CN111617534A - A purification and separation system for catalytic gasification catalyst recovery of MTO device - Google Patents

Abstract

The invention belongs to the technical field of energy saving and environmental protection of MTO devices, and discloses a purification and separation system for the recovery of catalytic gasification catalysts of MTO devices, which comprises at least one set of purification and separation filters, an automatic control unit and a valve group; The inlet, outlet, backflushing cleaning port and slag discharge and ash discharge port are installed inside the purification separation filter with filtering separation elements and backflushing cleaning elements. The automatic control unit can control the opening and closing of any automatic control valve in the valve group. The valve group It includes a first automatic control valve, a second automatic control valve, a third automatic control valve and a fourth automatic control valve. The first control valve is set on the inlet pipeline of the purification and separation filter, and the second automatic control valve is set on the purification and separation filter. On the outlet pipeline of the filter, the third automatic control valve is arranged on the backflushing and cleaning port pipeline of the purification and separation filter, and the fourth automatic control valve is arranged on the slag discharge and ash discharge outlet pipeline of the purification and separation filter.

Description

A purification and separation system for catalytic gasification catalyst recovery of MTO device

technical field

The invention relates to the technical field of energy saving and environmental protection of MTO devices, in particular to a purification and separation system used for the recovery of catalytic gasification catalysts of MTO devices.

Background technique

At present, the MTO process is the latest production technology developed in the coal chemical industry chain. There are less than 5 units under construction in China, and the completed units are still in the trial operation stage, far from reaching production and running smoothly.

In the existing MTO device catalytic gasification catalyst solution purification process, the plate and frame filter press equipment is basically used for filter residue treatment. The filter press is an open type equipment, which will cause liquid splashing and odor due to extrusion during operation. Diffusion, resulting in poor working environment; and the filter press equipment is bulky, the number of filter cloths is large, the frequency of cleaning and replacement is high, and the parking lot is frequent. Whether it is early investment or post-maintenance, the cost is very high; limited by the existing filter cloth materials, Generally, the filtration accuracy is not high, and it is difficult to meet the feeding requirements of subsequent process equipment.

Therefore, there is a need in the art for a purification and separation system for catalytic gasification catalyst recovery of MTO devices to solve the above problems.

SUMMARY OF THE INVENTION

In the existing MTO device catalytic gasification catalyst solution purification process, the plate and frame filter press equipment is basically used for filter residue treatment. The filter press is an open type equipment, which will cause liquid splashing and odor due to extrusion during operation. Diffusion, resulting in poor working environment; and the filter press equipment is bulky, the number of filter cloths is large, the frequency of cleaning and replacement is high, and the parking lot is frequent. Whether it is early investment or post-maintenance, the cost is very high; limited by the existing filter cloth materials, Generally, the filtration accuracy is not high, and it is difficult to meet the feeding requirements of subsequent process equipment. In order to solve the above-mentioned problems in the prior art, the present invention provides a purification and separation system for the recovery of catalytic gasification catalysts of an MTO device, which at least includes a set of purification and separation filters, an automatic control unit and a valve group; the purification and separation filters It is provided with inlet, outlet, backflushing cleaning port and slag discharge and ash discharge port. The filter element and backflushing cleaning element are installed inside the purification separation filter. The automatic control unit can control the opening and closing of any automatic control valve. The valve group includes the first Automatic control valve, second automatic control valve, third automatic control valve and fourth automatic control valve, the first control valve is arranged on the inlet pipeline of the purification separation filter, and the second automatic control valve is arranged at the outlet of the purification separation filter On the pipeline, the third automatic control valve is arranged on the backflushing and cleaning port pipeline of the purification and separation filter, and the fourth automatic control valve is arranged on the slag discharge and ash discharge outlet pipeline of the purification and separation filter.

In the above preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalysts of MTO devices, the purification and separation filter is provided with an orifice plate, the filter element is installed on the orifice plate, and the orifice plate divides the filter into a first chamber and a The second chamber, the first chamber is provided with an inlet, the second chamber is provided with an outlet, the bottom of the first chamber is provided with a slag discharge port, and the second chamber is provided with a backflushing cleaning port.

