Electrostatic separation device and method for catalytic cracking slurry

Abstract

This invention provides an electrostatic separation device for catalytic cracking slurry, comprising a separation mechanism including a tank, an annular baffle disposed within the tank and dividing the tank into a first chamber and a second chamber, a power supply component disposed within the first chamber, a guide component sleeved outside the power supply component and communicating with the second chamber, packing material capable of being inserted into the first chamber, a first injection component for injecting catalytic cracking slurry into the first chamber, and a second injection component for injecting mixed gas into the second chamber. The contact area of ​​the packing material can form an electric field under the action of the power supply component, and the electric field range can be further expanded under the action of the mixed gas, thereby promoting the electrostatic separation of the catalytic cracking slurry in the first chamber. This invention improves the adsorption effect of the packing material on catalyst particles in the catalytic cracking slurry.

Description

Technical Field

[0001] This invention relates to the field of catalytic cracking slurry desolidification and purification, specifically to an electrostatic separation device for catalytic cracking slurry, and a method for electrostatic separation of catalytic cracking slurry using the electrostatic separation device. Background Technology

[0002] Catalytic cracking slurry contains a large amount of saturated hydrocarbons and aromatics, which are high-quality raw materials for the production of carbon black, needle coke, carbon fiber, and other products. However, the catalyst particles contained in the catalytic cracking slurry can severely restrict its processing.

[0003] Currently, there are many methods for removing catalyst particles from catalytic cracking slurry. Among them, electrostatic separation has attracted widespread attention due to its characteristics of low pressure drop and good separation performance.

[0004] Electrostatic separation for removing catalyst particles from catalytic cracking slurry typically utilizes a high-voltage direct current electric field to polarize the packing material within the device, creating a high electric field intensity region near the packing contact points. Consequently, catalyst particles in the catalytic cracking slurry are adsorbed onto the surface near the packing contact points under the influence of dielectric force, thus achieving the removal of catalyst particles from the catalytic cracking slurry.

[0005] However, the electrostatic separation method still has the following problems when actually removing catalyst particles from catalytic cracking slurry.

[0006] Firstly, only the surface near the contact point of the packing has an adsorption effect on catalyst particles in the catalytic cracking slurry, while other surfaces of the packing have virtually no adsorption effect. This results in low removal efficiency and poor performance of the method, making it difficult to meet production requirements.

[0007] Secondly, existing technologies include increasing voltage to improve separation efficiency. However, this approach poses significant safety risks to operations, making it difficult to guarantee personnel safety. Furthermore, the actual production results after increasing the voltage are severely mismatched with the production costs, leading to a sharp increase in production costs.

[0008] Therefore, it is desirable in the art to provide an electrostatic separation device for catalytic cracking slurry to solve the aforementioned technical problems. Summary of the Invention

[0009] The purpose of this invention is to provide an electrostatic separation device for catalytic cracking slurry, which can increase the range of the high-voltage electric field formed by the packing under the action of the power supply to adsorb catalyst particles in the catalytic cracking slurry by attaching the mixed gas to the surface of the packing. This allows for more complete removal of catalyst particles from the catalytic cracking slurry.

[0010] According to a first aspect of the present invention, an electrostatic separation device for catalytic cracking slurry is provided, comprising a separation mechanism including a tank, an annular baffle disposed within the tank and dividing the tank into a first chamber and a second chamber, and a power supply component disposed within the first chamber.

[0011] A guide that is fitted over the power supply component and communicates with the second chamber.

[0012] A first injection device for injecting catalytic cracking slurry into the first chamber.

[0013] A second injection device for injecting mixed gas into the second chamber, and

[0014] The packing material that can be inserted into the first chamber

[0015] The contact area of ​​the packing can form an electric field under the action of the power supply, and can further expand the electric field range under the action of the mixed gas, thereby promoting the electrostatic separation of the catalytic cracking slurry in the first chamber.

[0016] In one embodiment, the packing includes a plurality of glass packing balls, with a plurality of protrusions and depressions distributed on the surface of the packing balls. The mixed gas can be separated under the action of the protrusions to break up the colloidal system of the catalytic cracking slurry, and the mixed gas can adhere to the depressions to expand the electric field range of the packing.

[0017] In one embodiment, the spherical roughness of the filler is in the range of N9 to N12.

[0018] In one embodiment, the mixed gas comprises C4F7N and an inert gas, wherein the C4F7N accounts for 5-20% of the mixed gas.

[0019] In one embodiment, the mixed gas is C4F7N / CO2.

[0020] In one embodiment, the power supply component is an electrode post, and a plurality of guides are equidistantly arranged along the axial direction of the electrode post. Each guide includes a first guide portion configured in an annular shape and a plurality of second guide portions configured in a rod shape extending radially outward from the first guide portion, wherein the second guide portions extend through the annular baffle and communicate with the second chamber.

[0021] In one embodiment, a plurality of equally spaced channels are provided on both the first guide portion and the second guide portion, and a semi-permeable membrane that allows only the mixed gas to pass through is provided on each channel.

[0022] In one embodiment, the electrostatic separation device further includes a sieve plate disposed in the first chamber and below the power supply component, wherein the diameter of the sieve holes and the inner diameter of the first guide portion are both smaller than the diameter of the packing material.

