Method and process equipment for intercepting and removing catalyst fine powder from reaction gas system

Abstract

The present invention provides a method and process equipment for intercepting and removing catalyst fine powder from a reaction gas system, and relates to the technical field of methanol to olefins, methanol to propylene, and methanol to aromatics equipment. The relevant process equipment includes a reactor, a three-stage cyclone separator, a four-stage cyclone separator, and a first pulse high-temperature dust collector; the method for intercepting and removing catalyst fine powder from a reaction gas system includes catalyst particle recycling, preliminary removal of catalyst fine powder, interception and removal of catalyst fine powder from three to four cyclones, and interception and removal of catalyst fine powder from four cyclones outputting reaction gas. Using the relevant process equipment according to the above method has many advantages, such as reducing half of the catalyst fine powder entering the quenching water system, reducing the blockage of various cold exchange equipment in the water system due to catalyst fine powder, extending the equipment life, reducing the cleaning frequency of various equipment, improving work efficiency, stabilizing the pressure difference of the equipment, reducing energy consumption, reducing safety risks, and extending the maintenance period.

Description

Technical Field

[0001] The present invention relates to the technical field of methanol to olefins, methanol to propylene and methanol to aromatics equipment, and in particular to a method and process equipment for intercepting and removing catalyst fine powder from a reaction gas system. Background Art

[0002] The feed of methanol to olefins unit is methanol, which reacts with catalyst in a closed reactor. The reaction conditions are controlled to reduce the occurrence of side reactions, and an ideal olefin mixture is obtained, which is then sent to subsequent units for processing. The existing methanol to olefins processes mainly include: DMTO, SMTO, MTO and other technologies, among which DMTO technology has undergone multiple iterations and updates.

[0003] The feed of methanol to propylene unit is methanol, which reacts with the catalyst in a closed reactor. The reaction conditions are controlled to reduce the occurrence of side reactions, and an ideal propylene mixture is obtained, which is then sent to subsequent units for processing. The existing methanol to propylene processes mainly include: DMTP technology.

[0004] The feed of methanol to aromatics unit is methanol, which reacts with the catalyst in a closed reactor. The reaction conditions are controlled to reduce the occurrence of side reactions, and an ideal aromatics mixture is obtained, which is then sent to subsequent units for processing. The existing methanol to aromatics processes mainly include: DMTA technology.

[0005] The above-mentioned methanol to olefins, propylene and aromatics processes use multi-stage cyclone separators to filter out catalyst fine powder in the high-temperature reaction gas. The catalyst content in the reaction gas discharged from the last stage cyclone separator is still relatively high. If it is directly introduced into the quenching water system, it is more likely to cause wear and blockage of the components in the quenching water system, reduce its working efficiency, shorten its operating cycle, increase the cleaning frequency of the components in the quenching water system, increase the energy consumption of the device, cause the equipment to lose pressure difference stability, and increase safety risks. Summary of the invention

[0006] The purpose of the present invention is to provide a method and process equipment for intercepting and removing catalyst fine powder from a reaction gas system, which has the advantage of greatly reducing the catalyst content in the reaction gas entering the quenching water system in this process, and solves the technical problem that the catalyst content in the reaction gas discharged from the cyclone separator is still relatively high, and if it is directly introduced into the quenching water system, it is more likely to cause wear and blockage of components in the quenching water system.

[0007] The present invention provides related process equipment for intercepting and removing catalyst fine powder from a reaction gas system, including a reactor, a high-temperature reaction gas output end of which is fixedly connected to a three-stage cyclone separator through a pipeline;

[0008] The discharge valve of the small amount of gas and catalyst fine powder at the bottom of the three-stage cyclone separator is fixedly connected to the four-stage cyclone separator through a pipeline, and the high-temperature reaction gas output end of the three-stage cyclone separator is fixedly connected to the heat exchanger and the quench tower in sequence through a pipeline;

[0009] The high-temperature reaction gas output end of the four-stage cyclone separator is fixedly connected to the first pulse high-temperature dust collector through a pipeline, and the high-temperature reaction gas output end of the first pulse high-temperature dust collector is fixedly connected to the quenching tower through a pipeline;

[0010] The four-stage cyclone separator and the discharge valve at the lower part of the first pulse high-temperature dust collector discharge the catalyst fine powder.

[0011] As a further optimization scheme, in order to filter out catalyst fine powder in the high-temperature reaction gas using a high-temperature resistant composite filter element, the first pulse high-temperature dust collector includes:

[0012] A pulse high temperature dust collector, which has a mounting frame therein;

[0013] The high temperature resistant composite filter element is tubular with a sealed bottom end, and a flange is provided at the upper end of the outer wall of the high temperature resistant composite filter element;

[0014] The high temperature resistant composite filter element is inserted into the mounting opening of the mounting frame, and a sealing ring is arranged between the flange of the high temperature resistant composite filter element and the upper surface of the mounting frame.

[0015] As a further optimization solution, in order to better apply to the filtration of catalyst fine powder in high-temperature reaction gas, the high-temperature resistant composite filter element is specifically a high-permeability inorganic aluminum silicate composite material filter element.

[0016] As a further optimization plan, in order to further filter out the catalyst fine powder in the high-temperature reaction gas discharged from the three-stage cyclone separator and extend the operation cycle of the subsequent heat exchanger and quench tower, it also includes:

[0017] A second pulse high temperature dust collector, which has the same structure as the first pulse high temperature dust collector;

[0018] The gas input and upper gas output of the second pulse high-temperature dust collector are fixedly connected to a position between the high-temperature reaction gas output of the three-stage cyclone separator and the input of the heat exchanger;

[0019] The discharge valve for a small amount of gas and catalyst fine powder at the bottom of the second pulse high-temperature dust collector is fixedly connected to the input end of the four-stage cyclone separator through a pipeline.

