Annular arc lifting and steam shoveling combined cleaning device for inner wall of silicon dioxide synthesis kettle

Abstract

The utility model relates to a silicon dioxide synthesis kettle inner wall annular arc lifting steam shoveling combined cleaning device which comprises a synthesis kettle body, an annular steam injection pipe is horizontally arranged in the synthesis kettle body and driven by a lifting mechanism to ascend and descend in the vertical direction, a plurality of injection nozzles are distributed on the peripheral side portion of the steam injection pipe, and the steam injection nozzles are communicated with the synthesis kettle body. An annular scraper knife is fixed at the bottom of the steam injection pipe, a blade of the scraper knife is positioned on the peripheral side of the lower end, an annular cleaning brush sleeves the outer side of the upper end of the scraper knife, and a brush head of the cleaning brush is positioned on the peripheral side and is in contact with the inner side wall of the synthesis kettle body. The steam spraying device is reasonable in design, the steam spraying pipe, the scraper knife and the cleaning brush are combined into a whole, shoveling, brushing and steam are combined, the mode that workers enter the synthesis kettle for operation is replaced, safety and health of workers are guaranteed, labor intensity is relieved, and waste is reduced.

Description

Technical field:

[0002] The utility model relates to a circular arc lifting and steam scraping and cleaning device for the inner wall of a silicon dioxide synthesis kettle. Background technology:

[0004] In the chemical reaction production process of synthesizing high-grade silica slurry by sodium silicate solution and sulfuric acid solution in a synthesis reactor, in addition to strictly controlling the process conditions, it is also necessary to ensure the purity of the raw materials and the cleanliness of the inner wall of the synthesis reactor. The chemical reaction equation is as follows:

[0005] Na2SiO3+H2SO4 = SiO2+Na2SO4+H2O

[0006] In the above reaction production process, the inner wall of the synthesis kettle will gradually form alkali scale. The alkali scale has a certain viscosity and will continue to accumulate and harden. The alkali scale impurities have a great impact on the quality of the silica slurry product in the synthesis kettle and should be removed as much as possible. Although the staff will extend the high-pressure water gun into the kettle to spray and clean it around each time the synthesis kettle is discharged during production, the alkali scale is firmly adhered and the inner wall area of ​​the kettle is large, so the removal effect is poor and the efficiency is low. In order to ensure the quality of the production products, all manufacturers take the approach of stopping the production for a period of time, adding heated sodium hydroxide dilute alkali solution to the synthesis kettle for soaking, and then rinsing; for serious scaling, the staff will carry special tools and safety belts to enter the kettle and use a mobile escalator to scrape and clean up and down. The disadvantages of this cleaning method are: high-altitude operation in the kettle, poor working environment, high labor intensity, long downtime, serious waste of alkali solution, and certain dangers. It is the old problem of cleaning the inner wall of the synthesis kettle in the existing precipitation method of silica production. For this reason, it is necessary to improve the above technical problems, and this case is born from this. Utility model content:

[0008] The utility model makes improvements on the problems existing in the above-mentioned prior art, that is, the technical problem to be solved by the utility model is to provide an arc lifting and steam scraping combined cleaning device for the inner wall of a silicon dioxide synthesis reactor, which has a reasonable design and can not only reduce labor intensity but also improve the cleaning effect.

[0009] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a circular arc lifting and scraping steam combined cleaning device for the inner wall of a silicon dioxide synthesis reactor, comprising a synthesis reactor body, a circular ring-shaped steam injection pipe is horizontally arranged inside the synthesis reactor body, the steam injection pipe is driven by a lifting mechanism to lift and lower vertically, a plurality of injection nozzles are distributed on the outer peripheral side of the steam injection pipe, an circular ring-shaped scraper is fixed to the bottom of the steam injection pipe, the blade of the scraper is located on the peripheral side of the lower end, and an circular ring-shaped cleaning brush is sleeved on the outer side of the upper end of the scraper, and the brush head of the cleaning brush is located on the peripheral side and contacts with the inner side wall of the synthesis reactor body.

[0010] Furthermore, the plurality of injection nozzles are evenly distributed around the axis of the steam injection pipe in a circumferential manner, and the injection nozzles are arranged along the radial direction of the steam injection pipe.

