that the quartz tube in the blind spot moves in front of the operator, which is conducive to the operator's observation of multiple quartz tubes.

[0017] 3. When adjusting the position of the quartz tube, in order to avoid interference of the connecting pipe fittings with the movement of the quartz tube, when the quartz tube is displaced by the conveying tube body, the conveying tube body simultaneously drives the conveying base to rotate, and the conveying base is in a sliding contact state with the dispensing tube and the assembly base shell, so that the displacement of the conveying tube body can only drive the displacement of the conveying base, but cannot drive the displacement of the dispensing tube, thereby avoiding interference of the dispensing tube with the movement of the quartz tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure assembly of a carbon dioxide high temperature hydrogenation catalyst evaluation device according to an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of an electric furnace assembly according to an embodiment of the present invention;

[0020] Figure 3 A schematic cross-sectional view of an electric furnace according to an embodiment of the present invention;

[0021] Figure 4 It is a schematic diagram of assembling a catalytic component according to an embodiment of the present invention;

[0022] Figure 5 It is a three-dimensional exploded schematic diagram of a catalytic component of an embodiment of the present invention;

[0023] Figure 6 It is a cross-sectional assembly diagram of an electric furnace and a refractory lining according to an embodiment of the present invention;

[0024] Figure 7 It is a schematic diagram of the assembly of the base shell, the deployment tube and the conveying base structure of an embodiment of the present invention;

[0025] Figure 8 It is a front view schematic diagram of the assembly base shell, the deployment tube and the conveying base structure of an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100, evaluation body; 110, electric furnace; 120, refractory lining;

[0028] 200, catalytic component; 210, quartz tube; 211, quartz sand; 212, catalyst; 213, sand core; 220, protective element; 221, observation window; 230, conduit; 240, stabilizing support seat;

[0029] 300, loading seat; 301, slide slot; 310, support rod body; 311, auxiliary support plate body; 320, assembly base shell;

[0030] 400, connecting pipe fitting; 410, guide pipe body; 420, adjustment tube;

[0031] 500, delivery base; 510, delivery pipe body; 511, valve body; 520, distribution pipe body; 530, annular seat; 531, auxiliary push piece. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0033] In the prior art, the carbon dioxide high-temperature hydrogenation catalyst evaluation device mainly uses an electric furnace for high-temperature heating to process the catalyst in the quartz tube inside it. The quartz tube is a special industrial technical glass made of silicon dioxide. Although it has certain high-temperature resistance, it will still be damaged and broken due to the pressure difference between the inside and the outside of the quartz tube under high-temperature environment for a long time. When a protective cover is added to protect and isolate the quartz tube, it is not convenient for observation and subsequent photothermal reaction. In addition, the electric furnace is usually used in conjunction with a single group of quartz tubes, resulting in only a single catalyst being catalyzed at a time. If multiple catalysts are catalyzed at a time, more electric furnace equipment is required to catalyze the catalyst in the quartz tube, increasing the use and maintenance costs. In order to solve the above problems, the following scheme is proposed.

[0034] For details, please refer to Figures 1 to 8 As shown, it includes an evaluation body 100, one side of the evaluation body 100 is equipped with an electric furnace 110, and the inner cavity of the electric furnace 110 and the outer side of the quartz tube 210 are installed with a refractory lining 120;

[0035] like Figure 3-Figure 5 As shown, a catalytic assembly 200 is installed in the electric furnace 110. The catalytic assembly 200 includes a quartz tube 210. The quartz tube 210 is arranged in a ring in the inner cavity of the electric furnace 110. The quartz tube 210 is 68.5 mm long and has an inner diameter of 6 mm. The upper section is 37.5 mm long and the lower section is 31 mm long.