[0023] In one embodiment, the electrostatic separation device further includes a first end cap disposed above the tank, at least one first injection element disposed on the radially inner side of the first end cap, and at least one second injection element disposed on the radially outer side of the first end cap.

[0024] In one embodiment, the electrostatic separation device further includes a heating chamber sleeved on the outside of the tank and used to contain heat transfer oil, a first switching valve disposed at the bottom of the heating chamber, and a plurality of heating rods disposed longitudinally and equidistantly within the heating chamber, wherein the heating rods are all radially mounted on the inner circumferential surface of the heating chamber.

[0025] In one embodiment, the electrostatic separation device further includes a second switching valve disposed below the sieve plate, the second switching valve being in communication with the first chamber.

[0026] In one embodiment, the electrostatic separation device further includes a second end cap for sealing the heating chamber, the second end cap being composed of two cover plates configured in a partially annular shape joined together.

[0027] According to a second aspect of the present invention, a method for electrostatically separating catalytic cracking slurry using an electrostatic separation apparatus as described above is provided, comprising the following steps:

[0028] S1. Power on the power supply component to create an electric field in the contact area of ​​the packing, and inject catalytic cracking slurry into the first chamber of the tank through the first injection component.

[0029] S2. Inject the mixed gas into the second chamber of the tank through the second injection device, and transport the mixed gas to the first chamber through the channel on the guide, so that the mixed gas comes into contact with the packing and further expands the electric field range, thereby promoting the electrostatic separation of the catalytic cracking slurry in the first chamber.

[0030] Compared with the prior art, the advantages of the present invention are as follows:

[0031] Firstly, this invention uses packing balls with high surface roughness. Specifically, by having the mixed gas adhere to the surface of the packing, this invention increases the range of the high-voltage electric field formed by the packing under the action of the power supply, which can adsorb catalyst particles in the catalytic cracking slurry. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry, ensuring that higher quality raw materials are obtained after electrostatic separation in the electrostatic separation unit used for catalytic cracking slurry, thus facilitating subsequent production.

[0032] Furthermore, due to their high surface roughness, the filling spheres have distinct depressions and protrusions.

[0033] The recessed portion of the packing ball provides ample space for the mixed gas to adhere, thereby increasing the residence time of the mixed gas. According to the above description, after the mixed gas adheres to the surface of the packing, it significantly increases the range of the high-voltage electric field formed by the packing that can adsorb catalyst particles in the catalytic cracking slurry, thus improving the efficiency of removing catalyst particles from the catalytic cracking slurry.

[0034] The protrusions of the packing balls can, on the one hand, facilitate the ionization of the mixed gas, thereby separating CO2 to effectively disrupt the colloidal system of the catalytic cracking slurry and further reduce its viscosity. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry. On the other hand, the protrusions of the packing balls can facilitate partial discharge, resulting in a large number of opposite polarity charges being generated on the gas side. These opposite polarity charges can be deposited on the recesses of the packing balls under the influence of the electric field, thereby expanding the range of the high-voltage electric field.

[0035] Therefore, the contact area of ​​the packing ball and the surface area outside the contact area of ​​the packing ball in this invention are both high voltage electric field areas, which can effectively improve the adsorption effect of the packing ball on the catalyst particles in the catalytic cracking slurry, thereby obtaining high-quality raw materials after electrostatic separation, which is further beneficial to subsequent production work.

[0036] Secondly, this invention fills the first chamber of the tank with a mixed gas (C4F7N / CO2). This invention improves the electrostatic separation environment of the electrostatic separation unit used for catalytic cracking slurry by using the mixed gas. This will be described in detail below in conjunction with the above content.

[0037] Firstly, because C4F7N / CO2 has good insulation properties, it can ensure that the first chamber of the tank in the electrostatic separation unit for catalytic cracking slurry is always in a low current state, thereby fully guaranteeing the safety of the electrostatic separation process of catalytic cracking slurry in the electrostatic separation unit for catalytic cracking slurry.

[0038] Secondly, the CO2 separated from C4F7N / CO2 gas can dissolve in the catalytic cracking slurry, thereby causing the catalytic cracking slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing the viscosity of the catalytic cracking slurry. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0039] Furthermore, C4F7N / CO2 is an environmentally friendly gas. Therefore, the electrostatic separation unit used for catalytic cracking slurry will not pollute the surrounding environment during operation, thus giving the electrostatic separation unit for catalytic cracking slurry good environmental performance.

[0040] It is easy to understand that filling the first chamber of the tank with a mixed gas (C4F7N / CO2) ensures that the first chamber remains in a low-current state, thereby fully guaranteeing the safety and stability of the electrostatic separation process. Furthermore, this method also allows for the use of higher DC voltages in the electrostatic separation process of this invention.

[0041] Thirdly, the present invention can achieve a dual viscosity reduction effect on catalytic cracking slurry, including the following:

[0042] The first measure to reduce the viscosity of catalytic cracking slurry: CO2 after gas separation of the mixed gas can dissolve in the catalytic cracking slurry, thereby causing the slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing its viscosity. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0043] The second measure to reduce the viscosity of the catalytic cracking slurry is to heat the heat transfer oil in the heating chamber through heat transfer rods, thereby transferring the high temperature of the heat transfer oil to the catalytic cracking slurry in the first chamber of the tank. This reduces the viscosity of the catalytic cracking slurry by high temperature and prevents the catalytic cracking slurry from solidifying, thus enabling more thorough removal of catalyst particles from the catalytic cracking slurry.