[0020] As a further optimization scheme, in order to buffer the intake of the high-temperature reaction gas, so that the catalyst fine powder in the high-temperature reaction gas is precipitated, the content of the catalyst fine powder in most of the overflowed high-temperature reaction gas is reduced, and the high-temperature reaction gas and the catalyst fine powder are roughly separated, an intake buffer structure is also included, which includes:

[0021] A tank body, the middle part of which is fixedly connected to the pipeline connecting the third-stage cyclone separator and the reactor;

[0022] An overflow flow regulating valve is installed on the pipeline between the tank body and the three-stage cyclone separator;

[0023] A sediment discharge pipe is fixedly connected between the lower end of the tank body and the three-stage cyclone separator, and a sediment flow regulating valve is installed on the sediment discharge pipe.

[0024] As a further optimization scheme, in order to filter out the catalyst particles in the high-temperature reaction gas and recycle the catalyst particles, a catalyst particle filter and a Roots blower are also included;

[0025] The gas input and filtered gas output ends of the catalyst particle filter are fixedly connected to a position between the high-temperature reaction gas output end of the reactor and the input end of the three-stage cyclone separator;

[0026] The position between the discharge valve at the bottom of the catalyst particle filter and the lower end of the reactor is fixedly connected via a Roots blower.

[0027] As a further optimization scheme, in order to filter out the catalyst particles in the high-temperature reaction gas and recycle the catalyst particles while avoiding clogging of the arc-shaped high-temperature resistant composite filter plate, the catalyst particle filter includes:

[0028] A shell body, the upper end of which is buckled with an upper cover;

[0029] The shell is fixedly connected with a conical cover on one side away from the reactor, and the smaller end of the conical cover is fixedly connected with the input end of the third-stage cyclone separator through a pipeline;

[0030] An arc-shaped high-temperature resistant composite filter plate is inserted into the inner wall of the shell away from the reactor, and the upper end of the arc-shaped high-temperature resistant composite filter plate is glued and fixed to the bottom surface of the upper cover;

[0031] The front and rear side walls of the inner cavity of the shell are rotatably equipped with impellers, and the outer end of the impeller is slidably fitted with the arc-shaped concave inner wall of the arc-shaped high-temperature resistant composite filter plate after rotation;

[0032] The bottom surface of the shell is fixedly connected to a hopper, and the lower end of the hopper is fixedly connected to a pneumatic regulating valve discharge pipe;

[0033] The pneumatic regulating valve discharge pipe is fixedly connected to the input end of the Roots blower;

[0034] The aperture of the arc-shaped high-temperature resistant composite filter plate is the maximum particle size of the catalyst fine powder to be removed.

[0035] As a further optimization scheme, in order to better drive the impeller to rotate by wind, disperse the high-temperature reaction gas, and scrape off the catalyst particles on the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate, the impeller includes:

[0036] A round rod, which is rotatably mounted in the middle of the front and rear side walls of the inner cavity of the shell;

[0037] The outer wall of the round rod is fixedly sleeved with a sleeve;

[0038] The outer wall of the sleeve is evenly and circumferentially fixed with fan blades, and the fan blades are distributed along the length direction of the outer wall of the sleeve;

[0039] The number of the fan blades is six;

[0040] The outer end of the fan blade is slidably fitted with the inner wall of the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate.

[0041] As a further optimization solution, in order to enhance the turbulent flow dispersion effect on the reaction gas during the rotation of the fan, first turbulent flow holes are evenly opened at the outer end edge of the fan blade.

[0042] The method for intercepting and removing catalyst fine powder from a reaction gas system adopts the above-mentioned related process equipment for intercepting and removing catalyst fine powder from a reaction gas system, and comprises the following steps:

[0043] S1 catalyst particle recycling, the high temperature reaction gas output from the reactor is passed into the catalyst particle filter, and the catalyst particle filter transports the separated catalyst particles back to the reactor through the Roots blower;

[0044] Removal of catalyst fine powder from S2 high-temperature reaction gas: the high-temperature reaction gas from which catalyst particles are removed is output from the catalyst particle filter and passed into a three-stage cyclone separator. The three-stage cyclone separator passes the high-temperature reaction gas from which catalyst fine powder is separated into a heat exchanger and a quenching tower. The high-temperature reaction gas from which catalyst fine powder is separated is first subjected to heat exchange and cooling and then rapidly cooled and collected. A small amount of gas and catalyst fine powder are discharged from the lower valve of the three-stage cyclone separator and enter the four-stage cyclone separator.

[0045] S3: The catalyst fine powder in the residual reaction gas is removed by separating a small amount of gas and catalyst fine powder discharged from the lower valve of the third-stage cyclone separator through a fourth-stage cyclone separator, and the removed catalyst fine powder is discharged and collected. The reaction gas output from the fourth-stage cyclone separator is introduced into the first pulse high-temperature dust collector;

[0046] The catalyst fine powder in the reaction gas output by the S4 four-stage cyclone separator is removed by filtering the reaction gas output by the four-stage cyclone separator through the first pulse high-temperature dust collector. The filtered catalyst fine powder is discharged from the lower valve of the first pulse high-temperature dust collector, and the reaction gas with the catalyst fine powder removed is passed into the quenching tower.