[0011] Furthermore, the steam injection pipe, the scraper, the cleaning brush and the synthesis reactor body are coaxially distributed, and the steam injection pipe, the scraper and the cleaning brush are all composed of several sections spliced ​​together.

[0012] Furthermore, the blade of the scraper is inclined downward, and a gap is provided between the blade of the scraper and the inner side wall of the synthesis reactor body.

[0013] Furthermore, the lifting mechanism includes a pair of lifting cylinders symmetrically distributed on the left and right, the lifting cylinders are vertically arranged above the synthesis kettle body, the telescopic ends of the lifting cylinders are connected to vertically arranged piston rods, the piston rods penetrate downward through the top of the synthesis kettle body and are fixedly connected to the top of the steam injection pipe.

[0014] Furthermore, the lifting mechanism also includes a bidirectional variable frequency motor, and the bidirectional variable frequency motor is electrically connected to a pair of lifting cylinders.

[0015] Furthermore, a steam input pipe is provided on the top of the steam injection pipe, and the steam input pipe is connected to the steam generating device through a delivery hose penetrating the top of the synthesis reactor body.

[0016] Furthermore, the steam generating device includes a steam tank arranged beside the synthesis kettle body, an arc-shaped electric heating block is fixed to the outer wall of the steam tank, a steam output port is provided on the upper end side wall of the steam tank, and the steam output port is connected to a first steam solenoid valve and a second steam solenoid valve arranged in parallel, the first steam solenoid valve is connected to a delivery hose, and the second steam solenoid valve is connected to the synthesis kettle steam inlet valve on the lower end side wall of the synthesis kettle body through a steam delivery pipe.

[0017] Furthermore, a temperature sensor, a radar wave velocity sensor, a safety valve and a pure water inlet solenoid valve are arranged on the top of the steam tank, and a manhole is arranged on the lower side of the steam tank.

[0018] Furthermore, the bottom discharge port of the synthesis kettle body is connected to a drain pipe and a discharge pipe through a three-way joint, a drain solenoid valve is installed on the drain pipe, and a discharge solenoid valve is installed on the discharge pipe; a sulfuric acid valve, a water inlet valve and a sodium silicate solution valve are arranged on the top of the synthesis kettle body, and a stirring assembly is arranged inside the synthesis kettle body.

[0019] Compared with the prior art, the utility model has the following effects: the utility model is reasonably designed, and the steam injection pipe, the scraper and the cleaning brush are combined into one body and raised and lowered synchronously. The steam injection pipe injects steam to the inner wall of the synthesis kettle body, and the alkali scale adhered to the inner wall of the synthesis kettle body is softened, dissolved and flushed at high temperature. The scraper and the cleaning brush are used to sweep, and the shovel, brush and steam are combined to completely, cleanly and efficiently remove the alkali scale on the inner wall of the synthesis kettle, replacing the method of manually entering the synthesis kettle, thereby ensuring the safety and health of the staff, reducing labor intensity and reducing waste. Description of the drawings:

[0021] Figure 1 It is a schematic diagram of the main structure of an embodiment of the utility model;

[0022] Figure 2 yes Figure 1 Schematic diagram of working status in;

[0023] Figure 3 It is a top view schematic diagram of the cooperation between the steam jet pipe, the scraper blade and the cleaning brush;

[0024] Figure 4 It is a schematic diagram of the main structure of the steam jet pipe, scraper blade and cleaning brush;

[0025] Figure 5 is a top view schematic diagram of the steam injection pipe;

[0026] Figure 6 yes Figure 5 Schematic diagram of the decomposition state;

[0027] Figure 7 1. It is a schematic diagram of the disassembled state of the scraper;

[0028] Figure 8 Schematic diagram of the disassembled state of the cleaning brush;

[0029] Fig. 9 It is a control principle diagram of an embodiment of the utility model.

