A cooling and washing system for a non-condensable gas constant flow sampling device of a pulse surge tank

Abstract

The utility model relates to a kind of cooling, washing system of non-condensable gas constant-flow sampling device of pulse buffer tank, including: cooling and washing mechanism, it includes tank body, water inlet pipe and drain pipe, tank body is equipped with air inlet pipe and air outlet pipe, the air outlet end of air inlet pipe is located in tank body;Air inlet pipe's air inlet end passes through tank body and is communicated with the sample gas pipeline of dissolution pulse buffer tank;Air outlet pipe is fixed on the upper portion of tank body;Atomizing nozzle is installed in the inner top portion of tank body, water inlet pipe passes through tank body and is communicated with atomizing nozzle;Drain pipe is set in the bottom of tank body, and is communicated with the inner bottom portion of tank body;Control mechanism, it includes controller, liquid level monitor and multiple solenoid valves, multiple solenoid valves are connected with controller electric signal, solenoid valve is installed on water inlet pipe and drain pipe;Liquid level monitor is connected with controller electric signal, and liquid level monitor is used to monitor the water level height in tank body.This scheme is used to reduce the temperature and impurity of sample gas flowing in dissolution pulse buffer tank.

Description

Technical Field

[0001] This utility model relates to the field of wet oxidation decarbonization and desulfurization technology, specifically to a cooling and washing system for a pulse buffer tank non-condensable gas constant flow sampling device. Background Technology

[0002] The leaching pulse buffer tank is a core pressure vessel in alumina production, used to temporarily store a mixture of high-temperature (263℃) and high-pressure (4-5MPa) slurry and non-condensable gas.

[0003] Wet oxidation decarbonization and desulfurization technology achieves simultaneous and efficient removal of carbon and sulfur by precisely injecting oxygen into the leaching slurry. The core of this technology's industrialization lies in the precise detection of oxygen concentration in the non-condensable gas from the pulse buffer tank. The accuracy of this detection directly determines the effectiveness of oxygen injection control, thus affecting carbon and sulfur removal efficiency and production stability; it is the "core hub" of the technology system's efficient operation. However, the non-condensable gas discharged from the leaching pulse buffer tank initially presents a high temperature of 263℃, a high pressure of 4-5 MPa, and a concentration of 16 mg / Nm³. 3 Particulate matter and highly alkaline droplets (pH=11) can cause equipment damage and data drift if directly introduced into the analyzer or downstream cryogenic equipment. Therefore, there is an urgent need for a cooling and washing device for oxygen sampling from the dissolution pulse buffer tank. Utility Model Content

[0004] The present invention aims to provide a cooling and washing system for a pulse buffer tank non-condensable gas constant flow sampling device, so as to reduce the temperature and impurities of the sample gas flowing out of the pulse buffer tank.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a cooling and washing system for a pulse buffer tank non-condensable gas constant flow sampling device, comprising: A cooling and washing mechanism includes a tank, an inlet pipe, and a drain pipe. The tank contains cooling water and has an inlet pipe and an outlet pipe. The outlet end of the inlet pipe is located inside the tank and extends downward to the bottom of the tank. The inlet end of the inlet pipe passes through the tank and connects to the sample gas pipeline of the dissolution pulse buffer tank. The outlet pipe is fixed to the upper part of the tank and is used to discharge the sample gas after cooling and washing. An atomizing nozzle is installed at the top inner part of the tank, and the inlet pipe passes through the tank and connects to the atomizing nozzle. The drain pipe is located at the bottom of the tank and connects to the bottom inner part of the tank. The control mechanism includes a controller, a liquid level monitor, and multiple solenoid valves. The multiple solenoid valves are electrically connected to the controller. The solenoid valves are installed on the inlet pipe and the outlet pipe, and there is a one-to-one correspondence between the solenoid valves and the inlet pipe and the outlet pipe. The liquid level monitor is electrically connected to the controller and is used to monitor the water level in the tank.

[0006] Preferably, as an improvement, the bottom of the tank is connected to a drain pipe, and a solenoid valve is installed on the drain pipe. The solenoid valve is electrically connected to the controller.

