Gas-liquid channeling prevention device of furnace barrel cleaning machine

Abstract

The utility model discloses a gas-liquid channeling prevention device of a furnace barrel cleaning machine, which belongs to the technical field of polycrystalline silicon production equipment and comprises a buffer tank connected onto an instrument gas conveying pipeline of the furnace barrel cleaning machine and an exhaust mechanism arranged on the buffer tank, a gas inlet end of the buffer tank is connected with an instrument gas source, and a gas outlet end of the buffer tank is connected with a gas outlet of the furnace barrel cleaning machine. The water inlet end of the buffer tank is connected to an ejector at the front end of the furnace barrel cleaning machine through a pipeline; the exhaust mechanism comprises a pressure monitor and an emptying valve, the pressure monitor and the emptying valve are both connected with the controller, the pressure monitor detects the air pressure in the buffer tank and sends a detection signal to the controller, and the controller opens the emptying valve to perform emptying when the pressure monitored by the pressure monitor exceeds a threshold value. According to the utility model, the instrument gas conveying pipeline is internally provided with the anti-channeling device, so that the influence of high-pressure cleaning liquid which flows backwards on an instrument gas system and a furnace barrel cleaning system can be avoided, and the normal operation of production is ensured.

Description

Technical Field

[0001] The utility model relates to furnace drum cleaning equipment, in particular to a gas-liquid mutual interference prevention device for a furnace drum cleaning machine. Background Art

[0002] The reduction furnace is the main equipment for polysilicon production and consists of two major parts: a furnace barrel and a chassis. During the polysilicon production process, in order to meet the purity and cleanliness requirements of polysilicon extraction and production, it is necessary to clean the residues and dirt in the polysilicon reduction furnace. Any particulate impurities and grease substances remaining in the furnace will affect product quality. Patent document CN213079443U in the prior art discloses a cleaning system for a polysilicon reduction furnace. The cleaning system mainly consists of a cleaning base and a desalted water unit, a high-purity water unit, and a hot air unit arranged in parallel. The cleaning base is used to place the furnace barrel of the reduction furnace. An air duct and an injector are provided on the cleaning base. The desalted water unit is used to provide desalted water to the injector for pre-cleaning of the furnace body. The high-purity water unit is used to provide a high-pressure water flow to the injector for flushing the furnace body, and the hot air unit is used to provide hot air to the air duct for drying the furnace body.

[0003] When the ejector in the aforementioned patent is operating, it requires access to instrument air to drive the ejector to rotate and clean. Both the instrument air and high-pressure water are introduced from the bottom of the ejector. Under normal conditions, the wastewater after cleaning will be discharged along the wall of the furnace barrel through an external sewer pipe. However, during the actual operation of the cleaning system for one year, the diaphragm at the connection between the ejector and the instrument air and high-pressure water pipelines has repeatedly broken, causing the 15MPa high-pressure furnace barrel cleaning fluid to flow back into the 0.7MPa instrument air system. As a result, the pneumatic control valve and pneumatic regulating valve connected to the instrument air system pipeline were damaged and unusable, causing the furnace barrel cleaning system to be paralyzed. Workers had to frequently carry out maintenance, resulting in long downtime, high production costs, and serious impact on normal production operations. Utility Model Content

[0004] The utility model aims to solve the problem in the prior art that the cleaning liquid backflows into the instrument gas system due to frequent damage to the diaphragm of the furnace drum cleaning machine, affecting the normal operation of production. A furnace drum cleaning machine anti-gas-liquid mutual crosstalk device is proposed, which can effectively solve the problem that the furnace drum cleaning liquid backflows into the instrument gas system and causes the instrument gas system to be paralyzed, thereby ensuring the normal operation of production.