[0047] The present invention provides a method and process equipment for intercepting and removing catalyst fine powder from a reaction gas system through improvement. Compared with the prior art, the present invention has the following improvements and advantages:

[0048] The device reactor is integrated with a primary cyclone separator and a secondary cyclone separator. After the two-stage separation, the high-temperature reaction gas and catalyst particles are separated through a catalyst particle filter, and the filtered catalyst particles are guided back to the reactor through a Roots blower. After the catalyst particles are filtered out by the catalyst particle filter, the high-temperature reaction gas and catalyst fine powder are separated through a third-stage cyclone separator and a fourth-stage cyclone separator. The reaction gas output end at the upper end of the fourth-stage cyclone separator is connected to the first pulse high-temperature dust collector as a gas-solid separation device, which greatly reduces the catalyst content in the reaction gas entering the quenching water system in this process, reduces the probability of wear and blockage of components in the quenching water system, improves work efficiency, extends its operating cycle, reduces the cleaning frequency of components in the quenching water system, reduces the energy consumption of the device, makes the pressure difference of the equipment stable, and reduces safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0050] Figure 1 It is a structural schematic diagram of the first embodiment of the present invention;

[0051] Figure 2 It is a schematic diagram of the structure of the first pulse high temperature dust collector of the present invention;

[0052] Figure 3 It is a schematic structural diagram of a second embodiment of the present invention;

[0053] Figure 4 It is a schematic structural diagram of a third embodiment of the present invention;

[0054] Figure 5 It is a schematic structural diagram of a fourth embodiment of the present invention;

[0055] Figure 6 It is a schematic structural diagram of the catalyst particle filter of the present invention;

[0056] Figure 7 is a schematic cross-sectional view of the internal structure of the catalyst particle filter of the present invention;

[0057] Figure 8 It is a schematic structural diagram of a fifth embodiment of the present invention;

[0058] Fig. 9 It is a schematic structural diagram of a sixth embodiment of the present invention;

[0059] Fig.10 is a schematic structural diagram of a seventh embodiment of the present invention;

[0060] Fig.11 is a schematic structural diagram of an eighth embodiment of the present invention;

[0061] Fig.12 It is a structural schematic diagram of a first embodiment of an impeller of the present invention;

[0062] Fig.13 It is a structural schematic diagram of a second embodiment of an impeller of the present invention;

[0063] Fig.14 It is a structural schematic diagram of a third embodiment of an impeller of the present invention;

[0064] Fig.15 For the present invention Figure 7 The enlarged structural diagram at A in the middle;

[0065] Fig.16 This is a schematic diagram of the structure of the present invention after removing the three-stage cyclone separator.

[0066] Description of reference numerals:

[0067] 1-reactor, 2-waste storage tank, 3-catalyst particle filter, 31-housing, 32-upper cover, 33-conical cover, 34-arc-shaped high temperature resistant composite filter plate, 35-impeller, 351-round rod, 352-sleeve, 353-fan blade, 36-hopper, 37-pneumatic regulating valve discharge pipe, 4-Roots blower, 5-three-stage cyclone separator, 6-second pulse high temperature dust collector, 7-fourth-stage cyclone separator, 8-first pulse high temperature dust collector, 81-pulse high temperature dust collector Dust collector, 82-high temperature resistant composite filter element, 83-sealing ring, 9-clamping structure, 91-groove, 92-arc-shaped slot, 93-elastic metal plate, 94-arc-shaped block, 10-first disturbing flow hole, 11-V-shaped groove, 12-wavy groove, 13-second disturbing flow hole, 14-air intake buffer structure, 141-tank body, 142-sediment flow regulating valve, 143-overflow flow regulating valve, 144-sediment discharge pipe, 15-quenching tower, 16-heat exchanger. DETAILED DESCRIPTION

[0068] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0069] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0070] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] See also Figure 1-16 , the present invention provides a technical solution:

[0072] like Figure 1 As shown, the first embodiment:

[0073] In the first case of the first embodiment, the relevant process equipment for intercepting and removing catalyst fine powder from the reaction gas system includes a reactor 1, whose high-temperature reaction gas output end is fixedly connected to a three-stage cyclone separator 5 through a pipeline, and a first-stage cyclone separator and a second-stage cyclone separator are integrated in the reactor 1. After the two-stage separation, the high-temperature reaction gas and the catalyst particles are separated by a catalyst particle filter, and the filtered catalyst particles are guided back to the reactor by a Roots blower. The high-temperature reaction gas after the catalyst particles are filtered out by the catalyst particle filter first enters the three-stage cyclone separator 5, and the three-stage cyclone separator 5 separates the catalyst fine powder in the high-temperature reaction gas;

[0074] The discharge valve of the small amount of gas and catalyst fine powder at the bottom of the third-stage cyclone separator 5 is fixedly connected to the fourth-stage cyclone separator 7 through a pipeline, and the high-temperature reaction gas output end of the third-stage cyclone separator 5 is fixedly connected to the heat exchanger 16 and the quench tower 15 through a pipeline in sequence, and is collected after passing through the heat exchanger 16 and the quench tower 15;

[0075] The high-temperature reaction gas output end of the four-stage cyclone separator 7 is fixedly connected to the first pulse high-temperature dust collector 8 through a pipeline, and the high-temperature reaction gas output end of the first pulse high-temperature dust collector 8 is fixedly connected to the quenching tower 15 through a pipeline. The first pulse high-temperature dust collector 8 filters the catalyst fine powder in the remaining reaction gas, and the remaining reaction gas after the catalyst fine powder is filtered out is discharged into the quenching tower 15;

[0076] The catalyst fine powder is discharged through the discharge valves at the lower part of the fourth-stage cyclone separator 7 and the first pulse high-temperature dust collector 8 .