[0030] In the figure:

[0031] 1-synthesis reactor body; 2-steam injection pipe; 3-scraper; 4-cleaning brush; 5-injection nozzle; 6-piston rod; 7-lifting cylinder; 8-speed sensor; 9-bidirectional frequency conversion motor; 10-stirring assembly; 11-sulfuric acid valve; 12-water inlet valve; 13-sodium silicate solution valve; 14-delivery hose; 15-steam tank; 16-electric heating block; 17-manhole; 18-temperature sensor; 19-radar wave velocity sensor; 20-safety valve; 21-pure water inlet solenoid valve; 22-first steam solenoid valve; 23-second steam solenoid valve; 24-synthesis reactor steam inlet valve; 25-steam input pipe; 26-discharge solenoid valve; 27-drainage solenoid valve. Specific implementation method:

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] like Figures 1 to 8 As shown, the utility model is a circular arc lifting and scraping steam combined cleaning device for the inner wall of a silicon dioxide synthesis reactor, comprising a synthesis reactor body 1 with a stirring assembly 10 arranged therein, a circular ring-shaped steam injection pipe 2 is horizontally arranged inside the synthesis reactor body 1, the steam injection pipe 2 is driven by a lifting mechanism to lift vertically, a plurality of injection nozzles 5 are distributed on the outer peripheral side of the steam injection pipe 2, a circular ring-shaped scraper 3 is fixed to the bottom of the steam injection pipe 2, the blade of the scraper 3 is located on the peripheral side of the lower end, a circular ring-shaped cleaning brush 4 is fixedly sleeved on the outer side of the upper end of the scraper 3, the brush head of the cleaning brush 4 is located on the peripheral side and contacts with the inner wall of the synthesis reactor body 1, the steam injection pipe, the scraper and the cleaning brush form a whole, and the three are driven by the lifting mechanism to lift synchronously. During operation, the steam injection pipe 2, the scraper blade 3 and the cleaning brush 4 are combined into one body and are raised and lowered synchronously. The steam injection pipe 2 injects steam to the inner wall of the synthesis reactor body 1, and the alkali scale adhered to the inner wall of the synthesis reactor body 1 is softened, dissolved and flushed at high temperature. The scraper blade 3 and the cleaning brush 4 are used to scrape and sweep, so as to realize the combination of shoveling, brushing and steaming, and the alkali scale on the inner wall of the synthesis reactor can be removed thoroughly, cleanly and efficiently, replacing the method of manually entering the synthesis reactor, thereby ensuring the safety and health of the staff, reducing the labor intensity and reducing the waste.

[0036] In this embodiment, a plurality of injection nozzles 5 are evenly distributed around the axis of the steam injection pipe 2, and the injection nozzles 5 are arranged along the radial direction of the steam injection pipe 2. The injection nozzles inject high-temperature and high-pressure steam onto the inner wall of the synthesis reactor body.

[0037] In this embodiment, the steam injection pipe 2, the scraper blade 3, the cleaning brush 4 and the synthesis reactor body 1 are coaxially distributed.

[0038] In this embodiment, Figure 5-8 As shown, the steam injection pipe 2, the scraper 3 and the cleaning brush 4 are all composed of four sections of detachable splicing, so as to facilitate installation and removal in the synthesis reactor. Each section of the steam injection pipe, the scraper and the cleaning brush are made of high-quality stainless steel, and the adjacent two sections can be connected by flange or slip-on thread.

[0039] In this embodiment, the scraper blade 3 is firmly fixed on the steam injection pipe 2 through a fixed connection piece. The fixed connection between the scraper blade 3 and the steam injection pipe 2 can be a tapping connection after the steam injection pipe is reinforced, or a connection using a plurality of clamps and evenly distributed bolts. The cleaning brush 4 is mounted on the scraper blade 3, which can effectively move and sweep the inner wall of the synthesis reactor body.

[0040] In this embodiment, the blade of the scraper 3 is inclined downward, and there is a gap between the blade of the scraper 3 and the inner wall of the synthesis reactor body 1. The gap between the blade inclined downward and the inner wall of the synthesis reactor is very small, which can effectively scrape the alkali scale adhered to the inner wall of the reactor.