[0005] In order to achieve the above-mentioned utility model purpose, the technical solution of the utility model is as follows:

[0006] A device for preventing gas-liquid cross-talk in a furnace cleaning machine is characterized in that it includes a buffer tank connected to the instrument gas delivery pipeline of the furnace cleaning machine and an exhaust mechanism arranged on the buffer tank, the air inlet end of the buffer tank is connected to the instrument gas source, and the water inlet end of the buffer tank is connected to the ejector at the front end of the furnace cleaning machine through a pipeline; the exhaust mechanism includes a pressure monitor and a drain valve, and the pressure monitor and the drain valve are both connected to a controller, the pressure monitor detects the air pressure in the buffer tank and sends the detection signal to the controller, and the controller opens the drain valve to implement draining when the monitoring pressure of the pressure monitor exceeds a threshold.

[0007] Furthermore, the buffer tank is also provided with a drainage mechanism, which includes a drainage pipe and a sewage valve connected to the drainage pipe. The sewage valve is connected to the controller to open and discharge sewage at a fixed time.

[0008] Furthermore, a filter is provided on the air inlet pipeline of the buffer tank for filtering out residual water and oil in the instrument gas.

[0009] Furthermore, a filter screen is provided in the buffer tank, and the filter screen is used to filter the residue in the high-pressure cleaning fluid that flows back into the buffer tank.

[0010] Furthermore, a control valve is provided on the pipeline connecting the buffer tank to the furnace cleaning machine, and the control valve is used to control the on-off of the instrument gas delivery pipeline.

[0011] Furthermore, the pressure monitor and the drain valve are arranged on the top of the buffer tank.

[0012] Furthermore, the drainage pipe is connected to the bottom of the buffer tank.

[0013] The working principle of this utility model is as follows:

[0014] Under normal operating conditions, the control valve is open, and the instrument air enters the filter through the delivery pipeline to filter out a small amount of water and oil. The filtered instrument air passes through the buffer tank and enters the ejector at the front end of the cleaning machine to drive it to rotate. At the same time, high-pressure water is normally delivered to the ejector.

[0015] When the diaphragm at the connection between the ejector and the instrument air and high-pressure water pipelines is damaged, the high-pressure cleaning fluid flows back into the buffer tank connected to the low-pressure instrument air delivery pipeline; after the residue carried in it is intercepted by the filter, the remaining water is stored in the buffer tank. When the pressure monitor detects that the pressure in the buffer tank reaches the set threshold, the controller controls the drain valve to open and empty the buffer tank; the controller controls the drain valve to open at a regular interval to discharge the backflow cleaning fluid in the buffer tank.

[0016] In summary, the utility model has the following advantages:

[0017] 1. The utility model provides a buffer tank on the instrument gas delivery pipeline so that the high-pressure cleaning liquid flowing back into the delivery pipeline can be temporarily stored in the buffer tank, preventing it from entering the instrument gas system and damaging the pneumatic control valve, thus avoiding paralysis of the cleaning system. The exhaust mechanism on the buffer tank can be emptied in time to stabilize the gas pressure in the buffer tank;

[0018] 2. The buffer tank of the present invention is also provided with a drainage pipe and a drain valve, which is connected to the controller and can be opened and drained at a fixed time;

[0019] 3. The utility model provides a filter on the air inlet pipe of the buffer tank to remove residual water and oil in the instrument gas to ensure the quality of the instrument gas;

[0020] 4. The utility model also provides a filter in the buffer tank for filtering the residue carried by the high-pressure cleaning fluid to prevent clogging of the drainage pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of the gas-liquid crosstalk prevention device of the utility model;

[0022] Figure 2 This is a schematic diagram of the installation position of the gas-liquid mutual crosstalk prevention device of the utility model in the cleaning system;

[0023] In the picture:

[0024] 1. Buffer tank, 2. Pressure monitor, 3. Drain valve, 4. Filter, 5. Filter, 6. Control valve, 7. Drain valve, 8. Drain pipe, 9. Ejector, 10. Gas-liquid cross-talk prevention device. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] In the description of this utility model, it should be noted that the terms "upper," "vertical," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0029] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0030] Example 1

[0031] As the most basic implementation method of the present utility model, this embodiment proposes a device for preventing gas-liquid crosstalk in a furnace drum cleaning machine, such as Figure 2 As shown, the gas-liquid mutual crosstalk prevention device 10 is arranged on the conveying pipeline of the instrument gas connected to the furnace drum cleaning machine.