[0077] In the second case of the first embodiment, the reactor 1 is a reactor in the DMTO, SMTO, MTO and other technologies, and the DMTO is provided with a three-stage cyclone separator 5 and a four-stage cyclone separator 7, which is the same as the first case of the first embodiment; the SMTO and MTO are only provided with a three-stage cyclone separator 5, and the high-temperature reaction gas output end of the three-stage cyclone separator 5 is fixedly connected to the first pulse high-temperature dust collector 8 through a pipeline, and the high-temperature reaction gas output end of the first pulse high-temperature dust collector 8 is connected to the heat exchanger 16 and the quenching tower 15 in sequence through a pipeline;

[0078] The reactor 1 can also be replaced by corresponding equipment in the DMTP or DMTA technology, in which a three-stage cyclone separator 5 and a four-stage cyclone separator 7 are provided, which is the same as the first case of the first embodiment.

[0079] like Fig.16As shown, in the third case of the first embodiment, the three-stage cyclone separator 5 is removed, and the output end of the high-temperature reaction gas output by the reactor 1 is fixedly connected to the first pulse high-temperature dust collector 8 through a pipeline, and the output end of the high-temperature reaction gas of the first pulse high-temperature dust collector 8 is connected to the heat exchanger 16 and the quenching tower 15 in sequence through a pipeline. After removing the three-stage cyclone separator 5, the device can still be used normally, and the catalyst fine powder is basically intercepted.

[0080] like Figure 2 As shown, the first pulse high temperature dust collector 8 includes:

[0081] Pulse high temperature dust collector 81, which has a mounting frame;

[0082] The high temperature resistant composite filter element 82 is tubular with a sealed bottom end, and a flange is provided at the upper end of the outer wall of the high temperature resistant composite filter element 82;

[0083] The high temperature resistant composite filter element 82 is inserted into the mounting opening of the mounting frame, and a sealing ring 83 is provided between the flange of the high temperature resistant composite filter element 82 and the upper surface of the mounting frame.

[0084] The pulse high-temperature dust collector 81 consists of a dust collector, a fine powder collection tank, a set of gas buffer pipes, supporting valves and automatic control systems. The fine powder collection tank is mainly composed of four parts: A. The filtering part is mainly composed of the filter housing, the high-temperature resistant composite filter element 82, etc. This part is the core of the fine powder collection tank and mainly plays the role of gas-solid separation; B. The backwashing part is mainly composed of a temperature transmitter, a pressure transmitter, a pulse valve and a connected backwashing gas pipeline, etc. This part mainly plays the role of regenerating the high-temperature resistant composite filter element 82; C. The unloading and packaging part is mainly composed of a unloading valve, a collection tank, etc., which stores a certain amount of waste catalyst and is regularly unloaded and packaged manually; D. The control part is controlled by PLC.

[0085] The high temperature resistant composite filter element 82 is specifically a high permeability inorganic aluminum silicate composite material filter element. The high temperature resistant composite filter element 82 has the characteristics of high temperature resistance, non-combustion, high filtration efficiency, resistance to chemical corrosion such as acid and alkali, high permeability, and resistance to heat shock. When dismantling and replacing, it only needs to be pulled out from the installation port of the mounting frame, which is convenient for maintenance. The setting of the sealing ring 83 enhances the airtightness of the installation of the high temperature resistant composite filter element 82.

[0086] like Figure 3 As shown, the second embodiment:

[0087] The difference between the first embodiment and the first embodiment is that it further comprises:

[0088] A second pulse high temperature dust collector 6, which has the same structure as the first pulse high temperature dust collector 8;

[0089] The gas input and upper gas output of the second pulse high-temperature dust collector 6 are fixedly connected to the position between the high-temperature reaction gas output of the three-stage cyclone separator 5 and the input of the heat exchanger 16;

[0090] The discharge valve of a small amount of gas and catalyst fine powder at the bottom of the second pulse high-temperature dust collector 6 is fixedly connected to the input end of the fourth-stage cyclone separator 7 through a pipeline. The second pulse high-temperature dust collector 6 further performs gas-solid separation on the high-temperature reaction gas discharged from the third-stage cyclone separator 5, filters out the catalyst fine powder therein, and further extends the operation cycle of the subsequent heat exchanger 16 and the quenching tower 15.

[0091] like Figure 4 As shown, the third embodiment:

[0092] The difference between the first embodiment and the first embodiment is that it further comprises an air intake buffer structure 14, which comprises:

[0093] The tank body 141, the middle part of which is fixedly connected to the pipeline connecting the third-stage cyclone separator 5 and the reactor 1;

[0094] An overflow flow regulating valve 143 is installed on the pipeline between the tank 141 and the third-stage cyclone separator 5;

[0095] A sediment discharge pipe 144 is fixedly connected between the lower end of the tank body 141 and the three-stage cyclone separator 5, and a sediment flow regulating valve 142 is installed on the sediment discharge pipe 144. The high-temperature reaction gas discharged from the reactor 1 first slowly enters the tank body 141, and the overflow flow regulating valve 143 is opened. The catalyst fine powder in the high-temperature reaction gas precipitates downward, and the high-temperature reaction gas containing less catalyst fine powder is first discharged from the overflow flow regulating valve 143 into the three-stage cyclone separator 5, and the high-temperature reaction gas containing more catalyst fine powder is then discharged from the sediment flow regulating valve 142 into the three-stage cyclone separator 5, thereby achieving a rough separation of the high-temperature reaction gas and the catalyst fine powder. After the rough separation, the three-stage cyclone separator 5 can perform better gas-solid separation, thereby reducing the content of catalyst fine powder in the high-temperature reaction gas discharged into the quenching tower 15.