[0044] It is easy to understand that by reducing the viscosity of the catalytic cracking slurry, the catalyst particles in the catalytic cracking slurry can be more easily adsorbed by the packing material, thereby improving the efficiency of electrostatic separation in the electrostatic separation unit used for the catalytic cracking slurry. Attached Figure Description

[0045] The invention will now be described in detail with reference to the accompanying drawings, in which:

[0046] Figure 1The schematic diagram illustrates the structure of an electrostatic separation device for catalytic cracking slurry according to the present invention;

[0047] Figure 2 A schematic diagram of a guide element in an electrostatic separation device for catalytic cracking slurry according to the present invention;

[0048] Figure 3 A schematic diagram of a sieve plate in an electrostatic separation device for catalytic cracking slurry according to the present invention;

[0049] Figure 4 This is a schematic diagram of the second end cap in an electrostatic separation device for catalytic cracking slurry according to the present invention.

[0050] In the accompanying drawings, the same parts use the same reference numerals. The drawings are not drawn to scale.

[0051] The meanings of the reference numerals in the attached figures are as follows:

[0052] 101 packing

[0053] 11 Tank body, 111 First chamber, 112 Second chamber, 12 Annular baffle, 13 Power supply components,

[0054] 2. First injection component

[0055] 3. Second injection component

[0056] 4. Guide component, 41. First guide section, 42. Second guide section, 401. Channel

[0057] 5-sieve plate, 501 sieve aperture,

[0058] 6. First end cap

[0059] 71 Heating chamber, 711 Heating rod, 72 First switching valve,

[0060] 8. Second switching valve

[0061] 9 Second end cap, 91 Cover plate. Detailed Implementation

[0062] To make the technical solutions and advantages of the present invention clearer, exemplary embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. Furthermore, without conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0063] The invention will now be further described with reference to the accompanying drawings.

[0064] Figure 1The schematic diagram shows the structure of an electrostatic separation device 100 for catalytic cracking slurry according to the present invention.

[0065] like Figure 1 As shown, according to a first aspect of the present invention, an electrostatic separation device 100 for catalytic cracking slurry is provided, which includes a separation mechanism. The separation mechanism includes a tank 11 and an annular baffle 12. The tank 11 is the main structure of the electrostatic separation device 100 for catalytic cracking slurry. The annular baffle 12 is disposed within the tank 11, and the annular baffle 12 is capable of dividing the tank 11 into a first chamber 111 and a second chamber 112.

[0066] Preferably, the first chamber 111 is located radially inward; the second chamber 112 is located radially outward, and both have independent working spaces.

[0067] Preferably, the tank body 11 is made of stainless steel. The annular baffle 12 is made of insulating, high-temperature resistant material, preferably polytetrafluoroethylene.

[0068] In a preferred embodiment, the present invention is an electrostatic separation device for gas-injected catalytic cracking slurry.

[0069] According to the present invention, such as Figure 1 As shown, the separation mechanism also includes a power supply component 13. Preferably, the power supply component 13 is an electrode post. The power supply component 13 is installed in the first chamber 111 of the tank body 11, and one end of the power supply component 13 is fixed to the first end cap 6 (described below).

[0070] In a preferred embodiment, the power supply unit 13 is located at the center of the tank 11, thereby enabling full and comprehensive discharge into the first chamber 111 of the tank 11, which helps in the subsequent electrostatic separation of the catalytic cracking slurry.

[0071] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a first injection element 2. The first injection element 2 is mounted on the first end cap 6 and communicates with the first chamber 111, thereby enabling the injection of catalytic cracking slurry into the first chamber 111 of the tank 11 through the first injection element 2.

[0072] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a second injection element 3. The second injection element 3 is mounted on the first end cap 6 and communicates with the second chamber 112, thereby enabling the injection of mixed gas into the second chamber 112 of the tank 11 through the second injection element 3.

[0073] In one embodiment, the mixed gas comprises C4F7N and an inert gas, wherein the C4F7N accounts for 5-20% of the mixed gas. Preferably, the mixed gas is C4F7N / CO2. Because C4F7N is more sensitive to an electric field, it accumulates a greater charge, thereby enabling more thorough removal of catalyst particles from the catalytic cracking slurry. This is described below.

[0074] The mixed gas is, for example, C4F7N / CO2. C4F7N / CO2 can improve the electrostatic separation environment of the electrostatic separation unit 100 used for catalytic cracking slurry, including the following:

[0075] Firstly, because C4F7N / CO2 has good insulation properties, it can ensure that the first chamber 111 of the tank 11 in the electrostatic separation device 100 for catalytic cracking slurry is always in a low current state, thereby fully guaranteeing the safety of the electrostatic separation process of catalytic cracking slurry in the electrostatic separation device 100 for catalytic cracking slurry.

[0076] Secondly, the CO2 separated from C4F7N / CO2 gas can dissolve in the catalytic cracking slurry, thereby causing the catalytic cracking slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing the viscosity of the catalytic cracking slurry. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0077] Thirdly, C4F7N / CO2 is an environmentally friendly gas. Therefore, the electrostatic separation device 100 used for catalytic cracking slurry will not pollute the surrounding environment during operation, thus giving the electrostatic separation device 100 for catalytic cracking slurry good environmental performance.