[0036] CO 2 The hydrogenation to methanol reaction is carried out in a vertical high temperature and high pressure fixed bed reactor. The catalyst is mixed and loaded into an inner diameter of 6mm;

[0037] Before starting the reaction, high-purity N 2 The pretreatment was carried out at 300℃ for 1h, and then the mixed raw gas (H 2 / CO 2 ) was introduced into a fixed bed reactor until the reactor pressure reached 3 MPa, maintaining a space velocity of 33000 mLh-1gcat-1;

[0038] The reaction time was maintained at an initial reaction temperature of 200°C for 2 h, and then the reaction time at each reaction temperature point was maintained for 1 h.

[0039] The temperature range for catalyst activity evaluation was 200°C to 450°C, with a heating rate of 3°C min-1. All products were detected online in real time by a gas chromatograph, and data at each temperature point was collected and analyzed for each gas component. The pipe between the outlet of the fixed bed reactor and the inlet of the gas chromatograph was wrapped with a heating tape at a temperature of 120°C to prevent methanol condensation.

[0040] Specifically, the outer surface of the quartz tube 210 is sleeved with a protective member 220 for protecting and isolating the quartz tube 210, and the surface of the protective member 220 is inlaid with an observation window 221, and the observation window 221 is made of a transparent material to facilitate observation of the catalytic situation in the quartz tube 210, wherein the observation windows 221 distributed on the surface of the plurality of protective members 220 are in a ring shape when in a stationary state, and the protective member 220 is preferably made of industrial grade stainless steel;

[0041] Specifically, the middle section of the inner cavity of the quartz tube 210 is provided with quartz sand 211, catalyst 212 and sand core 213 from top to bottom, and the bottom of the protective member 220 is provided with a stabilizing support 240, and the stabilizing support 240 is movably installed at the bottom of the inner cavity of the electric furnace 110, and the stabilizing support 240 can be used to assist in supporting the protective member 220 and the quartz tube 210, thereby increasing their stability;

[0042] like Figure 4 , Figure 7-Figure 8 As shown, the end of the quartz tube 210 and the end located in the inner cavity of the electric furnace 110 is penetrated by a loading seat 300, and the end of the loading seat 300 penetrates to the outside of the electric furnace 110. The end of the loading seat 300 and the end located outside the electric furnace 110 is installed with an assembly base shell 320, and the assembly base shell 320 is used to assemble the mixing tube 420 and the conveying base 500;

[0043] Among them, a slide groove 301 is opened at the end of the inner cavity of the loading seat 300, and the support rod body 310 is annular and has the same shape as the annular seat 530, and the bottom of the assembly base shell 320 is fastened to the top of the loading seat 300 by bolts, and the support rod body 310 is installed at the bottom of the inner cavity of the loading seat 300; and the end of the support rod body 310 is connected to the end of the loading seat 300 by bolt fasteners, and the surface of the support rod body 310 is provided with an auxiliary support plate body 311 through a bearing movable sleeve, and the surface of the auxiliary support plate body 311 is annularly inlaid with multiple sheaths, which are used in conjunction with the distribution tube body 520 to increase the stability of the distribution tube body 520 when it rotates;

[0044] like Figure 3-Figure 4 and Figure 7-Figure 8 As shown, a mixing tube 420 is provided at the end of the electric furnace 110; in order to guide the gas material, the end of the mixing tube 420 is connected to a connecting pipe 400 through a sealing bearing seal, and one end of the connecting pipe 400 is connected to a guide pipe body 410.

[0045] The guide tube 410 is connected to the CO 2 +H 2 Gas cylinders and N 2 connection, while at the same time with the CO 2 +H 2 Gas cylinders and N 2 The pipeline connected to the gas cylinder is equipped with a preheating furnace and a thermocouple.

