A catalyst impregnation device

Abstract

The utility model discloses a catalyst impregnation device relates to catalyst impregnation technical field, include: catalyst particle loading bin, impregnation liquid storage and vacuum equipment, catalyst particle loading bin is located above impregnation liquid storage, and catalyst particle loading bin is communicated with impregnation liquid storage through the communicating pipe, and the one end of communicating pipe is close to impregnation liquid storage and is inserted below the liquid level of impregnation liquid storage, and vacuum equipment is communicated with catalyst particle loading bin, in the utility model, the air in catalyst particle loading bin is extracted through vacuum equipment to provide negative pressure, and the impregnation liquid in impregnation liquid storage is automatically passed through communicating pipe under the influence of pressure and enters catalyst particle loading bin to complete impregnation, in the impregnation process, the air in catalyst particle loading bin is extracted, reduces the oxidation degree of impregnation liquid, ensures the impregnation effect, and catalyst particle and impregnation liquid carry out passive contact, and catalyst particle does not move, reduces the attrition of catalyst particle, and further improves the impregnation effect.

Description

Technical Field

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

[0002] Currently, catalyst impregnation equipment, both domestically and internationally, is generally a non-standard product, often designed and customized by companies based on their own catalyst production processes and scale. Catalyst impregnation equipment models are mostly rotary and cage-type. The former often includes a spray system, using a rotating hemispherical cavity to rotate the catalyst while simultaneously adsorbing the impregnation liquid from the top spray system; this type is mostly used in saturated impregnation scenarios. The latter occupies a large area and often generates wastewater. It involves immersing the catalyst in a stainless steel cage into the impregnation liquid, and after adsorption is complete, raising the catalyst to an appropriate height and allowing the impregnation liquid to drain under gravity.

[0003] Currently, rotary impregnation equipment often requires the use of a spray system, which has the following drawbacks: First, the nozzles are exposed inside the rotating chamber, and the catalyst carrier particles generate a large amount of dust during rotation, easily clogging the nozzles. Second, after the impregnation liquid is atomized, it remains in the air for a long time, easily absorbing dust from the air, and the easily oxidized components in the impregnation liquid also undergo denaturation. Third, the rotation process leads to increased wear between the catalyst carrier particles, producing a large amount of powder that mixes with the impregnation liquid to form slurry that deposits at the bottom of the catalyst, resulting in an uneven catalyst appearance. Cage impregnation, on the other hand, has the following drawbacks: First, it has a low level of automation, requiring frequent manual intervention. Second, it often results in over-impregnation, and the impregnation liquid is easily contaminated, leading to poor catalyst uniformity. Third, it is only suitable for over-impregnation; for equal-volume impregnation, the uniformity is poor.

[0004] Therefore, there is an urgent need for a catalyst impregnation device with good impregnation effect. Utility Model Content

[0005] The purpose of this invention is to provide a catalyst impregnation device to solve the problems existing in the prior art. It uses a vacuum device to pump the impregnation liquid in the impregnation liquid storage tank into the catalyst particle loading tank to improve the impregnation effect.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a catalyst impregnation device, including a catalyst particle loading chamber, an impregnation liquid storage chamber, and a vacuum pumping device. The catalyst particle loading chamber is located above the impregnation liquid storage chamber, and the catalyst particle loading chamber and the impregnation liquid storage chamber are connected by a connecting pipe. One end of the connecting pipe near the impregnation liquid storage chamber extends below the liquid surface of the impregnation liquid storage chamber. The vacuum pumping device is connected to the catalyst particle loading chamber.

[0007] Preferably, the inlet of the connecting pipe near the catalyst particle loading chamber is spaced apart from the inner bottom wall of the catalyst particle loading chamber.

[0008] Preferably, a screen is provided at the opening of the connecting pipe near the catalyst particle loading chamber, and the aperture of the screen is smaller than the particle size of the catalyst particles.