[0078] Preferably, the C4F7N concentration in the C4F7N / CO2 gas is in the range of 5% to 20%. Within this range, the C4F7N / CO2 mixed gas has good insulation properties, thereby ensuring that the first chamber 111 of the tank 11 in the electrostatic separation unit 100 for catalytic cracking slurry is in a low current state, thus fully guaranteeing the safety of the electrostatic separation process.

[0079] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a guide 4. The guide 4 is sleeved on the outer periphery of the power supply unit 13 and can communicate with the second chamber 112, thereby receiving the mixed gas injected into the second chamber 112 of the tank 11 through the second injection unit 3, and further promoting the rapid dispersion of the mixed gas in the second chamber 112 of the tank 11.

[0080] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes packing material 101. The packing material 101 can be inserted into the first chamber 111 of the tank 11, thereby forming an electric field under the action of the power supply 13 to promote electrostatic separation of the mixed gas in the first chamber 111 of the tank 11.

[0081] Preferably, firstly, packing material 101 is placed into the first chamber 111 of the tank 11; then, catalytic cracking slurry is injected into the first chamber 111 of the tank 11 through the first injection device 2; subsequently, mixed gas is injected into the second chamber 112 of the tank 11 through the second injection device 3.

[0082] According to one embodiment of the present invention, the contact area of ​​the packing 101 can form an electric field under the action of the power supply 13, and can further expand the electric field range under the action of the mixed gas, thereby promoting electrostatic separation of the catalytic cracking slurry in the first chamber 111 of the tank 11.

[0083] Preferably, the electric field is a polarized electric field (high voltage electric field), and the voltage range of the high voltage electric field is 3 to 20 kV.

[0084] In one specific embodiment, because the mixed gas can adhere to the surface of the packing 101, the range of the high-voltage electric field formed by the packing 101 that can adsorb catalyst particles in the catalytic cracking slurry is significantly increased, thereby improving the efficiency of removing catalyst particles from the catalytic cracking slurry. As a result, the electrostatic separation device 100 for catalytic cracking slurry can more easily meet production requirements and can more thoroughly remove catalyst particles from the catalytic cracking slurry.

[0085] Currently, in the existing technology, the filler 101 only forms a high-voltage electric field that can adsorb catalyst particles in catalytic cracking slurry near the contact area, while the other surfaces of the filler 101 have basically no adsorption effect.

[0086] Compared to existing technologies, this invention increases the range of the high-voltage electric field formed by the packing 101 under the action of the power supply 13, which can adsorb catalyst particles in the catalytic cracking slurry, by attaching the mixed gas to the surface of the packing 101. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry, ensuring that higher quality raw materials can be obtained after electrostatic separation in the electrostatic separation device 100 for the catalytic cracking slurry, thus facilitating subsequent production.

[0087] In one embodiment of the invention, the packing 101 comprises a plurality of glass packing balls. The packing balls have a high surface roughness, which facilitates their bonding with the gas mixture, as will be described below.

[0088] In addition, the glass packing balls are inexpensive to manufacture, which enables the electrostatic separation unit 100 used for catalytic cracking slurry to effectively reduce the cost of removing catalyst particles from the catalytic cracking slurry.

[0089] In one specific embodiment, the surface of the packing ball has a plurality of protrusions (not shown in the figures) and recesses (not shown in the figures). Preferably, the mixed gas can be separated under the action of the protrusions, thereby disrupting the colloidal system of the catalytic cracking slurry; the mixed gas can adhere to the recesses to expand the electric field range of the packing 101.

[0090] According to one embodiment of the present invention, the recessed portion of the packing ball can provide sufficient adhesion space for the mixed gas, thereby increasing the residence time of the mixed gas. As described above, after the mixed gas adheres to the surface of the packing 101, the range of the high-voltage electric field formed by the packing 101 that can adsorb catalyst particles in the catalytic cracking slurry can be significantly increased, thereby improving the efficiency of removing catalyst particles from the catalytic cracking slurry.

[0091] In other words, when the mixed gas adheres to the recessed part of the packing ball, it can increase the range of the high-voltage electric field formed by the packing 101 that can adsorb the catalyst particles in the catalytic cracking slurry. The recessed part of the packing ball itself can also increase the residence time of the mixed gas, thereby further extending the time for forming a large-scale high-voltage electric field, which in turn allows the catalyst particles to be removed from the catalytic cracking slurry more completely.

[0092] According to one embodiment of the present invention, the protrusions of the packing ball have two advantages, which will be described in detail below.

[0093] Firstly, the protrusions of the packing balls can facilitate the ionization of the mixed gas, thereby separating CO2 to effectively destroy the colloidal system of the catalytic cracking slurry, further reducing the viscosity of the catalytic cracking slurry, thus enabling more thorough removal of catalyst particles from the catalytic cracking slurry.

[0094] As described above, the CO2 separated from the C4F7N / CO2 (referring to the mixed gas) can dissolve in the catalytic cracking slurry, thereby causing the catalytic cracking slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing the viscosity of the catalytic cracking slurry. This allows for a more thorough removal of catalyst particles from the catalytic cracking slurry.