[0041] In this embodiment, the lifting mechanism includes a pair of lifting cylinders 7 symmetrically distributed on the left and right, the lifting cylinders 7 are vertically arranged above the synthesis kettle body 1, and the telescopic ends of the lifting cylinders 7 are connected to the vertically arranged piston rods 6, which penetrate the top of the synthesis kettle body 1 downward and are fixedly connected to the top of the steam injection pipe 2. Further, in order to facilitate the control of the lifting speed, the lifting mechanism also includes a bidirectional variable frequency motor 9, which is electrically connected to the pair of lifting cylinders 7, and the bidirectional variable frequency motor is used to control the lifting cylinders.

[0042] In this embodiment, a speed sensor 8 is installed on the top of the piston rod 6 , and the speed sensor 8 is used to detect the moving speed of the piston rod 6 .

[0043] In this embodiment, a steam input pipe 25 is provided at the top of the steam injection pipe 2, and the steam input pipe 25 is connected to the steam generating device through a delivery hose 14 that passes through the top of the synthesis reactor body 1. It should be noted that the delivery hose is a pressure-resistant and temperature-resistant rubber hose with a sufficient length. The pressure-resistant and temperature-resistant rubber flexible hose of sufficient length can enter and exit the synthesis reactor as the steam injection pipe rises and falls in the reactor.

[0044] In this embodiment, the steam generating device comprises a steam tank 15 arranged beside the synthesis reactor body 1, and an arc-shaped electric heating block 16 is fixed to the outer wall of the steam tank 15, and the electric heating block 16 is used to heat the water in the steam tank 15 to generate steam. The upper end side wall of the steam tank 15 is provided with a steam output port for outputting steam, and the steam output port is connected to a first steam solenoid valve 22 and a second steam solenoid valve 23 arranged in parallel, and the first steam solenoid valve 22 is connected to a delivery hose 24 to deliver steam to the steam injection pipe through the delivery hose; the second steam solenoid valve 23 is connected to the synthesis reactor steam inlet valve 24 on the lower end side wall of the synthesis reactor body 1 through a steam delivery pipe, so as to deliver steam to the inside of the synthesis reactor body.

[0045] In this embodiment, the steam tank is made of high-quality stainless steel and is manufactured into a vertical cylindrical shape with upper and lower elliptical pressure-bearing heads according to the pressure vessel regulations. The top of the steam tank 15 is provided with a temperature sensor 18, a radar wave velocity sensor 19, a safety valve 20 and a pure water inlet solenoid valve 21; the lower end side of the steam tank 15 is provided with a manhole 17, which is used for manual entry into the interior for inspection and maintenance.

[0046] In this embodiment, the bottom discharge port of the synthesis reactor body 1 is connected to a drain pipe and a discharge pipe through a three-way joint. The drain pipe is convenient for discharge after cleaning, and the discharge pipe is convenient for normal discharge after the synthesis reactor is working. For convenient control, a drain solenoid valve 27 is installed on the drain pipe, and a discharge solenoid valve 26 is installed on the discharge pipe.

[0047] In this embodiment, a sulfuric acid valve 11 , a water inlet valve 12 and a sodium silicate solution valve 13 are disposed on the top of the synthesis reactor body 1 .

[0048] In this embodiment, a control module is also included. The control module is pre-set with: the number of up and down reciprocating movements, frequency, vertical lifting range, speed of the steam injection pipe 2, scraper blade 3, and cleaning brush 4, as well as automatic control programs such as steam temperature, steam pressure, and pure water level. The input end of the control module is electrically connected to the output ends of the temperature sensor 18, pressure sensor, speed sensor 8, radar wave water level sensor 19, etc., and the output end of the control module is electrically connected to the input ends of the bidirectional frequency conversion motor 9, electric heating block 16, first steam solenoid valve 22, second steam solenoid valve 23, pure water inlet solenoid valve 21, etc. During operation, the alkali scale adhered to the inner wall of the synthesis reactor is thoroughly cleaned by spraying high-temperature steam in combination with a scraper blade 3 and a cleaning brush 4. When encountering stubborn alkali scale with high adhesion, the piston rod encounters greater resistance, resulting in a decrease in the descent speed. When it drops to the low speed setting value, the control module automatically controls the bidirectional frequency conversion motor to increase the output to remove the stubborn alkali scale with high adhesion; after the stubborn alkali scale with high adhesion is removed, the piston rod descends at an increased speed, and the control module automatically controls to reduce the output of the bidirectional frequency conversion motor to fully ensure the efficient operation of the lifting cylinder; when the piston rod descends to the set vertical low position, the bidirectional frequency conversion motor automatically reverses to move the piston rod in a straight upward direction, and stops when it rises to the set value.