In the above-mentioned preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalyst of an MTO device, the filter element is a cylindrical structure, the first end of the filter element is a closed structure, and the second end is an open structure; the filter element material is a metal material, The filter element changes its original shape after being subjected to external force. When the external force is removed, the filter element will return to its original shape.

In the above preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalysts of MTO devices, the automatic control unit is a PLC automatic control unit, and the PLC automatic control unit is respectively connected with the first automatic control valve, the second automatic control valve, the third automatic control valve, and the third automatic control valve The automatic control valve and the fourth automatic control valve are electrically connected, and the PLC automatic control unit can control the opening and closing of the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve.

In the above preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalysts of MTO devices, the purification and separation filters are all provided with a plurality of online backflushing cleaning pipes, and the backflushing cleaning pipes are arranged in the backflushing cleaning of the purification separation filter. mouth.

In the above-mentioned preferred technical solution of the purification and separation system for catalytic gasification catalyst recovery of the MTO device, the inlet pipe and the outlet pipe of the purification and separation filter are both provided with a pressure measuring device, and the pressure measuring device is electrically connected with the automatic control unit to connect the pressure The signal is fed back to the automatic control unit.

In the above-mentioned preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalysts of MTO devices, the pressure measurement device at the inlet pipe of the purification separation filter is the first pressure measurement device, and the first pressure measurement device is arranged on the inlet pipe , and is located at the rear end of the first automatic control valve.

In the above preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalysts of MTO devices, the pressure measurement device at the outlet pipe of the purification separation filter is a second pressure measurement device, and the second pressure measurement device is arranged on the outlet pipe , and is located at the front end of the second automatic control valve.

In the preferred technical solution of the above purification and separation system for catalytic gasification catalyst recovery of MTO devices, the body of the purification and separation filter is provided with a temperature measuring device, and the temperature measuring device is electrically connected to the automatic control unit, and the temperature signal is fed back to the automatic control unit. unit.

In the above preferred technical solution of the purification and separation system for the recovery of catalytic gasification catalysts in MTO devices, the automatic control unit adopts a control mode in which pressure difference control and time control are coordinated with each other, and the pressure difference control and time control are in a coordinated control mode with each other. It is a filter for purification and separation installed and operated in parallel to control the opening of the third automatic control valve at the backflushing cleaning port by detecting the pressure difference between the inlet and the outlet, and at the same time set the time value of the backflushing cleaning. When the time value is reached , even if the pressure difference between the inlet and the outlet does not reach the condition that the backflushing cleaning port is opened, the automatic control unit still starts to perform the action of backflushing and cleaning the filter element.

Those skilled in the art can understand that, in the preferred technical solution of the purification and separation system for the recovery of the catalytic gasification catalyst of the MTO device of the present invention, the purification separation and filtration of the purification and separation system for the recovery of the catalytic gasification catalyst of the MTO device The filter adopts high-precision purification and separation filter elements with high pollution, high pressure and easy cleaning to replace the existing plate and frame filter press equipment, which has a huge impact on the recovery of MTO device catalyst, the reduction of operating costs and the saving of water resources. Practical significance and considerable economic value. The purification and separation system used for the recovery of catalytic gasification catalyst of the MTO device can realize the online backflushing regeneration of the purification and separation filter, reduce the number of shutdowns, and greatly reduce the operating cost. It solves the technical problem that the catalyst cycle of the current MTO device cannot run stably, and creates a feasible technical route for the MTO device to achieve continuous and stable operation.

(1) The current plate and frame filter press technology is open to work, dispersing splashing liquid and gas, and the working environment is poor. The purification and separation system of the present invention can be carried out under airtight conditions to avoid liquid splashing and gas dispersion;

(2) In the traditional process, the filter cloth in the plate and frame filter press is used as a purification and separation element. The installation and replacement are labor-intensive, and the pressure strength of the cloth bag is poor, which is easy to be pierced by hard particles. , causing equipment wear, scaling, etc. The purification and separation system of the present invention uses a high-precision metal filter element as a purification and separation element, which has large filtering area, small equipment volume, high pressure resistance, no perforation and corrosion resistance, and long overall equipment life.

