Automatic cooling water feeding system for furnace barrel of reduction furnace

Abstract

The utility model provides an automatic cooling water feeding system for a furnace barrel of a reduction furnace, and relates to the technical field of reduction furnaces. The device is applied to the reduction furnace, a furnace barrel jacket is arranged on the reduction furnace, a water inlet pipe and a water outlet pipe are communicated with the furnace barrel jacket, the water inlet pipe is communicated with a high-temperature water self-furnace barrel water feeding main pipe and a cold water self-shutdown furnace water feeding main pipe, and the water outlet pipe is communicated with a gas emptying pipeline. The water outlet pipe is provided with a furnace barrel water return pressure transmitter, and the tail end of the water outlet pipe is communicated with a high-temperature water furnace barrel water return main pipe and a cold water furnace shutdown water return main pipe. Water is automatically fed, and non-production time waste is reduced.

Description

Technical Field

[0001] This utility model relates to the field of reduction furnace technology, specifically to an automatic water supply system for cooling water in a reduction furnace cylinder. Background Technology

[0002] Since the improvement of the Siemens process for producing polysilicon, with the continuous increase in market demand, the demand for product output has been constantly increasing. As an intermittently operating production device, the means to increase polysilicon output, in addition to process control during operation, also rely on the control of non-production time. The shorter the non-production time of each reduction furnace, the more time can be used for polysilicon production each year.

[0003] In existing technologies, non-productive time in reduction furnaces is mainly generated during start-up and shutdown replacement, silicon core installation, and silicon rod disassembly. The start-up and shutdown replacement operation includes three steps: adding cold water to the furnace jacket, switching between hot and cold water, and connecting to the flash evaporation system. All of these steps are manually performed by operators according to operating procedures, requiring manual judgment of when the conditions for the next step are met before manually completing the water supply operation. This method is susceptible to subjective influencing factors such as personnel scheduling capabilities and varying operator skill levels, resulting in unavoidable waste of non-productive time throughout long production processes. Utility Model Content

[0004] The purpose of this invention is to develop an automatic water supply system for the cooling water of a reduction furnace cylinder that reduces waste of non-production time.

[0005] This utility model is achieved through the following technical solution:

[0006] An automatic water supply system for cooling water in a reduction furnace drum, applied to a reduction furnace.

[0007] A furnace tube jacket is installed on the reduction furnace;

[0008] The inlet and outlet water pipes are connected to the furnace tube jacket.

[0009] The water inlet pipe is connected to the main water supply pipe for high-temperature water from the furnace drum and the main water supply pipe for cold water from the furnace shutdown pipe.

[0010] The outlet pipe is connected to a gas venting pipe, and a furnace drum return water pressure transmitter is installed on the outlet pipe. The end of the outlet pipe is connected to a high-temperature water return water main pipe to the furnace drum and a cold water return water main pipe to the shutdown return water main pipe.

[0011] The high-temperature water to the furnace drum return water main is equipped with a furnace drum return water shut-off valve, and the cold water to the shutdown return water main is equipped with a shutdown return water shut-off valve.

[0012] The outlet pipe is also equipped with a furnace drum return water temperature transmitter, a furnace drum return water flow transmitter, and a furnace drum return water regulating valve, which are arranged in sequence.

[0013] Optionally, the water inlet pipe is connected to the lower part of the furnace barrel jacket, and the water outlet pipe is connected to the top of the furnace barrel jacket.

[0014] Optionally, the gas venting pipe is equipped with a furnace exhaust shut-off valve.

[0015] Optionally, the gas venting pipeline is further equipped with a furnace exhaust pipeline temperature transmitter, and the furnace exhaust pipeline temperature transmitter and the furnace exhaust shut-off valve are arranged in sequence.

[0016] Optionally, the temperature transmitter in the furnace exhaust pipe can be replaced with a capacitive sensor or a conductivity sensor.

[0017] Optionally, the high-temperature water supply main pipe from the furnace drum is equipped with a furnace drum water supply shut-off valve, and the cold water supply main pipe from the furnace shutdown water supply is equipped with a furnace shutdown water supply regulating valve.

[0018] Optionally, the connection point between the gas venting pipe and the water outlet pipe is located on the water outlet pipe before the furnace drum return water temperature transmitter.