[0009] Preferably, both the catalyst particle loading chamber and the impregnation liquid storage chamber are housed within a box, and the bottom of the box has an equipment cavity, with the vacuum pump of the vacuuming equipment located inside the equipment cavity.

[0010] Preferably, the catalyst particle loading chamber and the impregnation liquid storage chamber are both spaced apart from the inner wall of the box to form a heat exchange medium cavity for introducing heat exchange medium. The heat exchange medium cavity is equipped with a heating device, or the heat exchange medium cavity is connected to the heat exchange medium circulation passage.

[0011] Preferably, a thermometer is installed in the catalyst particle loading chamber, and both the thermometer and the heating device are electrically connected to the control system.

[0012] Preferably, both the catalyst particle loading chamber and the box body are provided with glass windows for observing the internal liquid level at relatively different positions.

[0013] Preferably, the catalyst particle loading chamber has an opening at the top, and the top of the chamber is connected to a pressure-bearing cover plate via a quick-opening structure. When the pressure-bearing cover plate is engaged with the chamber, the pressure-bearing cover plate seals the opening of the catalyst particle loading chamber.

[0014] Preferably, a level gauge is installed in the catalyst particle loading chamber, and both the level gauge and the vacuum pumping equipment are electrically connected to the control system.

[0015] Preferably, the outer peripheral wall of the connecting pipe is provided with external threads, and both the catalyst particle loading chamber and the impregnation liquid storage chamber are provided with threaded holes that match the external threads.

[0016] The present invention achieves the following main technical effects compared to the prior art: Air is extracted from the catalyst particle loading chamber using a vacuum pump to create negative pressure. Under this pressure, the impregnation solution in the impregnation solution storage chamber automatically enters the catalyst particle loading chamber through a connecting pipe to complete the impregnation process. During the impregnation process, the air in the catalyst particle loading chamber is removed, reducing the oxidation level of the impregnation solution and ensuring the impregnation effect. The impregnation solution becomes more stable, and the residual impregnation solution can be used for the next impregnation process. Furthermore, the catalyst particles are in passive contact with the impregnation solution, preventing the catalyst particles from moving and reducing their wear, thus further improving the impregnation effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the catalyst impregnation device in an embodiment of the present invention; The components include: 1. Pressure-bearing cover plate; 2. Catalyst particle loading chamber; 3. Connecting pipe; 4. Impregnating liquid storage chamber; 5. Heat exchange medium chamber; 6. Control system; 7. Vacuum pump; and 8. Suction pipe. Detailed Implementation

[0019] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] The purpose of this invention is to provide a catalyst impregnation device to solve the problems existing in the prior art. It uses a vacuum pump to draw the impregnation liquid from the impregnation liquid storage tank into the catalyst particle loading tank to improve the impregnation effect.

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Please refer to the following: Figure 1As shown, a catalyst impregnation device is provided, including a catalyst particle loading chamber 2, an impregnation liquid storage chamber 4, and a vacuum device. The catalyst particle loading chamber 2 has a loading port for placing catalyst particles into it. A cover plate is designed at the loading port to seal it. The impregnation liquid storage chamber 4 has an outlet for draining the impregnation liquid after operation. The catalyst particle loading chamber 2 is located above the impregnation liquid storage chamber 4, and the two are connected by a connecting pipe 3. Impregnation liquid can be injected into the catalyst particle loading chamber 2 and automatically flow into the impregnation liquid storage chamber 4 through the connecting pipe 3. Alternatively, an additional inlet can be provided on the impregnation liquid storage chamber 4 for injecting impregnation liquid. One end of the connecting pipe 3 near the impregnation liquid storage chamber 4 extends below the liquid surface in the impregnation liquid storage chamber 4. The liquid level in the impregnation liquid storage tank 4 needs to be lower than the horizontal height of the inner top wall of the impregnation liquid storage tank 4. The vacuum equipment is connected to the catalyst particle loading tank 2. When there is impregnation liquid in the impregnation liquid storage tank 4 and catalyst particles are placed in the catalyst particle loading tank 2, the vacuum equipment is activated to extract the air in the catalyst particle loading tank 2 to provide negative pressure. Under the influence of pressure, the impregnation liquid in the impregnation liquid storage tank 4 automatically enters the catalyst particle loading tank 2 through the connecting pipe 3 to complete the impregnation. During the impregnation process, the air in the catalyst particle loading tank 2 is extracted, reducing the oxidation degree of the impregnation liquid and ensuring the impregnation effect. The impregnation liquid is more stable, and the residual impregnation liquid can continue to the next impregnation process. Moreover, the catalyst particles are in passive contact with the impregnation liquid, and the catalyst particles do not move, reducing the wear of the catalyst particles and further improving the impregnation effect.