(3) If the filter cloth is pierced in the traditional process, due to the huge number of cloth bags, it is necessary to detect each filter bag one by one and replace it, which is labor-intensive. On the other hand, in the purification and separation system of the present invention, the filter element has high temperature resistance and high strength, and the slag particles are intercepted on the smooth surface without perforation, the service life is long, and the labor intensity is low.

(4) The number of traditional filter cloths is large, the cost is high, the frequency of replacement and cleaning is high, the water consumption is large, and a large amount of cleaning sewage is generated. The operation of cleaning, installation and replacement is labor-intensive, workload is large, and labor costs are high. The purification and separation system of the invention can realize online backflushing by automatically controlling the opening of the backflushing port, the filter element has a long service life, and the frequency of entering equipment for maintenance is reduced. The filter element is installed independently in the equipment, and the personnel can enter the equipment to disassemble and assemble the filter element during maintenance, without the need for lifting machinery and crane equipment, the replacement operation is simple, and manpower is saved.

(5) It is difficult to peel off the filter cake of the traditional process filter cloth, and even need to add filter aid to fall off smoothly. The purification and separation system of the present invention can realize online backflushing by opening the backflushing port through the automatic control system, and fully realize automatic operation.

(6), the purification and separation system of the present invention can realize the parallel connection of multiple filters, and each filter device can be used as a backup device for each other, so as to ensure that the normal filtration of the system is not affected during backflushing and maintenance of a single device;

(7) The backflushing gas adopts nitrogen or compressed air, or the filtered liquid can be used to introduce backflushing from the outlet pipeline (represented by the dotted line in Figure 1) to save energy;

(8) The filter residue from the backflushing is collected in the slag collecting area, and then subjected to a centralized treatment after multiple backflushing, and is discharged to the designated position by pipeline transportation, so as to avoid the need to discharge each equipment every time it is backflushed. slag treatment;

(9) The amount of gas used for backflushing is small, the time is short, and the efficiency of backflushing and regeneration is high.

Description of drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

Fig. 1 is the pipeline flow chart one of the purification separation system used for MTO device catalyst recovery of the present invention;

Fig. 2 is the pipeline flow chart two of the purification separation system used for MTO device catalyst recovery of the present invention;

Reference numerals: 1. Purification and separation filter; 2. Inlet; 3. Outlet; 4. Back-flushing cleaning port; 5. Slag discharge port; 6. Filter element; Automatic control valve; 9. Third automatic control valve; 10. Fourth automatic control valve; 11. First pressure measuring device; 12. Second pressure measuring device; 13. Temperature measuring device.