[0007] Preferably, as an improvement, the level monitor uses a differential pressure transmitter.

[0008] Preferably, as an improvement, the controller is a PLC controller.

[0009] Preferably, as an improvement, the cooling water level in the tank is in the range of 500~1000mm.

[0010] Preferably, as an improvement, it also includes a temperature monitoring mechanism, which includes a pneumatic switch valve and a temperature transmitter. Both the pneumatic switch valve and the temperature transmitter are electrically connected to the controller. The pneumatic switch valve is installed on the inlet pipe to close the inlet pipe, and the temperature transmitter is installed on the outlet pipe to monitor the temperature of the sample gas after cooling and washing.

[0011] The principle and advantages of this scheme are as follows: In practical application, the inlet pipe is connected to the dissolution pulse buffer tank. The 263℃, 4-5MPa high-pressure sample gas discharged from the dissolution pulse buffer tank is transported to the interior of the cooling and washing mechanism through the inlet pipe. The outlet end of the inlet pipe extends to the bottom of the tank, allowing the sample gas to directly enter the pre-stored cooling water inside. At this time, the high temperature in the sample gas is rapidly reduced through direct contact with the cooling water, while the 16mg / Nm³ of the sample gas... 3 Particulate matter is intercepted by cooling water, and highly alkaline droplets are neutralized or dissolved by the water, completing the initial cooling and impurity removal.

[0012] Meanwhile, the controller monitors the water level in the tank in real time via a level monitor. When the water level drops below the set value of 500mm, the controller sends a signal to the solenoid valve on the inlet pipe, causing it to open. Cooling water then forms a fine mist through the atomizing nozzle at the top of the tank. This mist comes into contact with the sample gas escaping from the water, further reducing its temperature and washing away residual impurities. Simultaneously, it replenishes the water in the tank until the level monitor detects that the water level has returned to the set range, at which point the controller closes the inlet solenoid valve. At the same time, the solenoid valve on the drain pipe at the bottom of the tank opens periodically or as needed according to the controller's instructions, discharging wastewater containing impurities and maintaining the cleanliness of the cooling water. The solenoid valve on the drain pipe at the bottom of the tank also periodically discharges deposited particles under the controller's control, preventing pipe blockage.

[0013] The sample gas, after undergoing dual cooling and washing, is discharged from the outlet pipe at the top of the tank and enters subsequent analyzers or cryogenic equipment. During this process, the temperature transmitter of the temperature monitoring mechanism monitors the sample gas temperature in the outlet pipe in real time and transmits the data to the controller. If the sample gas temperature is detected to be higher than the set safety value, it indicates that the cooling effect has not met the standard. The controller will immediately send a signal to the pneumatic switch valve on the inlet pipe to close it, cutting off the sample gas delivery and preventing the high-temperature sample gas from damaging downstream equipment. After the tank cooling system returns to normal and the sample gas temperature drops to a safe range, the controller will then control the pneumatic switch valve to open and resume the sample gas delivery, ensuring the entire process is safe and stable.

[0014] 1. This solution employs a dual cooling mode—underwater direct jetting of the sample gas and top atomizing spray—to rapidly reduce the high-temperature sample gas (263℃) to a safe temperature for downstream equipment, preventing damage to the analyzer or cryogenic equipment due to high temperatures. Simultaneously, cooling water intercepts 16 mg / Nm³ of the sample gas. 3 The particulate matter is then neutralized by atomized water mist, and the strong alkaline droplets are washed in a double process to ensure the cleanliness of the sample gas, thus solving the problem of data drift at the source and providing a foundation for accurate oxygen concentration detection.

[0015] 2. Relying on the linkage between the liquid level monitor and the solenoid valve, the controller can adjust the cooling water level in real time (maintaining 500~1000mm) to avoid the cooling and washing failure caused by the water level being too low, or the sample gas being carried over by the water level being too high, thus ensuring stable treatment effect.