[0095] Secondly, the protrusions of the packing balls can facilitate partial discharge, which leads to the generation of a large number of opposite polarity charges on the gas side. These opposite polarity charges can be deposited on the depressions of the packing balls under the action of the electric field, thereby expanding the range of the high voltage electric field.

[0096] As can be seen from the above description, after the mixed gas adheres to the surface of the packing 101, it can significantly increase the range of the high-voltage electric field formed by the packing 101 that can adsorb catalyst particles in the catalytic cracking slurry, thereby improving the efficiency of removing catalyst particles from the catalytic cracking slurry.

[0097] Furthermore, under long-term DC voltage, the mixed gas will converge on the surface of the packing ball, and the edge of the surface charge of the packing ball will generate a stronger electric field, thereby expanding the intensity gradient of the high-voltage electric field near the packing ball.

[0098] Therefore, compared with traditional electrostatic separators, the contact area of ​​the packing balls and the surface area outside the contact area of ​​the packing balls in this invention are both high-voltage electric field areas, which can effectively improve the adsorption effect of the packing balls on catalyst particles in catalytic cracking slurry, thereby obtaining high-quality raw materials after electrostatic separation, which is further beneficial to subsequent production work.

[0099] In a preferred embodiment, the surface roughness of the packing 101 (referring to the packing ball) is in the range of N9 to N12. For example, when the surface roughness of the packing ball is N12, the protrusions and depressions of the packing ball can achieve the best effect on the mixed gas.

[0100] In one specific embodiment, a plurality of guides 4 are equidistantly arranged along the axial direction of the power supply component 13. In this way, the mixed gas can be released through the guides 4 to various places within the first chamber 111 of the tank body 11, thereby ensuring that the first chamber 111 has good insulation and further improving the adsorption capacity of the packing ball surface for catalyst particles in the catalytic cracking slurry.

[0101] Furthermore, several packing balls are filled between adjacent guide members 4. In this way, the catalytic cracking slurry injected into the first chamber 111 of the tank 11 through the first injection member 2 can pass through the packing balls in the multi-stage guide members 4 during its downward movement, thereby enabling more thorough adsorption of catalyst particles in the catalytic cracking slurry.

[0102] Figure 2 This is a schematic diagram of the guide member 4 in the electrostatic separation device 100 for catalytic cracking slurry according to the present invention.

[0103] In one embodiment, such as Figure 2As shown, the guide 4 includes a first guide portion 41. The first guide portion 41 is configured in a ring shape. Therefore, the guide 4 can be securely mounted on the outer periphery of the power supply unit 13 via the first guide portion 41, thereby ensuring good stability of the guide 4 when it operates within the first chamber 111 of the tank 11.

[0104] In one embodiment, the guide 4 further includes a second guide portion 42. The second guide portion 42 is configured as a rod-like structure, and each second guide portion 42 extends radially outward from the first guide portion 41. Preferably, the spacing between adjacent second guide portions 42 on the same horizontal plane is small, thereby providing a certain degree of restriction on the axial position of the packing 101.

[0105] Furthermore, the free end of the second guide portion 42 extends through the annular baffle 12 inside the tank body 11, thereby communicating with the second chamber 112 of the tank body 11, so as to receive the mixed gas injected into the second chamber 112 of the tank body 11 through the second injection member 3, and further promote the rapid dispersion of the mixed gas in the second chamber 112 of the tank body 11.

[0106] In one embodiment, such as Figure 2 As shown, a plurality of equally spaced channels 401 are provided on the first guide portion 41. Specifically, the plurality of channels 401 are radially arranged on the first guide portion 41. In this way, the mixed gas can be fully released into the first chamber 11 of the tank 11, thereby ensuring that the mixed gas can diffuse within the first chamber 11 of the tank 11.

[0107] In one embodiment, such as Figure 2 As shown, a plurality of equally spaced channels 401 are provided on the second guide portion 42. Specifically, the plurality of channels 401 are radially arranged on the second guide portion 42. In this way, the mixed gas can be fully released into the first chamber 11 of the tank 11, thereby ensuring that the mixed gas can diffuse within the first chamber 11 of the tank 11.

[0108] It is easy to understand that the channels 401 on the first guide portion 41 and the second guide portion 42 are provided with semi-permeable membranes that only allow the mixed gas to pass through.

[0109] Figure 3 This is a schematic diagram of the sieve plate 5 in the electrostatic separation device 100 for catalytic cracking slurry according to the present invention.

[0110] According to the present invention, such as Figure 1 and 3As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a sieve plate 5. The sieve plate 5 is disposed in the first chamber 111 of the tank body 11 and is located below the power supply unit 13, thereby effectively filtering the catalytic cracking slurry when it is released after electrostatic separation.

[0111] Preferably, the sieve plate 5 is made of polytetrafluoroethylene, thereby preventing contact with the power supply component 13 and causing a complete or partial short circuit in the electrostatic separation device 100 for catalytic cracking slurry.

[0112] In a preferred embodiment, the diameter of the sieve aperture 501 of the sieve plate 5 is smaller than the diameter of the packing 101. It is easy to understand that after electrostatic separation, the packing 101 will not flow to the outside along with the catalytic cracking slurry. In other words, the packing 101 will still be in the first chamber 111 of the tank 11, thereby facilitating the next electrostatic separation operation of the catalytic cracking slurry.