Detailed ways

The embodiments of the present invention are described below by specific specific embodiments. Those who are familiar with the technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that, in the description of the present invention, the terms "middle", "upper", "lower", "horizontal", "inner", etc. indicate directions or terms in positional relationship based on the directions shown in the drawings or The positional relationship is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be fixed The connection can also be a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the existing MTO device catalytic gasification catalyst solution purification treatment process pointed out based on the background technology, the plate and frame filter press equipment is basically used for filter residue treatment. This leads to liquid splashing and odor diffusion, resulting in poor working environment; and the filter press equipment is bulky, the number of filter cloths is large, the frequency of cleaning and replacement is high, and the parking lot is frequent. Whether it is early investment or post-maintenance, the cost is very high; limited by the existing The filter cloth material is generally not high in filtration accuracy, and it is difficult to meet the feeding requirements of the subsequent process equipment. In the purification and separation system for the recovery of the catalytic gasification catalyst of the MTO device of the present invention, the purification and separation filter adopts a high-contamination, high-pressure, easy-to-clean high-precision purification and separation filter element to replace or supplement the existing plate and frame filter press The equipment has great practical significance and considerable economic value for the recovery of catalytic gasification catalysts of MTO units, the reduction of operating costs and the conservation of water resources. The purification and separation system for catalytic gasification catalyst recovery of an MTO device can realize online backflushing and regeneration of purification and separation filters, reduce the number of shutdowns, and greatly reduce operating costs. It solves the technical problem that the catalytic gasification catalyst of the current MTO device cannot be operated stably, and creates a feasible technical route for the continuous and stable operation of the MTO device. The separation system of the present invention can be filtered under airtight conditions to avoid liquid splashing and gas dispersion; the separation system of the present invention uses a high-precision metal filter element as a purification and separation element, which has a large filtering area, small equipment volume, high pressure resistance, and no perforation. And corrosion resistance, the overall life of the equipment is long. In the separation system of the invention, the filter element has high temperature resistance and high strength, the slag particles are intercepted on the smooth surface without perforation, the service life is long, and the labor intensity is low. The filtering system of the invention can realize online backflushing by automatically controlling the opening of the backflushing port, the filter element has a long service life, and the frequency of entering equipment for maintenance is reduced. The filter element is installed independently in the equipment, and the personnel can enter the equipment to disassemble and assemble the filter element during maintenance, without the need for lifting machinery and crane equipment, the replacement operation is simple, and manpower is saved. The filtration system of the purification and separation system of the present invention can realize online backflushing by opening the backflushing port through the automatic control system, and fully realize automatic operation. The purification and separation system of the invention can realize the parallel connection of multiple filters, and the filter devices can be used as backup devices for each other, so as to ensure that the normal filtration of the system is not affected during backflushing and maintenance of a single device; the backflushing gas adopts nitrogen or compressed air. , the filtered liquid can also be introduced from the outlet pipeline for backflushing to save energy; the filter residues from the backflushing are collected in the slag collecting area, and then subjected to a centralized treatment after multiple backflushing, and are discharged by pipeline transportation. To the designated position, to avoid the need for slag discharge treatment every time each equipment is backflushed; the amount of gas used for backflushing is small, the time is short, and the efficiency of backflushing and regeneration is high.

Specifically, as shown in Figures 1 and 2, the purification and separation system for catalytic gasification catalyst recovery of an MTO device of the present invention includes at least one group of purification and separation filters 1, an automatic control unit and a valve group (multiple groups are installed in parallel). The method is connected to the main pipeline, and each filter equipment can be used as backup equipment for each other to ensure that the normal filtration of the system will not be affected during backflushing and single equipment maintenance); purification and separation filter 1 is provided with inlet 2, outlet 3, and backflushing cleaning ports 4 and slag discharge and ash discharge port 5, the purification separation filter 1 is equipped with a filter element and a backflushing cleaning element, and the automatic control unit can control the opening and closing of any automatic control valve. The valve group includes a first automatic control valve 7, a second automatic control valve The automatic control valve 8, the third automatic control valve 9 and the fourth automatic control valve 10, the first control valve is set on the inlet 2 pipeline of the purification separation filter 1, and the second automatic control valve 8 is set on the purification separation filter 1. On the outlet pipeline 3, the third automatic control valve 9 is set on the backflushing and cleaning port pipeline 4 of the purification and separation filter 1, and the fourth automatic control valve 10 is set on the slag discharge and ash discharge port of the purification and separation filter 1. On road 5. In the present invention, the first automatic control valve 7 , the second automatic control valve 8 , the third automatic control valve 9 and the fourth automatic control valve 10 are in the prior art. The specific working process is as follows: the dirty catalyst solution enters the purification and separation filter 1 through the inlet 2 of the purification and separation filter 1, and after the slag is intercepted by the filter and separation element (filter element 6), the clean catalyst solution flows out from the outlet 3, and the filter and separation element is blocked. After that, the backflushing gas or the filtered liquid is introduced into the backflushing cleaning port 4 to clean and restore the filter separation element online. The intercepted purging filter residue is discharged from the slag discharge and ash discharge port 5. After several backflushing, a concentration is carried out. Discharge to the designated location by pipeline transportation, so as to avoid the need for slag discharge treatment every time each equipment is backflushed.

Preferably, an orifice plate is arranged inside the purification and separation filter 1, the filter element 6 is installed on the orifice plate, and the orifice plate divides the filter into a first chamber and a second chamber, the first chamber is provided with an inlet 2, The second chamber is provided with an outlet 3 , the bottom of the first chamber is provided with a slag discharge port 5 , and the second chamber is provided with a backflushing cleaning port 4 .