[0046] like Figure 3-Figure 4 and Figure 7-Figure 8 As shown, a plurality of conveying bases 500 are installed on the outer surface of the mixing tube 420, and the two cooperate to guide the gas material. There are multiple conveying bases 500 and they are symmetrically sleeved on the surface of the mixing tube 420 from top to bottom, and the surface of the mixing tube 420 is provided with through holes, so that the mixing tube 420 is connected with the inner cavity of the conveying base 500 through the through holes, and the conveying base 500 is movably sleeved on the outer surface of the mixing tube 420 through a sealing bearing, and at the same time, the outer surface of the conveying base 500 penetrates to the outer surface of the assembly base shell 320, and the connection between the conveying base 500 and the assembly base shell 320 is in sliding contact.

[0047] Thus, the gas material fed into the connecting pipe 400 enters the mixing tube 420, and is respectively led to different delivery bases 500 through the mixing tube 420, so as to be subsequently led to multiple quartz tubes 210;

[0048] Specifically, the outer surface of the delivery base 500 is connected to the delivery tube body 510, and the surface of the delivery tube body 510 is installed with a valve body 511 for opening and closing the inner cavity thereof, so that under the joint action of the delivery base 500, the delivery tube body 510 and the valve body 511, the gas material in the mixing tube 420 is transported according to the required amount, so that the gas material is transported to the corresponding quartz tube 210 respectively;

[0049] As a further optimization of this solution, the surface of the delivery pipe body 510 may also be equipped with a flow meter for controlling the quantitative delivery of the gas material;

[0050] Specifically, the bottom of the delivery tube 510 penetrates the inner cavity of the loading seat 300 and is connected to the distribution tube 520, and the bottom of the distribution tube 520 is connected to the end of the catheter 230, wherein the surface of the delivery tube 510 is in sliding contact with the inner cavity of the slide groove 301, and the surface of the distribution tube 520 penetrates the inner surface of the sheath and is in sliding contact with it, thereby increasing the stability of the subsequent delivery tube 510 and the quartz tube 210 during rotation;

[0051] Specifically, an annular seat 530 is slidably provided at the end of the loading seat 300, and the annular seat 530 is located at the upper end of the slide groove 301, and an auxiliary push piece 531 is connected to the end of the annular seat 530, and a plurality of empty grooves for use with the conveying tube body 510 are opened on the surface of the annular seat 530, and the surface of the conveying tube body 510 extends to the inner cavity of the empty groove, and there are a plurality of auxiliary push pieces 531, so that when the user pushes the auxiliary push piece 531, the annular seat 530 can be driven to move the conveying tube body 510 to drive the conveying tube body 510 to move. The base 500 slides, and the conveying base 500 and the dispensing tube 420 are movably connected to avoid interference of the conveying base 500 with the connecting pipe 400. At the same time, the conveying tube body 510 is connected to the quartz tube 210 through the distribution tube body 520, and then can drive multiple quartz tubes 210 to change their positions in the electric furnace 110. When the electric furnace 110 is opened, the observation window 221 can be used to observe the multiple quartz tubes 210 in the electric furnace 110, which is convenient for subsequent photothermal reaction.

[0052] The specific working principle of a carbon dioxide high-temperature hydrogenation catalyst evaluation device with closed observation is as follows: a plurality of quartz tubes 210 are arranged in an annular shape in an electric furnace 110, and the plurality of quartz tubes 210 can simultaneously process a plurality of different catalysts in the electric furnace 110, and a layer of protective member 220 is sleeved on the outer surface of the quartz tube 210, and an observation window 221 is installed on the surface of the protective member 220, which can isolate and protect the quartz tube 210 and facilitate observation and photothermal reaction; and the observation windows 221 arranged on the surface of the plurality of protective members 220 cooperate to form an annular transparent shape when in a stationary state, so as to simultaneously observe the internal conditions of the plurality of quartz tubes 210;

[0053] To avoid blind spots and prevent the quartz tubes 210 around the blind spots from being inconvenient for the operator to observe, the operator only needs to rotate the auxiliary pusher 531 to move the delivery tube 510, and then drive the quartz tubes 210 to move through the distribution tube 520, so that the quartz tubes 210 at the blind spots are moved in front of the operator, which is convenient for the operator to observe multiple quartz tubes 210;