[0113] In a preferred embodiment, the inner diameter of the first guide portion 41 is smaller than the diameter of the packing 101. It is easy to understand that after electrostatic separation, the packing 101 will not flow to the outside along with the catalytic cracking slurry; in other words, the packing 101 will remain in the first chamber 111 of the tank 11, thereby facilitating the next electrostatic separation of the catalytic cracking slurry.

[0114] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a first end cap 6. The first end cap 6 is disposed above the tank body 11, thereby effectively sealing the tank body 11.

[0115] Preferably, at least one first injection element 2 is provided on the radially inner side of the first end cap 6. This allows the catalytic cracking slurry to smoothly enter the first chamber 111 of the tank body 11 through the first injection element 2 on the first end cap 6.

[0116] Preferably, at least one second injection element 3 is provided on the radially outer side of the first end cap 6. This allows the catalytic cracking slurry to smoothly enter the second chamber 112 of the tank body 11 through the second injection element 3 on the first end cap 6.

[0117] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a heating chamber 71. The heating chamber 71 is fitted outside the tank body 11 and can contain heat transfer oil, thereby providing temperature protection for the catalytic cracking slurry in the first chamber 111 of the tank body 11.

[0118] In one embodiment, such as Figure 1As shown, several heating rods 711 are also provided in the heating chamber 71. The heating rods 711 are all equidistantly arranged in the heating chamber 71 along the axial direction. In this way, the heat transfer oil in the heating chamber 71 can be heated more fully and faster, thereby providing effective temperature protection for the catalytic cracking slurry in the first chamber 111 of the tank 11.

[0119] Preferably, a plurality of heating rods 711 are radially mounted on the inner circumferential surface of the heating chamber 71. In this way, the heating rods 711 can rapidly release heat around the heat transfer oil, thereby promoting the rapid dispersion of heat throughout the entire heating chamber 71. This allows the electrostatic separation device 100 for catalytic cracking slurry to quickly enter the working state and begin electrostatic separation of the catalytic cracking slurry, further improving working efficiency.

[0120] Preferably, the heating temperature of the heating rod 711 is 90℃~130℃.

[0121] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a first switching valve 72. The first switching valve 72 is located at the bottom of the heating chamber 71, so that the heat transfer oil in the heating chamber 71 can be smoothly discharged after the electrostatic separation is completed.

[0122] Figure 4 This is a schematic diagram of the second end cap 9 in the electrostatic separation device 100 for catalytic cracking slurry according to the present invention.

[0123] According to the present invention, such as Figure 1 and 4 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a second end cap 9. The second end cap 9 is configured to seal the heating chamber 71, thereby ensuring that the heat from the heat transfer oil in the heating chamber 71 can be fully applied to the catalytic cracking slurry to reduce the viscosity of the catalytic cracking slurry through high temperature.

[0124] In one embodiment, such as Figure 4 As shown, the second end cap 9 is composed of two partially annular cover plates 91 joined together. This allows for quick assembly when the second end cap 9 is installed on the heating chamber 71, further improving the efficiency of installation and disassembly.

[0125] Compared with the prior art, the electrostatic separation device 100 for catalytic cracking slurry of the present invention has a dual viscosity reduction effect on catalytic cracking slurry.

[0126] Firstly, the CO2 produced after gas separation of the mixed gas can dissolve in the catalytic cracking slurry, thereby causing the catalytic cracking slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing the viscosity of the catalytic cracking slurry. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0127] Secondly, the heat transfer oil in the heating chamber 71 is heated by the heat transfer rod 711, thereby transferring the high temperature of the heat transfer oil to the catalytic cracking slurry in the first chamber 111 of the tank 11. This reduces the viscosity of the catalytic cracking slurry at high temperature and prevents the catalytic cracking slurry from solidifying, thus enabling more thorough removal of catalyst particles from the catalytic cracking slurry.

[0128] It is easy to understand that by reducing the viscosity of the catalytic cracking slurry, the catalyst particles in the catalytic cracking slurry can be more easily adsorbed by the packing 101, thereby improving the efficiency of electrostatic separation of the electrostatic separation device 100 used for the catalytic cracking slurry.

[0129] According to the present invention, such as Figure 1 As shown, the electrostatic separation device 100 for catalytic cracking slurry also includes a second switching valve 8. The second switching valve 8 is located below the screen plate 5 and communicates with the first chamber 111 of the tank body 11, so that the catalytic cracking slurry in the first chamber 111 of the tank body 11 can be smoothly discharged after electrostatic separation, thereby facilitating subsequent production.

[0130] According to a second aspect of the present invention, a method for electrostatically separating catalytic cracking slurry using an electrostatic separation device 100 for catalytic cracking slurry as described above is provided, comprising the following steps:

[0131] First, the power supply unit 13 is energized to create an electric field in the contact area of ​​the packing 101. Then, catalytic cracking slurry is injected into the first chamber 111 of the tank 11 through the first injection unit 2.

[0132] Then, the mixed gas is injected into the second chamber 112 of the tank 11 through the second injection device 3, and the mixed gas is transported to the first chamber 111 through the channel 401 on the guide 4, so that the mixed gas comes into contact with the packing 101 and further expands the electric field range, thereby promoting the electrostatic separation of catalytic cracking slurry in the first chamber 111.

[0133] The following is a detailed explanation of the steps described above:

[0134] First, close the first switching valve 72 and the second switching valve 8.