In the present invention, the internal structure of the filter is divided into two schemes. The first scheme is shown in Figure 1. The first chamber and the second chamber are arranged up and down, the first chamber is at the bottom, and the second chamber is at the top. , the first chamber is provided with an inlet 2, the second chamber is provided with an outlet 3, the bottom of the first chamber is provided with a slag discharge port 5, and the top of the second chamber is provided with a backflushing cleaning port 4; the second scheme As shown in Figure 2, the first chamber and the second chamber are arranged inside and outside, the second chamber is inside the first chamber, the first lower chamber is provided with an inlet 2, and the second upper chamber is provided with an outlet 3, The bottom of the first chamber is provided with a slag discharge port 5 , and the second chamber is provided with a backflushing cleaning port 4 . These two methods can achieve the purpose of the present invention, but the purging effect of the second scheme is better than that of the first scheme.

Preferably, the filter element 6 is a cylindrical structure, the first end of the filter element 6 is a closed structure, and the second end is an open structure; the filter element 6 is made of metal material, and the filter element 6 changes its original shape after being subjected to external force. After undoing, the filter element 6 will return to its original shape.

Preferably, the automatic control unit is a PLC automatic control unit, and the PLC control unit can be installed on-site, and can also be connected to a DCS (distributed control system) by remote transmission, and the DCS can be used for centralized control. The PLC automatic control unit is respectively electrically connected with the first automatic control valve 7 , the second automatic control valve 8 , the third automatic control valve 9 and the fourth automatic control valve 10 , and the PLC automatic control unit can control the first automatic control valve 7 , the third automatic control valve 7 and the fourth automatic control valve 10 The opening and closing of the second automatic control valve 8, the third automatic control valve 9 and the fourth automatic control valve 10.

Preferably, each of the purification and separation filters 1 is provided with a plurality of online backflushing cleaning pipes, and the backflushing cleaning pipes are arranged at the backflushing cleaning port 4 of the purification and separation filter 1 . The nozzle and pipeline of online backflushing cleaning can be connected to the main pipe of clean catalyst solution at the filter outlet 3, or it can be connected to the utility pipeline of nitrogen or compressed air separately. Nitrogen or compressed air can be used as the gas medium for backflushing cleaning.

Preferably, as shown in FIG. 1 , both the inlet pipe 2 and the outlet pipe 3 of the purification separation filter 1 are provided with a pressure measuring device, which is electrically connected to the automatic control unit and feeds back pressure signals to the automatic control unit. In the present invention, the pressure measuring device is the prior art, and the pressure measuring device is a pressure sensor.

Preferably, as shown in FIGS. 1 and 2 , the pressure measurement device at the inlet pipe 2 of the purification separation filter 1 is a first pressure measurement device 11 , and the first pressure measurement device 11 is arranged on the inlet pipe 2 and located at the first The rear end of the automatic control valve 7.

Preferably, as shown in FIGS. 1 and 2 , the pressure measurement device at the outlet pipe 3 of the purification separation filter 1 is a second pressure measurement device 12 , and the second pressure measurement device 12 is arranged on the outlet pipe 3 and is located in the second pressure measurement device 12 . The front end of the automatic control valve 8.

Preferably, as shown in Figures 1 and 2, the body of the purification separation filter 1 is provided with a temperature measuring device 13, which is electrically connected to the automatic control unit, and feeds back the temperature signal to the automatic control unit. In the present invention, the temperature measuring device 13 is the prior art, and the temperature measuring device 13 is a temperature sensor.

Preferably, the automatic control unit adopts a control method in which differential pressure control and time control cooperate with each other. 3 pressure difference to control the opening of the third automatic control valve 9 at the backflushing cleaning port 4, and set the time value of backflushing cleaning, when the time value is reached, even if the pressure difference between the inlet 2 and the outlet 3 does not reach the Under the condition that the blowing and cleaning port 4 is opened, the automatic control unit still starts to perform the action of backflushing and cleaning the filter element.