[0023] The port of the connecting pipe 3 can be set close to the inner bottom wall of the impregnation liquid storage tank 4 to ensure that sufficient impregnation liquid can enter the catalyst particle loading tank 2.

[0024] Multiple connecting pipes 3 can be installed, and the multiple connecting pipes 3 are arranged at equal intervals to improve the connection effect between the two compartments.

[0025] The catalyst particle loading chamber 2, the impregnation liquid storage chamber 4, and the connecting pipe 3 can all be made of stainless steel to improve their service life.

[0026] In one embodiment, since the catalyst particles will generate leached powder during the impregnation process, this leached powder will be deposited at the bottom and easily block the connecting pipe 3. Therefore, the connecting pipe 3 is designed to be spaced apart from the inner bottom wall of the catalyst particle loading chamber 2 near the pipe opening. The spacing height can be set as needed. In this embodiment, it is set to 1 cm. By setting the spacing, sufficient deposition height is allowed, which can effectively prevent the leached powder from blocking the connecting pipe 3.

[0027] To prevent catalyst particles from entering the connecting pipe 3, a screen is installed at the opening of the connecting pipe 3 near the catalyst particle loading chamber 2. The screen has a pore size smaller than the particle size of the catalyst particles, and the screen blocks the catalyst particles.

[0028] In one embodiment, both the catalyst particle loading chamber 2 and the impregnation liquid storage chamber 4 are housed within a box, which protects the two chambers. The bottom of the box has an equipment cavity. The vacuum equipment includes a vacuum pump 7 and a suction pipe 8. The vacuum pump 7 is located inside the equipment cavity, which can effectively reduce vibration and noise. In other embodiments, the vacuum pump 7 can also be located outside the box.

[0029] In one embodiment, both the catalyst particle loading chamber 2 and the impregnation liquid storage chamber 4 are spaced apart from the inner wall of the box to form a heat exchange medium chamber 5 for introducing the heat exchange medium. A heating device is installed in the heat exchange medium chamber 5, and the heat exchange medium is heat transfer oil. The temperature of the heat transfer oil is directly controlled by the heating device. Alternatively, the heat exchange medium chamber 5 is connected to a heat exchange medium circulation passage. The heat exchange medium in the heat exchange medium circulation passage can be water. A high-temperature machine and a delivery pump are installed on the heat exchange medium circulation passage to heat and circulate the heat exchange medium. An additional cold circulation passage can be provided. Adsorption heat is generated during catalyst impregnation. When the temperature of the heat exchange medium is high, it can be introduced into the cold circulation passage for cooling. The cold circulation passage is also connected to the heat exchange medium chamber 5. A chiller and a delivery pump are installed on the cold circulation passage to cool and circulate the heat exchange medium.

[0030] A thermometer is installed in the catalyst particle loading chamber 2. The thermometer and heating device are electrically connected to the control system 6 to achieve automatic temperature control. When a heat exchange medium circulation path or a cold circulation path is set, the control system 6 is no longer needed to control the temperature. The high-temperature machine or the refrigeration machine can be controlled directly.