[0096] like Figure 5 As shown, the fourth embodiment:

[0097] The difference between the embodiment 1 and the first embodiment is that it further comprises a catalyst particle filter 3 and a Roots blower 4;

[0098] The gas input and filtered gas output of the catalyst particle filter 3 are fixedly connected to the position between the high-temperature reaction gas output of the reactor 1 and the input of the three-stage cyclone separator 5;

[0099] The discharge valve at the bottom of the catalyst particle filter 3 is fixedly connected to the lower end of the reactor 1 through a Roots blower 4. The catalyst particles in the high-temperature reaction gas discharged from the reactor 1 are filtered out by the catalyst particle filter 3, and the catalyst fine powder and the reaction gas are discharged from the catalyst particle filter 3 into the three-stage cyclone separator 5. These catalyst particles are not worn out to become catalyst fine powder, and can be recycled and reused, and are guided back to the reactor 1 through the Roots blower 4 to supplement the catalyst, thereby reducing production costs.

[0100] like Figure 6 , 7 As shown, in some embodiments, in order to filter out the catalyst particles in the high-temperature reaction gas and recycle the catalyst particles, while avoiding clogging of the arc-shaped high-temperature resistant composite filter plate 34, the catalyst particle filter 3 includes:

[0101] The housing 31 has an upper cover 32 fastened to its upper end;

[0102] The shell 31 is fixedly connected to a conical cover 33 on the side away from the reactor 1, and the smaller end of the conical cover 33 is fixedly connected to the input end of the third-stage cyclone separator 5 through a pipeline;

[0103] An arc-shaped high-temperature-resistant composite filter plate 34 is inserted into the inner wall of the shell 31 away from the reactor 1, and the upper end of the arc-shaped high-temperature-resistant composite filter plate 34 is glued and fixed to the bottom surface of the upper cover 32;

[0104] The front and rear side walls of the inner cavity of the housing 31 are rotatably equipped with an impeller 35, and the outer end of the impeller 35 is slidably fitted with the arc-shaped concave inner wall of the arc-shaped high-temperature resistant composite filter plate 34 after rotation;

[0105] The bottom surface of the shell 31 is fixedly connected to a hopper 36, and the lower end of the hopper 36 is fixedly connected to a pneumatic regulating valve discharge pipe 37;

[0106] The pneumatic regulating valve discharge pipe 37 is fixedly connected to the input end of the Roots blower 4;

[0107] The aperture of the arc-shaped high temperature resistant composite filter plate 34 is the maximum particle size of the catalyst fine powder to be removed.

[0108] After the reaction gas enters, it drives the impeller 35 to rotate. The rotating impeller can disperse the reaction gas to prevent the filtered catalyst particles from concentrating in the middle of the arc-shaped high-temperature resistant composite filter plate 34. At the same time, during the rotation of the impeller 35, the outer end slides and fits with the inner wall of the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate 34, which can scrape off the catalyst particles adhering to the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate 34, avoiding the catalyst particles from clogging the mesh holes of the arc-shaped high-temperature resistant composite filter plate 34, causing the exhaust gap to become smaller, and blocking the catalyst fine powder.

[0109] In some embodiments, in order to better drive the impeller 35 to rotate by wind, disperse the high-temperature reaction gas, and scrape off the catalyst particles on the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate 34, the impeller 35 includes:

[0110] The round rod 351 is rotatably mounted in the middle of the front and rear side walls of the inner cavity of the housing 31;

[0111] The outer wall of the round rod 351 is fixedly sleeved with a sleeve 352;

[0112] The outer wall of the sleeve 352 is evenly and circumferentially fixedly equipped with fan blades 353, and the fan blades 353 are distributed along the length direction of the outer wall of the sleeve 352;

[0113] The number of the fan blades 353 is six, and the angle between adjacent fan blades 353 is 60 degrees, so that they can be blown by the reaction gas to rotate around the round rod 351 better;

[0114] The outer end of the fan blade 353 is slidably fitted with the inner wall of the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate 34, and the rotating fan blade 353 scrapes off the catalyst particles adhering to the inner wall of the arc-shaped concave surface of the arc-shaped high-temperature resistant composite filter plate 34;

[0115] First turbulent flow holes 10 are evenly opened at the outer end edge of the fan blade 353 to enhance the turbulent flow dispersion effect on the reaction gas during the rotation of the fan blade 353.

[0116] like Figure 8 As shown, the fifth embodiment:

[0117] The difference between the embodiment 1 and the first embodiment is that a second pulse high temperature dust collector 6 and an air intake buffer structure 14 are added, and the installation method of the second pulse high temperature dust collector 6 and the air intake buffer structure 14 is the same as that of the second embodiment and the third embodiment;

[0118] The second pulse high-temperature dust collector 6 performs further gas-solid separation on the high-temperature reaction gas discharged from the three-stage cyclone separator 5, filters out the catalyst fine powder therein, and further extends the operation cycle of the subsequent heat exchanger 16 and the quenching tower 15; it realizes the coarse separation of the high-temperature reaction gas and the catalyst fine powder, and after the coarse separation, it can be better separated by the three-stage cyclone separator 5, thereby reducing the content of catalyst fine powder in the high-temperature reaction gas discharged into the quenching tower 15.

[0119] like Fig. 9 As shown, the sixth embodiment:

[0120] The difference between the embodiment 1 and the first embodiment is that a second pulse high temperature dust collector 6, a catalyst particle filter 3 and a Roots blower 4 are added, and the installation methods thereof are the same as those of the second embodiment and the fourth embodiment respectively;

[0121] The second pulse high-temperature dust collector 6 performs further gas-solid separation on the high-temperature reaction gas discharged from the three-stage cyclone separator 5, filters out the catalyst fine powder therein, and further extends the operation cycle of the subsequent heat exchanger 16 and the quenching tower 15; the catalyst particles in the high-temperature reaction gas discharged from the reactor 1 are filtered out by the catalyst particle filter 3, and the catalyst fine powder and the reaction gas are discharged into the three-stage cyclone separator 5 through the catalyst particle filter 3. These catalyst particles are not worn out to become catalyst fine powder, and can be recycled and reused, and are guided back to the reactor 1 through the Roots blower 4 to supplement the catalyst, thereby reducing production costs.