So far, the technical solutions of the present invention have been described with reference to the preferred embodiments shown in the accompanying drawings, however, those skilled in the art can easily understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. a purification separation system that is used for MTO device catalytic gasification catalyst recovery, is characterized in that, comprises at least one group of purification separation filter, automatic control unit and valve group; Purification separation filter is provided with inlet, outlet, backflushing Cleaning port and slag and ash discharge port, filter element and backflushing cleaning element are installed inside the purification and separation filter. The automatic control unit can control the opening and closing of any automatic control valve. The valve group includes a first automatic control valve and a second automatic control valve. valve, the third automatic control valve and the fourth automatic control valve, the first control valve is set on the inlet pipeline of the purification separation filter, the second automatic control valve is set on the outlet pipeline of the purification separation filter, the third automatic control valve The fourth automatic control valve is arranged on the slag discharge and ash discharge outlet pipeline of the purification and separation filter. 2. the purification separation system that is used for MTO device catalytic gasification catalyst recovery according to claim 1, is characterized in that, purification separation filter interior is provided with orifice plate, filter element is installed on orifice plate, orifice plate divides filter into. It is the first chamber and the second chamber, the first chamber is provided with an inlet, the second chamber is provided with an outlet, the bottom of the first chamber is provided with a slag discharge port, and the second chamber is provided with a backflushing cleaning port . 3. The purification separation system for MTO device catalytic gasification catalyst recovery according to claim 2, wherein the filter element is a cylindrical structure, the first end of the filter element is a closed structure, and the second end is an open structure; The filter element is made of metal material. After the filter element is subjected to external force, it changes its original shape. When the external force is withdrawn, the filter element will return to its original shape. 4. the purification separation system that is used for MTO device catalytic gasification catalyst recovery according to claim 1, is characterized in that, automatic control unit is PLC automatic control unit, PLC automatic control unit and first automatic control valve, second automatic control unit respectively The automatic control valve, the third automatic control valve and the fourth automatic control valve are electrically connected, and the PLC automatic control unit can control the opening and closing of the first automatic control valve, the second automatic control valve, the third automatic control valve and the fourth automatic control valve. closure. 5. The purification separation system for MTO device catalytic gasification catalyst recovery according to claim 1, wherein the purification separation filter is provided with a plurality of online backflushing cleaning pipes, and the backflushing cleaning pipes are arranged in the purification separation At the backflush cleaning port of the filter. 6. the purification separation system for MTO device catalytic gasification catalyst recovery according to claim 1, is characterized in that, the inlet pipe and the outlet pipe of purification separation filter are all provided with pressure measuring device, pressure measuring device and automatic control The unit is electrically connected, and the pressure signal is fed back to the automatic control unit. 7. The purification separation system for MTO device catalytic gasification catalyst recovery according to claim 6, wherein the pressure measurement device at the inlet pipe of the purification separation filter is the first pressure measurement device, and the first pressure measurement The device is arranged on the inlet pipe and is located at the rear end of the first automatic control valve. 8. The purification separation system for MTO device catalytic gasification catalyst recovery according to claim 6, wherein the pressure measurement device at the outlet pipe of the purification separation filter is a second pressure measurement device, and the second pressure measurement The device is arranged on the outlet pipe and is located at the front end of the second automatic control valve. 9. The purification separation system for MTO device catalytic gasification catalyst recovery according to claim 1, wherein the body of the purification separation filter is provided with a temperature measurement device, and the temperature measurement device is electrically connected to the automatic control unit, and the The temperature signal is fed back to the automatic control unit. 10. The purification and separation system for catalytic gasification catalyst recovery of an MTO device according to claim 1, wherein the automatic control unit adopts a control mode in which pressure difference control and time control cooperate with each other, and the pressure difference control and time control The control method of controlling each other is to control the opening of the third automatic control valve at the backflushing cleaning port by detecting the pressure difference between the inlet and the outlet, and set the time value of the backflushing cleaning at the same time. When the time value is reached, even if the pressure difference between the inlet and the outlet does not reach the condition that the backflushing cleaning port is opened, the automatic control unit still starts to perform the action of backflushing and cleaning the filter element.

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