[0032] like Figure 1 The figure shows the structure of the gas-liquid crosstalk prevention device 10 of the present invention. It includes a buffer tank 1 connected to the instrument air delivery pipeline of the furnace drum cleaning machine and an exhaust mechanism provided on the buffer tank 1. The air inlet of the buffer tank 1 is connected to the instrument air source, and the water inlet of the buffer tank 1 is connected to the sprinkler at the front end of the furnace drum cleaning machine. The exhaust mechanism includes a pressure monitor 2 and a drain valve 3. Both the pressure monitor 2 and the drain valve 3 are connected to a controller for interlocking control. The pressure monitor 2 is used to detect the air pressure in the buffer tank 1 and send the detection signal to the controller. The drain valve 3 is used to open and drain the air when the monitoring pressure of the pressure monitor 2 exceeds a threshold.

[0033] The utility model provides a buffer tank 1 on the instrument gas delivery pipeline, so that the high-pressure cleaning liquid that flows back into the delivery pipeline can be temporarily stored in the buffer tank 1, and will not enter the instrument gas system to damage the pneumatic control valve 6, thereby avoiding paralysis of the cleaning system. The exhaust mechanism on the buffer tank 1 can be emptied in time to stabilize the gas pressure in the buffer tank 1.

[0034] Example 2

[0035] As a preferred embodiment of the present invention, this embodiment proposes a device for preventing gas-liquid crosstalk in a furnace drum cleaning machine, such as Figure 1 As shown, the system comprises a buffer tank 1 connected to the instrument gas delivery pipeline and an exhaust mechanism mounted on the buffer tank 1. The exhaust mechanism includes a pressure monitor 2 and a drain valve 3. Both the pressure monitor 2 and the drain valve 3 are connected to a controller for coordinated control. The pressure monitor 2 detects the air pressure in the buffer tank 1 and sends a detection signal to the controller. The controller opens the drain valve 3 to empty the gas when the pressure monitored by the pressure monitor 2 exceeds a threshold.

[0036] Furthermore, the buffer tank 1 is provided with a drainage mechanism, which includes a drainage pipe 8 connected to the bottom of the buffer tank 1 and a drain valve 7 connected to the drainage pipe 8. The drain valve 7 is connected to the controller to open and drain the sewage at a fixed time.

[0037] Example 3

[0038] As the best implementation method of the present utility model, this embodiment proposes a device for preventing gas-liquid crosstalk in a furnace drum cleaning machine, such as Figure 1 As shown, it includes: a buffer tank 1 connected to the instrument gas transmission pipeline and an exhaust mechanism provided on the buffer tank 1. The exhaust mechanism includes a pressure monitor 2 and a drain valve 3. Both the pressure monitor 2 and the drain valve 3 are connected to a controller for linkage control. The pressure monitor 2 is used to detect the air pressure in the buffer tank 1 and send the detection signal to the controller. The drain valve 3 is used to open and implement the drain when the monitoring pressure of the pressure monitor 2 exceeds a threshold. Preferably, the drain valve 3 and the pressure monitor 2 are provided at the top of the buffer tank 1.

[0039] Furthermore, the buffer tank 1 is provided with a drainage mechanism, which includes a drainage pipe 8 connected to the bottom of the buffer tank 1 and a drain valve 7 connected to the drainage pipe 8. The drain valve 7 is connected to the controller to open and drain the sewage at a fixed time.

[0040] Furthermore, a filter 5 is provided on the air inlet pipeline connecting the buffer tank 1 and the instrument air source. The filter 5 is used to filter residual water and oil in the instrument air to ensure the quality of the instrument air.