[0122] like Fig.10 As shown, the seventh embodiment:

[0123] The difference between the embodiment 1 and the first embodiment is that an air intake buffer structure 14, a catalyst particle filter 3 and a Roots blower 4 are additionally provided, and the installation methods thereof are respectively the same as those of the third embodiment and the fourth embodiment, and the air intake buffer structure 14 is installed on the pipeline between the input end of the catalyst particle filter 3 and the reactor 1;

[0124] The high-temperature reaction gas and the catalyst fine powder are roughly separated. After the rough separation, the three-stage cyclone separator 5 can be used for better gas-solid separation, thereby reducing the content of catalyst fine powder in the high-temperature reaction gas discharged into the quenching tower 15; the catalyst particles in the high-temperature reaction gas discharged from the reactor 1 are filtered out by the catalyst particle filter 3, and the catalyst fine powder and the reaction gas are discharged into the three-stage cyclone separator 5 through the catalyst particle filter 3. These catalyst particles are not worn out to become catalyst fine powder, and can be recycled and reused, and are guided back to the reactor 1 through the Roots blower 4 for catalyst supplement, thereby reducing production costs.

[0125] like Fig.11 As shown, the eighth embodiment:

[0126] The difference between the embodiment 1 and the first embodiment is that an air intake buffer structure 14, a second pulse high temperature dust collector 6 and a catalyst particle filter 3 are additionally provided, and the installation methods thereof are respectively the same as those of the third embodiment, the second embodiment and the fourth embodiment, and the air intake buffer structure 14 is installed on the pipeline between the input end of the catalyst particle filter 3 and the reactor 1;

[0127] The high-temperature reaction gas and catalyst fine powder are roughly separated. After the rough separation, the three-stage cyclone separator 5 can perform better gas-solid separation, thereby reducing the content of catalyst fine powder in the high-temperature reaction gas discharged into the quenching tower 15; the second pulse high-temperature dust collector 6 further performs gas-solid separation on the high-temperature reaction gas discharged from the three-stage cyclone separator 5, filters out the catalyst fine powder therein, and further extends the operation cycle of the subsequent heat exchanger 16 and the quenching tower 15; the catalyst particles in the high-temperature reaction gas discharged from the reactor 1 are filtered out by the catalyst particle filter 3, and the catalyst fine powder and the reaction gas are discharged into the three-stage cyclone separator 5 through the catalyst particle filter 3. These catalyst particles are not worn out to become catalyst fine powder, and can be recycled and reused, and are guided back to the reactor 1 through the Roots blower 4 for catalyst replenishment, thereby reducing production costs.

[0128] like Fig.12 As shown, the first embodiment of the fan blade 353 is as follows: V-shaped grooves 11 are evenly formed at the outer end of the counterclockwise side of the fan blade 353, and the V-shaped grooves 11 are distributed along the width direction of the fan blade 353, thereby enhancing the turbulence dispersion effect on the reaction gas during the rotation of the fan blade 353.

[0129] like Fig.13 As shown, the second embodiment of the fan blade 353 is as follows: a wavy groove 12 is provided at the outer end of the counterclockwise side of the fan blade 353, and the wavy groove 12 is distributed along the width direction of the fan blade 353, so as to enhance the turbulence dispersion effect on the reaction gas during the rotation of the fan blade 353.

[0130] like Fig.14 As shown, the third embodiment of the fan blade 353 is as follows: the outer end of the fan blade 353 on one side in the counterclockwise direction is evenly provided with second turbulent flow holes 13, so as to enhance the turbulent flow dispersion effect on the reaction gas during the rotation of the fan blade 353.

[0131] like Fig.15 As shown, a clamping structure 9 is provided between the housing 31 and the upper cover 32, which includes:

[0132] A groove 91 is formed at the upper edges of the left and right sides of the housing 31, and an arc-shaped slot 92 is formed on the bottom surface of the groove 91;

[0133] The lower edge of the upper cover 32 corresponds to the grooves 91 on both sides and is respectively fixedly connected with elastic metal plates 93, and the elastic metal plates 93 are inserted into the corresponding grooves 91;

[0134] An arc-shaped block 94 is integrally formed on the inner wall of the elastic metal plate 93 corresponding to the arc-shaped slot 92, and the arc-shaped block 94 is snapped into the corresponding arc-shaped slot 92 to achieve snap-fit ​​fixation of the shell 31 and the upper cover 32. When disassembly is required, the shell 31 and the upper cover 32 are separated by force, the elastic metal plate 93 is deformed, and the arc-shaped block 94 is separated from the arc-shaped slot 92.

[0135] In the above embodiment, the pipes connecting the devices are all provided with flow regulating valves, which can control the on-off of the pipes and the flow of exhaust gas; the discharge valves at the bottom of the four-stage cyclone separator 7 and the first pulse high-temperature dust collector 8 are connected to the waste agent storage tank 2 to collect the catalyst fine powder for subsequent treatment;

[0136] In the above embodiments, the materials used for the devices are all made of high temperature resistant materials, such as S32168 stainless steel or a combination of S32168 stainless steel and 15CrMoR alloy steel.