[0019] The beneficial effects of this utility model are:

[0020] By coordinating sensors and an automatic control program, the system automatically determines when to perform water filling. It monitors water filling time, pipeline pressure, and temperature to determine whether the reduction furnace has completed water filling. Similarly, the program determines when to perform hot and cold water switching. By monitoring changes in the return water temperature of the furnace jacket, it determines whether the return water meets the conditions for integration into the flash evaporation system. All valve actions are completed by the program, making the operation process smoother. This avoids the waste of non-productive time caused by insufficient human operation skills or experience, which may lead to failure to perform the next operation in time when the conditions are met. It also reduces the labor intensity of operators performing repetitive operations for a long time, allowing operators to focus more on the system status and improving emergency response capabilities. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a structural diagram of the present utility model.

[0023] Reference numerals in the attached diagram: 1. Furnace drum return water temperature transmitter; 2. Furnace drum return water flow transmitter; 3. Furnace drum return water pressure transmitter; 4. Furnace drum return water regulating valve; 5. Shutdown return water shut-off valve; 6. Furnace drum return water shut-off valve; 7. Furnace drum water supply shut-off valve; 8. Shutdown water supply regulating valve; 9. Furnace drum exhaust shut-off valve; 10. Furnace drum exhaust pipe temperature transmitter. Detailed Implementation

[0024] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0027] like Figure 1 As shown, this utility model discloses an automatic water supply system for cooling water in a reduction furnace drum, which is applied to a reduction furnace. The reduction furnace is equipped with a drum jacket, with a water inlet pipe connected to the lower part of the drum jacket and a water outlet pipe connected to the top of the drum jacket.

[0028] The inlet pipe is connected to the main water supply pipe for high-temperature water from the furnace drum and the main water supply pipe for cold water from the furnace shutdown pipe. The main water supply pipe for high-temperature water from the furnace drum is equipped with a furnace drum water supply shut-off valve 7, and the main water supply pipe for cold water from the furnace shutdown pipe is equipped with a furnace shutdown water supply regulating valve 8.

[0029] The outlet pipe is connected to a gas venting pipe, which discharges the air and cold water in the furnace jacket during the cooling process. The air and cold water go to the shutdown water system. The gas venting pipe is equipped with a furnace exhaust pipe temperature transmitter 10 and a furnace exhaust shut-off valve 9 in sequence.

[0030] After the gas venting pipeline, the outlet pipe is sequentially equipped with a furnace drum return water temperature transmitter 1, a furnace drum return water flow transmitter 2, a furnace drum return water pressure transmitter 3, and a furnace drum return water regulating valve 4. The end of the outlet pipe is also connected to a high-temperature water to the furnace drum return water main pipe and a cold water to the shutdown return water main pipe. A furnace drum return water shut-off valve 6 is installed on the high-temperature water to the furnace drum return water main pipe, and a shutdown return water shut-off valve 5 is installed on the cold water to the shutdown return water main pipe.

[0031] When the reduction furnace needs to be started and filled with water, the program initiates the water filling operation, automatically opening the furnace shell exhaust shut-off valve 9 and the shutdown water filling regulating valve 8. Cold water is then added to the furnace shell jacket, and air inside the jacket is expelled through the gas venting pipe. The program then checks if the execution time of this step meets the water filling and exhaust time requirements, and if the furnace shell return water pressure transmitter 3 detects that the pressure in the outlet pipe reaches the required cold water pressure. Once both conditions are met, the program determines that the reduction furnace shell jacket is full of cold water and automatically closes the furnace shell exhaust shut-off valve 9 and the shutdown water filling regulating valve 8. In addition, due to the temperature difference between the cold water and the gas venting pipe, the furnace shell exhaust pipe temperature transmitter 10 on the gas venting pipe monitors whether the temperature inside the gas venting pipe changes. This can also be used as a basis for determining whether the furnace shell jacket is full of cold water. However, this method is suitable for environments with higher temperatures and is applicable to scenarios where there is a large temperature difference between the inside of the gas venting pipe and the cold water. When the temperature difference between the inside of the gas exhaust pipe and the cold water is small, the temperature transmitter 10 of the furnace exhaust pipe can also be replaced with a capacitive sensor or a conductivity sensor to monitor moisture.