[0135] Then, several packing materials 101 are placed into the first chamber 111 of the tank 11 until the first chamber 111 is filled.

[0136] Then, the first end cap 6 is placed over the tank body 11, thereby closing the first chamber 111 and the second chamber 112 of the tank body 11.

[0137] Then, the power supply unit 13 is inserted into the first chamber 111 of the tank 11 and energized to create an electric field in the contact area of ​​the packing 101.

[0138] Next, heat transfer oil is injected into the heating chamber 71, and the heating rod 711 is energized to heat the heat transfer oil. The second end cap 9 is then placed over the heating chamber 71 to seal it, ensuring that the heat from the heat transfer oil in the heating chamber 71 can be fully released towards the tank 11.

[0139] Subsequently, catalytic cracking slurry is injected into the first chamber 111 of the tank 11 through the first injection device 2.

[0140] Subsequently, the mixed gas is injected into the second chamber 112 of the tank 11 through the second injection component 3, and the mixed gas is dispersed into the first chamber 111 of the tank 11 through the channels 401 on the first guide portion 41 and the second guide portion 42 respectively.

[0141] Specifically, the mixed gas dispersed in the first chamber 111 of the tank 11 can come into contact with the packing 101 and further expand the electric field range, thereby promoting electrostatic separation of the catalytic cracking slurry in the first chamber 111.

[0142] After the electrostatic separation is completed, the second switch valve 8 is opened, and the catalytic cracking slurry after electrostatic separation flows to the outside after being filtered through the sieve plate 5 for subsequent production.

[0143] Finally, open the first switch valve 72 to release the heat transfer oil for subsequent use.

[0144] Compared with the prior art, the present invention has the following advantages:

[0145] Firstly, this invention uses filler balls with high surface roughness. Specifically, by having the mixed gas adhere to the surface of the filler 101, this invention increases the range of the high-voltage electric field formed by the filler 101 under the action of the power supply 13, which can adsorb catalyst particles in the catalytic cracking slurry. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry, ensuring that higher quality raw materials can be obtained after electrostatic separation in the electrostatic separation device 100 for the catalytic cracking slurry, thus facilitating subsequent production.

[0146] Furthermore, due to their high surface roughness, the filling spheres have distinct depressions and protrusions.

[0147] The recessed portion of the packing ball provides ample space for the mixed gas to adhere, thereby increasing the residence time of the mixed gas. According to the above description, after the mixed gas adheres to the surface of the packing 101, it significantly increases the range of the high-voltage electric field formed by the packing 101 that can adsorb catalyst particles in the catalytic cracking slurry, thereby improving the efficiency of removing catalyst particles from the catalytic cracking slurry.

[0148] The protrusions of the packing balls can, on the one hand, facilitate the ionization of the mixed gas, thereby separating CO2 to effectively disrupt the colloidal system of the catalytic cracking slurry and further reduce its viscosity. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry. On the other hand, the protrusions of the packing balls can facilitate partial discharge, resulting in a large number of opposite polarity charges being generated on the gas side. These opposite polarity charges can be deposited on the recesses of the packing balls under the influence of the electric field, thereby expanding the range of the high-voltage electric field.

[0149] Therefore, the contact area of ​​the packing ball and the surface area outside the contact area of ​​the packing ball in this invention are both high voltage electric field areas, which can effectively improve the adsorption effect of the packing ball on the catalyst particles in the catalytic cracking slurry, thereby obtaining high-quality raw materials after electrostatic separation, which is further beneficial to subsequent production work.

[0150] Secondly, this invention fills the first chamber 111 of the tank 11 with a mixed gas (C4F7N / CO2). This invention improves the electrostatic separation environment of the electrostatic separation device 100 used for catalytic cracking slurry by using the mixed gas. This will be described in detail below in conjunction with the above content.

[0151] First, because C4F7N / CO2 has good insulation properties, it can ensure that the first chamber 111 of the tank 11 in the electrostatic separation device 100 for catalytic cracking slurry is always in a low current state, thereby fully guaranteeing the safety of the electrostatic separation process of catalytic cracking slurry in the electrostatic separation device 100 for catalytic cracking slurry.

[0152] Secondly, the CO2 separated from C4F7N / CO2 gas can dissolve in the catalytic cracking slurry, thereby causing the catalytic cracking slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing the viscosity of the catalytic cracking slurry. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0153] Furthermore, C4F7N / CO2 is an environmentally friendly gas. Therefore, the electrostatic separation device 100 used for catalytic cracking slurry will not pollute the surrounding environment during operation, thus giving the electrostatic separation device 100 for catalytic cracking slurry good environmental performance.

[0154] It is easy to understand that filling the first chamber 111 of the tank 11 with a mixed gas (C4F7N / CO2) ensures that the first chamber 111 is always in a low current state, thereby fully guaranteeing the safety and stability of the electrostatic separation process. Furthermore, this method also allows for the use of higher DC voltages in the electrostatic separation process of this invention.