[0031] In one embodiment, glass windows for observing the internal liquid level are provided at relative positions on the catalyst particle loading chamber 2 and the box body. The staff can conveniently view the liquid level in the catalyst particle loading chamber 2 through the glass windows. The glass windows are designed on the side walls of the chamber body and the box body, so that the liquid level changes can be observed more intuitively.

[0032] When a box is installed, an opening can be made on the top of the catalyst particle loading chamber 2, which is the loading port. The top of the box is connected to the pressure-bearing cover plate 1 through a quick-opening structure. When the pressure-bearing cover plate 1 is fastened to the box, the pressure-bearing cover plate 1 seals the opening of the catalyst particle loading chamber. That is, the pressure-bearing cover plate 1 used for sealing the top of the box itself is used as the cover plate to seal the loading port.

[0033] A sealing ring can be installed on the pressure cover plate 1 to improve the sealing effect on the filling port.

[0034] In one embodiment, a level gauge is installed in the catalyst particle loading chamber 2. The level gauge and the vacuum pump are both electrically connected to the control system 6. The level gauge can monitor the liquid level. By setting a final liquid level height, when the level gauge detects that the liquid level in the catalyst particle loading chamber 2 has reached the final liquid level height, the vacuum pumping is stopped. The final liquid level height can be set as needed. When equal volume impregnation is required, the final liquid level height can be set to be slightly higher than the horizontal height of the top surface of the catalyst particle layer in the catalyst particle loading chamber 2. When excessive impregnation is required, the final liquid level height can be set to be higher than the horizontal height of the top surface of the catalyst particle layer in the catalyst particle loading chamber 2. The design of the level gauge helps to improve the automation level of the device. In this embodiment, it is set to be 1-2 mm higher than the catalyst particles.

[0035] The control system 6 can be used to control the suction rate of the vacuum equipment, and the control system 6 can be installed in the equipment cavity.

[0036] In one embodiment, the outer peripheral wall of the connecting pipe 3 is provided with external threads, and both the catalyst particle loading chamber 2 and the impregnation liquid storage chamber 4 are provided with threaded holes that match the external threads, so as to realize the threaded connection of the connecting pipe 3 and improve the ease of installation and disassembly of the device; in other embodiments, the connecting pipe 3, the catalyst particle loading chamber 2 and the impregnation liquid storage chamber 4 can also be integrated into one unit to improve the structural strength.

[0037] In one embodiment, an electrically controlled air valve can be installed on the catalyst particle loading chamber 2. The air valve is electrically connected to the control system 6 and is used to open after impregnation is completed, so that air enters the catalyst particle loading chamber 2, causing the impregnation liquid in the catalyst particle loading chamber 2 to fall back, thereby achieving the draining effect.

[0038] In actual use, with the machine powered off, the operator opens the top pressure cover 1 via the quick-opening mechanism, pours an appropriate amount of impregnation liquid into the catalyst particle loading chamber 2, and the impregnation liquid flows into the impregnation liquid storage chamber 4. Then, an appropriate amount of catalyst particles are poured into the catalyst particle loading chamber 2, the top pressure cover 1 is locked, the temperature control is set as needed, and then the vacuum system is turned on and the vacuum rate is adjusted. Depending on the time, the following changes will occur: First, air in the catalyst particle loading chamber 2 will be preferentially extracted (reducing the impact of oxygen on impregnation), and the impregnation liquid level will rise under the pressure difference. Second, air adsorbed inside the catalyst particles will be extracted, increasing the water absorption rate of the catalyst particles and improving the catalyst particle loading capacity. Third, due to pressure changes, the impregnation liquid level in the impregnation liquid storage chamber 4 will gradually rise and enter the catalyst particle loading chamber 2 through the connecting pipe 3, causing the catalyst at the bottom of the catalyst particle loading chamber 2 to... In the initial stage of adsorption, the liquid level in the catalyst particle adsorption solution does not rise and may even decrease. As the adsorption of this layer of catalyst particles reaches saturation, the liquid level continues to rise, and the next layer continues to adsorb. Finally, when the top layer is saturated and the liquid level begins to rise to the control height (the set final liquid level height), the control system 6 cuts off the power supply to the vacuum system and opens the air valve, connecting the catalyst particle loading chamber 2 to the external atmospheric pressure. The impregnation liquid remaining in the catalyst particle loading chamber 2 will slowly fall back into the impregnation liquid storage chamber 4, which also serves to drain the water. After the liquid level gauge detects that there is no residual impregnation liquid in the catalyst particle loading chamber 2 (the minimum liquid level height can be set as needed; when the liquid level reaches the minimum liquid level height, it means there is no residue), the control system 6 closes the air valve to prevent outside air from entering and to prevent further oxidation of the catalyst particles. After a short while, the pressure plate 1 can be opened, and the catalyst particles can be taken out for subsequent drying and calcination procedures.