[0049] Specific implementation process:

[0050] 1) The control module is pre-set to include: the number of reciprocating times, frequency, vertical lifting range, speed of the steam injection pipe 2, scraper blade 3, cleaning brush 4, as well as automatic control programs such as steam temperature, steam pressure, and pure water level;

[0051] 2) After the discharging of the silicon dioxide slurry in the synthesis reactor body 1 is completed and the reactor body is in an empty state, the discharging solenoid valve 26 at the bottom of the synthesis reactor body is closed;

[0052] 3) Open the drainage solenoid valve 27 at the bottom of the synthesis reactor body 1;

[0053] 4) Turn on the electric heating block 16 of the steam tank 15 to heat the pure water in the steam tank 15 to the set pressure and temperature;

[0054] 5) The water level in the steam tank 15 is detected online in real time through the radar liquid level sensor 19. When the water level drops to a low setting value, the pure water solenoid valve 21 is automatically opened to replenish pure water. When the water level rises to a high setting value, the pure water solenoid valve 21 is closed;

[0055] 6) The second steam solenoid valve 23 of the steam tank 15 is opened, and the high-pressure and high-temperature steam is sprayed around the inner wall of the synthesis reactor body 1 through the second steam valve 23, the delivery hose 14, and the spray nozzle 5, so as to soften, dissolve and flush the alkali scale adhered to the inner wall of the synthesis reactor body 1 at high temperature;

[0056] 7) Turn on the bidirectional frequency conversion motor 9, and drive the steam injection pipe 2 and the matching scraper 3 and the cleaning brush 4 to move vertically downward through the piston rod, and perform high-temperature steam injection, scraping with the scraper 3 and sweeping with the cleaning brush 4 on the alkali scale adhered to the inner wall of the synthesis reactor body 1, and the speed sensor 8 detects the movement speed of the vertically downward piston rod 6;

[0057] 8) When encountering stubborn alkaline scale with high viscosity, the piston rod 6 encounters greater resistance, resulting in a decrease in the descending speed. When it drops to the low speed setting value, the control module automatically controls the variable frequency motor 9 to increase the output to remove the stubborn alkaline scale with high viscosity;

[0058] 9) After the stubborn alkaline scale with high adhesion is removed, the descending speed of the piston rod 6 increases, and the control module automatically controls to reduce the output of the bidirectional frequency conversion motor 9, fully ensuring the efficient operation of the piston rod;

[0059] 10) When the piston rod 6 drops to the set vertical low position, the bidirectional frequency conversion motor 9 automatically reverses and moves the piston rod 6 vertically upward, and stops when it rises to the set value;

[0060] 11) According to the control program pre-set by the control module, the steam injection pipe, scraper and cleaning brush inside the synthesis reactor automatically perform multiple reciprocating cleaning of the alkali scale adhered to the inner wall of the synthesis reactor by steam injection, scraping and brushing;

[0061] 12) Use steam jet, brushing and scraping to clean the fallen alkali scale, and discharge it through the drainage solenoid valve 27 at the bottom of the synthesis reactor. For larger pieces of alkali scale, the stirring component 10 can be turned on to crush them and then discharge them;

[0062] 13) After cleaning, close the electric heating block 16 of the steam tank 15, the pure water solenoid valve 21, and the second steam solenoid valve 23;

[0063] 14) After the alkali scale and water at the bottom of the synthesis reactor are drained, the stirring assembly 10 and the drain solenoid valve 27 are closed;

[0064] 15) Turn on the bidirectional variable frequency motor 9 to raise the steam injection pipe 2, the scraper blade 3 and the cleaning brush 4 to their initial positions;

[0065] 16) The cleaning work is completed and wait for the next cleaning.