[0155] Thirdly, the present invention can achieve a dual viscosity reduction effect on catalytic cracking slurry, including the following:

[0156] The first measure to reduce the viscosity of catalytic cracking slurry: CO2 after gas separation of the mixed gas can dissolve in the catalytic cracking slurry, thereby causing the slurry to expand in volume and decrease in density. It can also extract some of the asphaltenes and gums, thus effectively destroying the colloidal system of the catalytic cracking slurry and further reducing its viscosity. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0157] The second measure to reduce the viscosity of the catalytic cracking slurry is to heat the heat transfer oil in the heating chamber 71 by using the heat transfer rod 711. This heat transfer oil can be transferred to the first chamber 111 of the tank 11, thereby reducing the viscosity of the catalytic cracking slurry at high temperature and preventing solidification. This allows for more thorough removal of catalyst particles from the catalytic cracking slurry.

[0158] It is easy to understand that by reducing the viscosity of the catalytic cracking slurry, the catalyst particles in the catalytic cracking slurry can be more easily adsorbed by the packing 101, thereby improving the efficiency of electrostatic separation of the electrostatic separation device 100 used for the catalytic cracking slurry.

[0159] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0160] In this invention, unless otherwise explicitly specified and limited, the terms "installation", "connection", "linking", "fixing", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components.

[0161] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0162] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An electrostatic separation device for catalytic cracking slurry, comprising: The separation mechanism includes a tank (11), an annular baffle (12) disposed inside the tank (11) and dividing the tank (11) into a first chamber (111) and a second chamber (112), and a power supply unit (13) disposed in the first chamber (111). A guide (4) is fitted over the power supply component (13) and communicates with the second chamber (112). The first injection unit (2) is used to inject catalytic cracking slurry into the first chamber (111). The second injection device (3) for injecting the mixed gas into the second chamber (112), and Packing material (101) that can be inserted into the first chamber (111). The contact area of ​​the packing (101) can form an electric field under the action of the power supply (13), and can further expand the electric field range under the action of the mixed gas, thereby promoting the electrostatic separation of the catalytic cracking slurry in the first chamber (111). The packing material (101) comprises several glass packing balls, with several protrusions and depressions distributed on the surface of the packing balls. The mixed gas can be separated under the action of the protrusions to break the colloidal system of the catalytic cracking slurry, and the mixed gas can adhere to the depressions to expand the electric field range of the packing material (101). The mixed gas comprises C4F7N and an inert gas, wherein the C4F7N accounts for 5-20% of the mixed gas. The power supply component (13) is an electrode post, and several guides are equidistantly arranged along the axial direction of the electrode post. (4) The guide (4) includes a first guide portion (41) configured in an annular shape and a plurality of second guide portions (42) configured in a rod shape extending radially outward from the first guide portion (41), wherein the second guide portions (42) extend through the annular baffle (12) and communicate with the second chamber (112), and a plurality of equally spaced channels (401) are provided on both the first guide portion (41) and the second guide portion (42), and a semi-permeable membrane that allows only the mixed gas to pass through is provided on each of the channels (401).

2. The electrostatic separation device for catalytic cracking slurry according to claim 1, characterized in that, The spherical roughness of the filler (101) is in the range of N9 to N12.

3. The electrostatic separation device for catalytic cracking slurry according to claim 2, characterized in that, The mixed gas is C4F7N / CO2.

4. The electrostatic separation device for catalytic cracking slurry according to any one of claims 1 to 3, characterized in that, The electrostatic separation device further includes a sieve plate (5) disposed in the first chamber (111) and below the power supply component (13), wherein the diameter of the sieve hole (501) of the sieve plate (5) and the inner diameter of the first guide portion (41) are both smaller than the diameter of the packing (101).

5. The electrostatic separation device for catalytic cracking slurry according to any one of claims 1 to 3, characterized in that, The electrostatic separation device further includes a first end cap (6) disposed above the tank (11), at least one first injection element (2) is disposed on the radial inner side of the first end cap (6), and at least one second injection element (3) is disposed on the radial outer side of the first end cap (6).

6. The electrostatic separation device for catalytic cracking slurry according to any one of claims 1 to 3, characterized in that, The electrostatic separation device further includes a heating chamber (71) sleeved outside the tank (11) for containing heat transfer oil, a first switching valve (72) disposed at the bottom of the heating chamber (71), and a plurality of heating rods (711) disposed longitudinally and equidistantly within the heating chamber (71), wherein the heating rods (711) are all radially mounted on the inner circumferential surface of the heating chamber (71).

7. The electrostatic separation device for catalytic cracking slurry according to claim 4, characterized in that, The electrostatic separation device also includes a second switching valve (8) disposed below the sieve plate (5), and the second switching valve (8) is connected to the first chamber (111).

8. The electrostatic separation device for catalytic cracking slurry according to claim 6, characterized in that, The electrostatic separation device also includes a second end cap (9) for sealing the heating chamber (71), the second end cap (9) being formed by splicing two cover plates (91) configured in a partially annular shape.

9. A method for electrostatically separating catalytic cracking slurry using the electrostatic separation device according to any one of claims 1 to 8, comprising the following steps: S1. Powering the power supply unit (13) to create an electric field in the contact area of ​​the packing (101), and injecting catalytic cracking slurry into the first chamber (111) of the tank (11) through the first injection unit (2). S2. The mixed gas is injected into the second chamber (112) of the tank (11) through the second injection member (3), and the mixed gas is transported to the first chamber (111) through the channel (401) on the guide member (4) so ​​that the mixed gas comes into contact with the packing (101) and further expands the electric field range, thereby promoting the electrostatic separation of the catalytic cracking slurry in the first chamber (111).

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