[0016] 3. The temperature transmitter monitors the sample gas temperature in real time. If the temperature exceeds the limit, the pneumatic switch valve will be triggered to cut off the sample gas, forming a safe closed loop of temperature monitoring, abnormal shutdown, and recovery restart, eliminating the risk of equipment damage. At the same time, the sewage pipe is regularly drained to prevent pipe blockage from affecting system operation.

[0017] 4. Clean and constant-temperature sample gas can ensure the accuracy of oxygen concentration detection, providing precise oxygen injection basis for "wet oxidation decarbonization and desulfurization technology", directly improving carbon and sulfur removal efficiency and breaking through the development bottleneck of high-carbon and sulfur bauxite. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cooling and washing system of a pulse buffer tank non-condensable gas constant flow sampling device according to this utility model.

[0019] The reference numerals in the accompanying drawings include: 1. Pneumatic switch valve; 2. Air inlet pipe; 3. Water inlet pipe; 4. Solenoid valve; 5. Drain pipe; 6. Tank body; 7. Sewage pipe; 8. Cooling water; 9. Liquid level monitor; 10. Air outlet pipe; 11. Temperature transmitter. Detailed Implementation

[0020] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1As shown: A cooling and washing system for a pulse buffer tank non-condensable gas constant flow sampling device includes: The cooling and washing mechanism includes a tank 6, an inlet pipe 3, and a drain pipe 5. The tank 6 is used to contain cooling water 8, and the liquid level of the cooling water 8 in the tank 6 is in the range of 500~1000mm. The tank 6 is equipped with an air inlet pipe 2 and an air outlet pipe 10. The air outlet end of the air inlet pipe 2 is located inside the tank 6 and extends downward to the bottom of the tank 6. The air inlet end of the air inlet pipe 2 passes through the tank 6 and is connected to the sample gas pipeline of the dissolution pulse buffer tank. The air outlet pipe 10 is fixed to the upper part of the tank 6 and is used to discharge the sample gas after cooling and washing. An atomizing nozzle is installed on the inner top of the tank 6, and the inlet pipe 3 passes through the tank 6 and is connected to the atomizing nozzle. The drain pipe 5 is located at the bottom of the tank 6 and is connected to the inner bottom of the tank 6. A sewage pipe 7 is connected to the bottom of the tank 6, and a solenoid valve 4 is installed on the sewage pipe 7. The solenoid valve 4 is electrically connected to the controller.

[0021] The control mechanism includes a controller (PLC controller), a level monitor 9 (differential pressure transmitter), and two solenoid valves 4. The two solenoid valves 4 are electrically connected to the controller. The solenoid valves 4 are installed on the inlet pipe 3 and the drain pipe 5, and there is a one-to-one correspondence between the solenoid valves 4 and the inlet pipe 3 and the drain pipe 5. The level monitor 9 is electrically connected to the controller and is used to monitor the water level in the tank 6.

[0022] The temperature monitoring mechanism includes a pneumatic switch valve 1 and a temperature transmitter 11. Both the pneumatic switch valve and the temperature transmitter 11 are electrically connected to the controller. The pneumatic switch valve is installed on the inlet pipe 2 to close the inlet pipe 2, and the temperature transmitter 11 is installed on the outlet pipe 10 to monitor the temperature of the sample gas after cooling and washing.

[0023] The specific implementation process is as follows: In practical applications, the inlet pipe 2 is connected to the dissolution pulse buffer tank. The high-pressure sample gas of 263℃ and 4-5MPa discharged from the dissolution pulse buffer tank is transported to the tank body 6 of the cooling and washing mechanism through the inlet pipe 2. The outlet end of the inlet pipe 2 extends to the bottom of the tank body 6, allowing the sample gas to directly enter the pre-stored cooling water 8 inside the tank. At this time, the high temperature in the sample gas is rapidly cooled through direct contact with the cooling water 8, while the sample gas contains 16mg / Nm³ of... 3 Particulate matter is intercepted by cooling water, and highly alkaline droplets are neutralized or dissolved by the water, completing the initial cooling and impurity removal.