[0137] The above-mentioned process equipment and use method include technologies that have been updated for multiple iterations, and the main protection focus is on intercepting and removing catalyst fine powder discharged from the reaction gas of the third-stage cyclone separator 5 and the fourth-stage cyclone separator 7.

[0138] The method for intercepting and removing catalyst fine powder from a reaction gas system uses the above-mentioned related process equipment for intercepting and removing catalyst fine powder from a reaction gas system, and includes the following steps:

[0139] S1 catalyst particle recycling, the high temperature reaction gas output from the reactor (1) is passed into the catalyst particle filter (3), and the catalyst particle filter (3) transports the separated catalyst particles back to the reactor (1) through the Roots blower (4);

[0140] Removal of catalyst fine powder from S2 high-temperature reaction gas. The high-temperature reaction gas from which catalyst particles are removed, output from the catalyst particle filter 3, is passed into the three-stage cyclone separator 5. The three-stage cyclone separator 5 passes the high-temperature reaction gas from which catalyst fine powder is separated into the heat exchanger 16 and the quenching tower 15. The high-temperature reaction gas from which catalyst fine powder is separated is first subjected to heat exchange and cooling and then rapidly cooled and collected. A small amount of gas and catalyst fine powder are discharged from the lower valve of the three-stage cyclone separator 5 and enter the four-stage cyclone separator 7.

[0141] S3: Removal of catalyst fine powder from the remaining reaction gas. The four-stage cyclone separator 7 separates a small amount of gas and catalyst fine powder discharged from the lower valve of the three-stage cyclone separator 5. The removed catalyst fine powder is discharged and collected. The reaction gas output from the four-stage cyclone separator 7 is passed into the first pulse high-temperature dust collector 8.

[0142] The catalyst fine powder in the reaction gas output by the S4 four-stage cyclone separator is removed, and the reaction gas output by the four-stage cyclone separator 7 is filtered through the first pulse high-temperature dust collector 8. The filtered catalyst fine powder is discharged from the lower valve of the first pulse high-temperature dust collector 8, and the reaction gas from which the catalyst fine powder is removed is passed into the quenching tower 15.

[0143] Working principle:

[0144] The reactor 1 is integrated with a primary cyclone separator and a secondary cyclone separator. After the two-stage separation, the high-temperature reaction gas and the catalyst particles are separated by a catalyst particle filter. The filtered catalyst particles are guided back to the reactor by a Roots blower. The high-temperature reaction gas after the catalyst particles are filtered out by the catalyst particle filter first enters a third-stage cyclone separator 5. The third-stage cyclone separator 5 separates the catalyst fine powder in the high-temperature reaction gas. A small amount of gas and a discharge valve of the catalyst fine powder at the bottom of the third-stage cyclone separator 5 are fixedly connected to a fourth-stage cyclone separator 7 through a pipeline, and the high-temperature reaction gas output end of the third-stage cyclone separator 5 is fixedly connected to a heat exchanger 16 and a quenching tower 15 in sequence through a pipeline, and is collected after passing through the heat exchanger 16 and the quenching tower 15;

[0145] The high-temperature reaction gas output end of the four-stage cyclone separator 7 is fixedly connected to the first pulse high-temperature dust collector 8 through a pipeline. The first pulse high-temperature dust collector 8 filters the catalyst fine powder in the remaining reaction gas, and the remaining reaction gas with the catalyst fine powder filtered out is discharged into the quenching tower 15. The four-stage cyclone separator 7 and the discharge valve at the bottom of the first pulse high-temperature dust collector 8 discharge the catalyst fine powder. The first pulse high-temperature dust collector 8 is connected to the reaction gas output end at the upper end of the four-stage cyclone separator 7 as a gas-solid separation device, which greatly reduces the catalyst content in the reaction gas entering the quenching water system in this process, reduces the wear and blockage probability of the components in the quenching water system, improves work efficiency, extends its operation cycle, reduces the cleaning frequency of the components in the quenching water system, reduces the energy consumption of the device, makes the pressure difference of the equipment stable, and reduces safety risks.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Related process equipment for intercepting and removing catalyst fine powder from the reaction gas system, characterized by: It comprises a reactor (1), the high-temperature reaction gas output end of which is fixedly connected to a three-stage cyclone separator (5) via a pipeline; The discharge valve for a small amount of gas and catalyst fine powder at the bottom of the three-stage cyclone separator (5) is fixedly connected to the four-stage cyclone separator (7) through a pipeline, and the high-temperature reaction gas output end of the three-stage cyclone separator (5) is fixedly connected to the heat exchanger (16) and the quench tower (15) in sequence through a pipeline; The high-temperature reaction gas output end of the four-stage cyclone separator (7) is fixedly connected to the first pulse high-temperature dust collector (8) through a pipeline, and the high-temperature reaction gas output end of the first pulse high-temperature dust collector (8) is fixedly connected to the quenching tower (15) through a pipeline; The discharge valves at the bottom of the four-stage cyclone separator (7) and the first pulse high-temperature dust collector (8) discharge the catalyst fine powder; The first pulse high-temperature dust collector (8) comprises: a pulse high-temperature dust collector (81) having a mounting frame disposed therein; A high temperature resistant composite filter element (82) which is tubular with a sealed bottom end, and a flange is provided at the upper end of the outer wall of the high temperature resistant composite filter element (82); The high temperature resistant composite filter element (82) is inserted into the mounting opening of the mounting frame, and a sealing ring (83) is provided between the flange of the high temperature resistant composite filter element (82) and the upper surface of the mounting frame; It also includes a catalyst particulate filter (3) and a Roots blower (4). The gas input and filtered gas output ends of the catalyst particle filter (3) are fixedly connected to a position between the high-temperature reaction gas output end of the reactor (1) and the input end of the three-stage cyclone separator (5); The discharge valve at the bottom of the catalyst particle filter (3) is fixedly connected to the lower end of the reactor (1) via a Roots blower (4); The catalyst particle filter (3) comprises: A housing (31) having an upper cover (32) buckled on its upper end; The shell (31) is fixedly connected to a conical cover (33) on the side away from the reactor (1), and the smaller end of the conical cover (33) is fixedly connected to the input end of the third-stage cyclone separator (5) through a pipeline; An arc-shaped high-temperature-resistant composite filter plate (34) is inserted into the inner wall of the shell (31) at a side away from the reactor (1), and the upper end of the arc-shaped high-temperature-resistant composite filter plate (34) is fixed to the bottom surface of the upper cover (32) by machining; The front and rear side walls of the inner cavity of the housing (31) are rotatably equipped with an impeller (35), and the outer end of the impeller (35) is slidably fitted with the arc-shaped concave inner wall of the arc-shaped high-temperature resistant composite filter plate (34) after rotation; The bottom of the housing (31) is fixedly connected to a hopper (36), and the lower end of the hopper (36) is fixedly connected to a pneumatic regulating valve discharge pipe (37); The pneumatic regulating valve discharge pipe (37) is fixedly connected to the input end of the Roots blower (4); The aperture of the arc-shaped high-temperature resistant composite filter plate (34) is the maximum particle size of the catalyst fine powder to be removed; The impeller (35) comprises: A round rod (351) rotatably mounted in the middle of the front and rear side walls of the inner cavity of the housing (31); The outer wall of the round rod (351) is fixedly sleeved with a sleeve (352); The outer wall of the sleeve (352) is evenly and fixedly equipped with fan blades (353) at the circumference, and the fan blades (353) are distributed along the length direction of the outer wall of the sleeve (352); The number of the fan blades (353) is six; The outer end of the fan blade (353) is slidably fitted with the inner wall of the arc-shaped concave surface of the arc-shaped high-temperature-resistant composite filter plate (34); The outer end edges of the fan blades (353) are evenly provided with first turbulent flow holes (10); V-shaped grooves (11) are evenly formed at the outer end of one side of the fan blade (353) in the counterclockwise direction, and the V-shaped grooves (11) are distributed along the width direction of the fan blade (353).