[0054] When the position of the quartz tube 210 is adjusted, in order to avoid the connecting pipe 400 interfering with the movement of the quartz tube 210, when the quartz tube 210 is displaced by the conveying tube body 510, the conveying tube body 510 simultaneously drives the conveying base 500 to rotate, and the conveying base 500 is in a sliding contact state with the dispensing tube 420 and the assembly base shell 320, so that the displacement of the conveying tube body 510 can only drive the displacement of the conveying base 500, but cannot drive the displacement of the dispensing tube 420, thereby avoiding the dispensing tube 420 interfering with the movement of the quartz tube 210.

[0055] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation, characterized in that: The invention comprises an evaluation body (100), wherein an electric furnace (110) is installed on one side of the evaluation body (100), and a catalytic component (200) is installed in the electric furnace (110), and the catalytic component (200) comprises a quartz tube (210), and the quartz tube (210) is a plurality of quartz tubes (210) arranged in a ring shape in the inner cavity of the electric furnace (110), and the outer surface of the quartz tube (210) is sleeved with a protective member (220) for protecting and isolating the quartz tube (210), and an observation window (221) is embedded and installed on the surface of the protective member (220), and a mixing tube (420) is provided at the end of the electric furnace (110), and a plurality of conveying bases (500) are installed on the outer surface of the mixing tube (420).

2. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 1 is characterized in that: A refractory lining (120) is installed in the inner cavity of the electric furnace (110) and on the outer side of the quartz tube (210), and quartz sand (211), a catalyst (212) and a sand core (213) are respectively arranged from top to bottom in the middle section of the inner cavity of the quartz tube (210), and a stabilizing support seat (240) is arranged at the bottom of the protective member (220).

3. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 2 is characterized in that: A loading seat (300) is provided through the end of the quartz tube (210) and located in the inner cavity of the electric furnace (110), and an assembly base shell (320) is installed at the end of the loading seat (300) and located outside the electric furnace (110). The assembly base shell (320) is used to assemble the mixing tube (420) and the conveying base (500).

4. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 3 is characterized in that: A sliding groove (301) is provided at the end of the inner cavity of the loading seat (300), and a supporting rod body (310) is installed at the bottom of the inner cavity of the loading seat (300).

5. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 4 is characterized in that: The end of the support rod (310) is connected to the end of the loading seat (300) via a bolt fastener, and the surface of the support rod (310) is provided with an auxiliary support plate (311) via a bearing movable sleeve, and the surface of the auxiliary support plate (311) is annularly inlaid with a plurality of sheaths.

6. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 5, characterized in that: The end of the mixing tube (420) is movably connected to a connecting pipe (400), and one end of the connecting pipe (400) is connected to a guide pipe body (410).

7. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 6 is characterized in that: The conveying bases (500) are multiple and symmetrically sleeved on the surface of the mixing tube (420), and the surface of the mixing tube (420) is provided with through holes, while the outer surface of the conveying base (500) penetrates to the outer surface of the assembly base shell (320).

8. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 7, characterized in that: The outer surface of the delivery base (500) is connected to a delivery tube body (510), and a valve body (511) for opening and closing the inner cavity of the delivery tube body (510) is installed on the surface of the delivery tube body (510).

9. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 8, characterized in that: The bottom of the conveying tube body (510) penetrates into the inner cavity of the loading seat (300) and is connected to the distribution tube body (520), and the bottom of the distribution tube body (520) is connected to the end of the catheter (230), wherein the surface of the conveying tube body (510) is in sliding contact with the inner cavity of the slide groove (301).

10. The carbon dioxide high temperature hydrogenation catalyst evaluation device with closed observation according to claim 9, characterized in that: An annular seat (530) is slidably provided at the end of the loading seat (300), and an auxiliary pushing member (531) is connected to the end of the annular seat (530).

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