[0032] Then, open the shutdown return water shut-off valve 5 and the furnace drum water shut-off valve 7, and slowly open the furnace drum return water regulating valve 4. The hot water entering the furnace drum jacket water supply pipe drives the cold water in the furnace drum jacket to the shutdown water system. During this process, the temperature in the furnace drum jacket and the furnace drum return water pipe begins to rise. When the program detects that the temperature returned by the furnace drum return water temperature transmitter 1 meets the set conditions, the program automatically closes the furnace drum return water regulating valve 4 and closes the shutdown return water shut-off valve 5. The furnace drum return water shut-off valve 6 is opened to incorporate the return water from the reduction furnace drum jacket into the flash evaporation system. Then, the furnace drum return water regulating valve 4 is slowly opened to switch the control loop between the furnace drum return water regulating valve 4 and the furnace drum return water flow transmitter 2 to PID automatic control mode.

[0033] This invention utilizes sensors and an automatic control program to automatically determine when to perform a water filling operation. It monitors the water filling time, pipeline pressure, and temperature to determine if the reduction furnace has completed water filling. Similarly, the program determines when to perform a hot and cold water switching operation. By monitoring changes in the return water temperature of the furnace jacket, it determines whether the return water meets the conditions for integration into the flash evaporation system. All valve actions are completed by the program, resulting in a smoother operation process. This avoids the waste of non-productive time caused by insufficient human skill or experience leading to delayed further operations even when conditions are met. It also reduces the workload of operators performing repetitive tasks for extended periods, allowing them to focus more on system status and improving emergency response capabilities.

[0034] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. An automatic water supply system for cooling water in a reduction furnace cylinder, characterized in that, Used in reduction furnaces A furnace tube jacket is installed on the reduction furnace; The inlet and outlet water pipes are connected to the furnace tube jacket. The water inlet pipe is connected to the main water supply pipe for high-temperature water from the furnace drum and the main water supply pipe for cold water from the furnace shutdown pipe. The outlet pipe is connected to a gas venting pipe, and a furnace drum return water pressure transmitter is installed on the outlet pipe. The end of the outlet pipe is connected to a high-temperature water return water main pipe to the furnace drum and a cold water return water main pipe to the shutdown return water main pipe. The high-temperature water to the furnace drum return water main is equipped with a furnace drum return water shut-off valve, and the cold water to the shutdown return water main is equipped with a shutdown return water shut-off valve. The outlet pipe is also equipped with a furnace drum return water temperature transmitter, a furnace drum return water flow transmitter, and a furnace drum return water regulating valve, which are arranged in sequence.

2. The automatic water supply system for cooling water in the reduction furnace cylinder according to claim 1, characterized in that, The water inlet pipe is connected to the lower part of the furnace barrel jacket, and the water outlet pipe is connected to the top of the furnace barrel jacket.

3. The automatic water supply system for cooling water in the reduction furnace cylinder according to claim 1, characterized in that, The gas venting pipeline is equipped with a furnace exhaust shut-off valve.

4. The automatic water supply system for cooling water in the reduction furnace cylinder according to claim 3, characterized in that, The gas venting pipeline is also equipped with a furnace exhaust pipeline temperature transmitter, and the furnace exhaust pipeline temperature transmitter and the furnace exhaust shut-off valve are arranged in sequence.

5. The automatic water supply system for cooling water in the reduction furnace cylinder according to claim 4, characterized in that, The temperature transmitter in the furnace exhaust pipe can be replaced with a capacitive sensor or a conductivity sensor.

6. The automatic water supply system for cooling water in the reduction furnace cylinder according to claim 1, characterized in that, The high-temperature water supply main pipe from the furnace drum is equipped with a furnace drum water supply shut-off valve, and the cold water supply main pipe from the furnace shutdown water supply main pipe is equipped with a furnace shutdown water supply regulating valve.

7. The automatic water supply system for cooling water in the reduction furnace cylinder according to claim 1, characterized in that, The connection point between the gas venting pipe and the water outlet pipe is located on the water outlet pipe before the furnace drum return water temperature transmitter.

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