[0024] Meanwhile, the controller monitors the water level in the tank in real time via the level monitor 9. When the water level is 500mm below the set value, the controller sends a signal to the solenoid valve 4 on the inlet pipe 3 to open it. The cooling water 8 then forms a fine mist through the atomizing nozzle at the top of the tank 6. The mist comes into contact with the sample gas escaping from the water, further reducing the sample gas temperature and washing away residual impurities. Simultaneously, it replenishes the water in the tank until the level monitor 9 detects that the water level has returned to the set range, at which point the controller closes the solenoid valve 4 on the inlet pipe 3. At the same time, the solenoid valve 4 on the drain pipe 5 at the bottom of the tank 6 opens periodically or as needed according to the controller's instructions to discharge wastewater containing impurities, maintaining the cleanliness of the cooling water 8. The solenoid valve 4 on the drain pipe 7 at the bottom of the tank 6 also periodically discharges deposited particles under the control of the controller, preventing pipe blockage.

[0025] The sample gas, after undergoing double cooling and washing, is discharged from the outlet pipe 10 at the top of the tank 6 and enters the subsequent analyzer or cryogenic equipment. During this process, the temperature transmitter 11 of the temperature monitoring mechanism monitors the sample gas temperature in the outlet pipe 10 in real time and transmits the data to the controller. If the sample gas temperature is detected to be higher than the set safety value, it indicates that the cooling effect has not met the standard. The controller will immediately send a signal to the pneumatic switch valve 1 on the inlet pipe 2 to close it, cutting off the sample gas delivery and preventing the high-temperature sample gas from damaging downstream equipment. After the cooling system inside the tank returns to normal and the sample gas temperature drops to a safe range, the controller will then control the pneumatic switch valve 1 to open, restoring the sample gas delivery and ensuring the safety and stability of the entire process.

[0026] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A cooling and washing system for a pulse buffer tank non-condensable gas constant flow sampling device, characterized in that, include: A cooling and washing mechanism includes a tank, an inlet pipe, and a drain pipe. The tank contains cooling water and has an inlet pipe and an outlet pipe. The outlet end of the inlet pipe is located inside the tank and extends downward to the bottom of the tank. The inlet end of the inlet pipe passes through the tank and connects to the sample gas pipeline of the dissolution pulse buffer tank. The outlet pipe is fixed to the upper part of the tank and is used to discharge the sample gas after cooling and washing. An atomizing nozzle is installed at the top inner part of the tank, and the inlet pipe passes through the tank and connects to the atomizing nozzle. The drain pipe is located at the bottom of the tank and connects to the bottom inner part of the tank. The control mechanism includes a controller, a liquid level monitor, and multiple solenoid valves. The multiple solenoid valves are electrically connected to the controller. The solenoid valves are installed on the inlet pipe and the outlet pipe, and there is a one-to-one correspondence between the solenoid valves and the inlet pipe and the outlet pipe. The liquid level monitor is electrically connected to the controller and is used to monitor the water level in the tank.

2. The cooling and washing system of the pulse buffer tank non-condensable gas constant flow sampling device according to claim 1, characterized in that: The bottom of the tank is connected to a drain pipe, and a solenoid valve is installed on the drain pipe. The solenoid valve is electrically connected to the controller.

3. The cooling and washing system of the pulse buffer tank non-condensable gas constant flow sampling device according to claim 2, characterized in that: The liquid level monitor uses a differential pressure transmitter.

4. The cooling and washing system of the pulse buffer tank non-condensable gas constant flow sampling device according to claim 3, characterized in that: The controller is a PLC controller.

5. The cooling and washing system of the pulse buffer tank non-condensable gas constant flow sampling device according to claim 4, characterized in that: The cooling water level in the tank is in the range of 500~1000mm.

6. The cooling and washing system of the pulse buffer tank non-condensable gas constant flow sampling device according to claim 5, characterized in that: It also includes a temperature monitoring mechanism, which includes a pneumatic switch valve and a temperature transmitter. Both the pneumatic switch valve and the temperature transmitter are electrically connected to the controller. The pneumatic switch valve is installed on the inlet pipe to close the inlet pipe, and the temperature transmitter is installed on the outlet pipe to monitor the temperature of the sample gas after cooling and washing.

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