[0066] If the present invention discloses or involves components or structures that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by one-piece molding using a casting process) (except where it is obviously impossible to use an one-piece molding process).

[0067] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in the above utility model include states or shapes that are approximate, similar or close thereto.

[0068] Any component provided by the utility model can be assembled from multiple separate components, or can be a separate component manufactured by an integrated molding process.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A device for cleaning the inner wall of a silicon dioxide synthesis reactor by arc lifting and shoveling combined with steam, comprising a synthesis reactor body, characterized in that: A circular steam injection pipe is horizontally arranged inside the synthesis reactor body, and the steam injection pipe is driven to rise and fall vertically by a lifting mechanism. A plurality of injection nozzles are distributed on the outer peripheral side of the steam injection pipe. A circular scraper is fixed to the bottom of the steam injection pipe, and the blade of the scraper is located on the peripheral side of the lower end. A circular cleaning brush is sleeved on the outer side of the upper end of the scraper, and the brush head of the cleaning brush is located on the peripheral side and contacts the inner side wall of the synthesis reactor body.

2. The inner wall cleaning device of a silicon dioxide synthesis reactor by circular arc lifting and steam scraping according to claim 1 is characterized in that: The plurality of injection nozzles are evenly distributed around the axis of the steam injection pipe in a circumferential manner, and the injection nozzles are arranged along the radial direction of the steam injection pipe.

3. The inner wall cleaning device of a silicon dioxide synthesis reactor by circular arc lifting and steam scraping according to claim 1 is characterized in that: The steam injection pipe, the scraper, the cleaning brush and the synthesis reactor body are coaxially distributed, and the steam injection pipe, the scraper and the cleaning brush are all composed of several sections spliced ​​together.

4. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by arc lifting and shoveling combined with steam according to claim 1, characterized in that: The blade of the scraper is inclined downward, and a gap is provided between the blade of the scraper and the inner side wall of the synthesis reactor body.

5. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by arc lifting and shoveling combined with steam according to claim 1, characterized in that: The lifting mechanism includes a pair of lifting cylinders symmetrically distributed on the left and right. The lifting cylinders are vertically arranged above the synthesis kettle body. The telescopic ends of the lifting cylinders are connected to vertically arranged piston rods. The piston rods penetrate downwardly through the top of the synthesis kettle body and are fixedly connected to the top of the steam injection pipe.

6. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by combining arc lifting and steam scraping according to claim 5, characterized in that: The lifting mechanism also includes a bidirectional variable frequency motor, and the bidirectional variable frequency motor is electrically connected to a pair of lifting cylinders.

7. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by arc lifting and steam scraping according to claim 1, characterized in that: A steam input pipe is arranged on the top of the steam injection pipe, and the steam input pipe is connected to the steam generating device through a delivery hose penetrating the top of the synthesis reactor body.

8. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by arc lifting and steam scraping according to claim 7 is characterized in that: The steam generating device comprises a steam tank arranged beside the synthesis kettle body, an arc-shaped electric heating block is fixed to the outer wall of the steam tank, a steam output port is arranged on the upper end side wall of the steam tank, and the steam output port is connected to a first steam solenoid valve and a second steam solenoid valve arranged in parallel, the first steam solenoid valve is connected to a delivery hose, and the second steam solenoid valve is connected to a synthesis kettle steam inlet valve on the lower end side wall of the synthesis kettle body through a steam delivery pipe.

9. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by combining arc lifting and steam scraping according to claim 8, characterized in that: The top of the steam tank is provided with a temperature sensor, a radar wave velocity sensor, a safety valve and a pure water inlet electromagnetic valve, and the lower end side of the steam tank is provided with a manhole.

10. The device for cleaning the inner wall of a silicon dioxide synthesis reactor by combining arc lifting and steam scraping according to claim 1, characterized in that: The bottom discharge port of the synthesis kettle body is connected to a drain pipe and a discharge pipe through a three-way joint, a drain solenoid valve is installed on the drain pipe, and a discharge solenoid valve is installed on the discharge pipe; a sulfuric acid valve, a water inlet valve and a sodium silicate solution valve are arranged on the top of the synthesis kettle body, and a stirring assembly is arranged inside the synthesis kettle body.

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