2. The process equipment for intercepting and removing catalyst fine powder from a reaction gas system according to claim 1, characterized in that: The high temperature resistant composite filter element (82) is specifically a high air permeability inorganic aluminum silicate composite material filter element.

3. The process equipment for intercepting and removing catalyst fine powder from a reaction gas system according to claim 1, characterized in that: Also includes: A second pulse high temperature dust collector (6) having the same structure as the first pulse high temperature dust collector (8); The gas input and upper gas output end of the second pulse high-temperature dust collector (6) are fixedly connected to a position between the high-temperature reaction gas output end of the three-stage cyclone separator (5) and the input end of the heat exchanger (16); The discharge valve for a small amount of gas and catalyst fine powder at the bottom of the second pulse high-temperature dust collector (6) is fixedly connected to the input end of the fourth-stage cyclone separator (7) through a pipeline.

4. The process equipment for intercepting and removing catalyst fine powder from a reaction gas system according to claim 1, characterized in that: Also included is an air intake buffer structure (14), which includes: A tank body (141), the middle of which is fixedly connected to a pipeline connecting the third-stage cyclone separator (5) and the reactor (1); An overflow flow regulating valve (143) is installed on the pipeline between the tank body (141) and the third-stage cyclone separator (5); A sediment discharge pipe (144) is fixedly connected between the lower end of the tank body (141) and the third-stage cyclone separator (5), and a sediment flow regulating valve (142) is mounted on the sediment discharge pipe (144).

5. A method for intercepting and removing catalyst fine powder from a reaction gas system, using the relevant process equipment for intercepting and removing catalyst fine powder from a reaction gas system as claimed in any one of claims 1 to 4, characterized in that: The steps include: S1, recycling the catalyst particles, passing the high-temperature reaction gas output from the reactor (1) into the catalyst particle filter (3), and the catalyst particle filter (3) transports the separated catalyst particles back to the reactor (1) through the Roots blower (4); S2, preliminary removal of catalyst fine powder, the high-temperature reaction gas from which the catalyst particles are filtered out from the catalyst particle filter (3) is passed into the three-stage cyclone separator (5), the three-stage cyclone separator (5) passes the high-temperature reaction gas from which the catalyst fine powder is separated into the heat exchanger (16) and the quenching tower (15), the high-temperature reaction gas from which the catalyst fine powder is separated is first subjected to heat exchange and cooling, and then rapidly cooled and collected, a small amount of gas and catalyst fine powder are discharged from the lower valve of the three-stage cyclone separator (5) into the four-stage cyclone separator (7); S3, intercepting and removing the catalyst fine powder from the third to fourth cyclones, separating a small amount of gas discharged from the lower valve of the third cyclone separator (5) and the catalyst fine powder through a fourth cyclone separator (7), discharging the catalyst fine powder and collecting it, and the reaction gas output from the fourth cyclone separator (7) is introduced into a first pulse high temperature dust collector (8); S4, intercepting and removing the catalyst fine powder in the reaction gas output by the four-stage cyclone separator (7), filtering the reaction gas output by the four-stage cyclone separator (7) through the first pulse high-temperature dust collector (8), and the filtered catalyst fine powder is discharged from the lower valve of the first pulse high-temperature dust collector (8), and the reaction gas from which the catalyst fine powder is removed is introduced into the quenching tower (15).

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