[0039] This device is well adapted to impregnated catalysts and has good compatibility with irregularly shaped supports such as spherical, columnar, and clover-shaped supports. It is also suitable for impregnating shaped supports such as zeolite, alumina, and activated carbon.

[0040] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0041] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A catalyst impregnation apparatus, characterized in that, The device includes a catalyst particle loading chamber, an impregnation liquid storage chamber, and a vacuum pump. The catalyst particle loading chamber is located above the impregnation liquid storage chamber. The catalyst particle loading chamber and the impregnation liquid storage chamber are connected by a connecting pipe. One end of the connecting pipe near the impregnation liquid storage chamber extends below the liquid surface of the impregnation liquid storage chamber. The vacuum pump is connected to the catalyst particle loading chamber.

2. The catalyst impregnation apparatus according to claim 1, characterized in that, The inlet of the connecting pipe near the catalyst particle loading chamber is spaced apart from the inner bottom wall of the catalyst particle loading chamber.

3. The catalyst impregnation apparatus according to claim 1, characterized in that, A screen is provided at the opening of the connecting pipe near the catalyst particle loading chamber, and the aperture of the screen is smaller than the particle size of the catalyst particles.

4. The catalyst impregnation apparatus according to claim 1, characterized in that, Both the catalyst particle loading chamber and the impregnation liquid storage chamber are housed within a box, and the bottom of the box has an equipment cavity, where the vacuum pump of the vacuuming equipment is located.

5. The catalyst impregnation apparatus according to claim 4, characterized in that, The catalyst particle loading chamber and the impregnation liquid storage chamber are both spaced apart from the inner wall of the box to form a heat exchange medium cavity for introducing heat exchange medium. The heat exchange medium cavity is equipped with a heating device, or the heat exchange medium cavity is connected to the heat exchange medium circulation passage.

6. The catalyst impregnation apparatus according to claim 5, characterized in that, A thermometer is installed inside the catalyst particle loading chamber, and both the thermometer and the heating device are electrically connected to the control system.

7. The catalyst impregnation apparatus according to claim 4, characterized in that, The catalyst particle loading chamber and the box body are both equipped with glass windows at relative positions for observing the internal liquid level.

8. The catalyst impregnation apparatus according to claim 4, characterized in that, The catalyst particle loading chamber has an opening at the top, and the top of the chamber is connected to a pressure-bearing cover plate via a quick-opening structure. When the pressure-bearing cover plate is engaged with the chamber, it seals the opening of the catalyst particle loading chamber.

9. The catalyst impregnation apparatus according to claim 1, characterized in that, The catalyst particle loading chamber is equipped with a level gauge, and both the level gauge and the vacuum pumping equipment are electrically connected to the control system.

10. The catalyst impregnation apparatus according to claim 1, characterized in that, The outer peripheral wall of the connecting pipe is provided with external threads, and both the catalyst particle loading chamber and the impregnation liquid storage chamber are provided with threaded holes that match the external threads.

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