[0041] Furthermore, a filter screen 4 is provided in the buffer tank 1 , and the filter screen 4 is used to filter the residue carried in the high-pressure cleaning fluid to prevent the drainage pipe 8 from being blocked.

[0042] Furthermore, a control valve 6 is provided on the pipeline connecting the buffer tank 1 to the furnace cleaning machine. The control valve 6 is used to control the on-off of the instrument gas delivery pipeline.

[0043] The working principle of this utility model is as follows:

[0044] Under normal operating conditions, the control valve 6 is open, and the instrument gas enters the filter 5 through the delivery pipeline to filter out a small amount of water and oil. The filtered instrument gas passes through the buffer tank 1 and enters the ejector 9 at the front end of the cleaning machine to drive it to rotate. At the same time, high-pressure water is normally delivered to the ejector 9.

[0045] When the diaphragm at the connection between the ejector 9 and the instrument gas and high-pressure water pipelines is damaged, the high-pressure cleaning liquid flows back into the buffer tank 1 connected to the low-pressure instrument gas delivery pipeline; after the residue carried therein is intercepted by the filter 4, the remaining water is stored in the buffer tank 1. When the pressure monitor 2 detects that the pressure in the buffer tank 1 reaches the set threshold, the controller controls the drain valve 3 to open and empty the buffer tank 1; the controller controls the drain valve 7 to open at a regular interval to discharge the backflow cleaning liquid in the buffer tank 1.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention falls within the scope of protection of the present invention.

Claims

1. A device for preventing gas-liquid crosstalk in a furnace cleaning machine, characterized in that: The invention comprises a buffer tank (1) connected to an instrument gas delivery pipeline of a furnace drum cleaning machine and an exhaust mechanism arranged on the buffer tank (1), wherein the air inlet end of the buffer tank (1) is connected to an instrument gas source, and the water inlet end of the buffer tank (1) is connected to an ejector (9) at the front end of the furnace drum cleaning machine through a pipeline; the exhaust mechanism comprises a pressure monitor (2) and an exhaust valve (3), both of which are connected to a controller, the pressure monitor (2) detects the air pressure in the buffer tank (1) and sends a detection signal to the controller, and the controller opens the exhaust valve (3) to perform exhaust when the monitoring pressure of the pressure monitor (2) exceeds a threshold value.

2. The device for preventing gas-liquid crosstalk in a furnace drum cleaning machine according to claim 1, characterized in that: The buffer tank (1) is also provided with a drainage mechanism, which includes a drainage pipe (8) and a sewage valve (7) connected to the drainage pipe (8), and the sewage valve (7) is connected to a controller to open and discharge sewage at a fixed time.

3. The device for preventing gas-liquid crosstalk in a furnace drum cleaning machine according to claim 1, characterized in that: A filter (5) is provided on the air inlet pipeline of the buffer tank (1) for filtering out residual water and oil in the instrument air.

4. The device for preventing gas-liquid crosstalk in a furnace drum cleaning machine according to claim 1, characterized in that: A filter screen (4) is also provided in the buffer tank (1), and the filter screen (4) is used to filter residue in the high-pressure cleaning fluid that flows back into the buffer tank (1).

5. The device for preventing gas-liquid crosstalk in a furnace drum cleaning machine according to claim 1, characterized in that: A control valve (6) is provided on the pipeline connecting the buffer tank (1) to the furnace drum cleaning machine. The control valve (6) is used to control the on / off of the instrument gas delivery pipeline.

6. The device for preventing gas-liquid crosstalk in a furnace drum cleaning machine according to claim 1, characterized in that: The pressure monitor (2) and the drain valve (3) are arranged on the top of the buffer tank (1).

7. The device for preventing gas-liquid crosstalk in a furnace drum cleaning machine according to claim 2, characterized in that: The drainage pipe (8) is connected to the bottom of the buffer tank (1).

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