Method for obtaining ash sample of coal-crushing pressurized gasifier, sampling device and system

Abstract

The application discloses a method, sampling equipment and system for obtaining ash and slag samples of a crushed coal pressurized gasification furnace, and relates to the technical field of information collection. The method, sampling equipment and system for obtaining ash and slag samples of the crushed coal pressurized gasification furnace comprise a slag discharging device, a slag sampling device and a slag channel. The slag channel is used for receiving the ash and slag discharged by the slag discharging device. The slag discharging device and the slag sampling device are connected through a sample introduction pipe. The sample introduction pipe is used for introducing the falling ash and slag in the slag discharging device into the slag sampling device. The device controls the coordinated action of a turning plate, a water atomization system, a camera device and a stop valve through an automatic control device. Manual on-site sampling operation is not needed, and the health damage of the operating personnel caused by the high-temperature and high-dust sampling environment is avoided. Meanwhile, the sampling frequency can be improved, high-frequency and normalized sampling is realized, and the work load of manual sampling is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of information acquisition technology, and in particular to a method, sampling equipment and system for obtaining ash and slag samples from a pressurized coal gasification furnace. Background Technology

[0002] Coal, widely used in industrial activities, is an important fuel, and its combustion process directly affects its utilization rate and production costs. Taking coal gasification as an example, coal is the core raw material in this process; the more complete the coal combustion, the lower the production cost of coal gasification. Therefore, sampling and observing the ash and residue after coal combustion is an indispensable part of the entire coal gasification process.

[0003] Due to the relatively weak equipment research and development and manufacturing capabilities in the coal gasification industry, the sampling and observation of ash and slag have always been done manually. Relying on manual sampling and observation of ash and slag, that is, the entire process depends on or is mainly based on manual operation, has many drawbacks, such as being time-consuming and labor-intensive, inefficient, and resulting in harsh working conditions for workers. Summary of the Invention

[0004] To solve the above technical problems, the present invention is implemented through the following technical solution: A sampling device for obtaining ash samples in a pressurized coal gasification furnace includes a ash discharge device (202), a ash collection device (204), and a ash ditch (201). The ash ditch (201) is used to receive the ash discharged by the ash discharge device (202). The ash discharge device (202) and the ash collection device (204) are connected by a sample introduction pipe (209). The sample introduction pipe (209) is used to introduce the ash falling in the ash discharge device (202) into the ash collection device (204). The bottom of the slag collection device (204) is equipped with a sample discharge pipe (203), the bottom of which is connected to the slag ditch (201) or the slag discharge device (202). The inside of the slag collection device (204) is equipped with a flap (208), which is located between the sample discharge pipe (203) and the sample inlet pipe (209) and the connection point. The flap (208) is normally in the open state. The slag removal equipment (204) is also equipped with a water atomization system (205), which is located above the flap (208) and removes floating ash by spraying water mist. The top of the slag collection device (204) is equipped with a camera device (207) and an automatic control device (206). The camera device (207) is used to photograph the ash and slag collected on the flip plate (208), and the automatic control device (306) is used to control the sampling device.

[0005] Automatic control device 306 is also used to receive a notification from the sample discharge control system to start discharging samples, and to perform operations to control the sampling device after receiving the notification; With this design, the automatic control device 306 can perform sampling according to the notification from the sample discharge control system, thereby accurately determining the sample discharge time and performing sampling more efficiently.

[0006] Furthermore, a dust cover is provided on the surface of the camera device 207. The dust cover can be a double butterfly valve opening design or other opening designs.

[0007] Furthermore, a shut-off butterfly valve (210) is installed in the sample discharge pipe (203). The shut-off butterfly valve (210) is located below the flap (208). The shut-off butterfly valve (210) can prevent the backflow of ash and slag discharged from the sample discharge pipe (203).

[0008] Furthermore, the flap (208) is configured to flip, including a double-door flip mode or a single-door flip mode, which can satisfy the requirement of closing the flap when collecting samples and opening the flap when discharging samples.

[0009] Furthermore, the surface of the flap (208) is provided with a gravity sensor that can collect weight, for collecting the weight of the slag and ash on the top of the flap (208).

[0010] A method for obtaining ash samples from a pressurized coal gasification furnace, the specific implementation steps of which are as follows: When the ash is discharged through the ash discharge device (202), the automatic control device (206) controls the flap (208) to close. The flap (208) collects the ash discharged from the ash discharge device (202) and falls into the ash collection device (204) through the sample introduction pipe (209). The automatic control device (206) controls the water atomization system (205) to open, to process the ash and slag, and controls the water atomization system (205) to close after processing; it can quickly remove dust and debris, improve the efficiency of sampling and the sampling effect; The automatic control device (206) controls the camera device (207) to take pictures of the samples collected on the flip plate (208), and controls the flip plate (208) to open after the shooting is completed, so that the ash collected on the flip plate (208) is discharged from the slag collection device (204) through the sample discharge pipe (203). The ash and slag discharged from the slag extraction equipment (204) are discharged into the slag ditch (201) or slag discharge equipment (202) through the sample discharge pipe (203). After discharge, the shut-off butterfly valve (210) is closed by the automatic control equipment (206). After the image is captured, the automatic control device (306) displays the image capture result of the camera device (307) so that the operator can directly analyze the image capture result and send the image capture result to the analysis device for analyzing the sample so that it can be analyzed.

[0011] This method enables automated sampling of samples from the sample discharge device, which can greatly reduce the workload of manual sampling, significantly reduce the impact of the sampling environment on the health of operators, and greatly increase the sampling frequency, thereby enabling timely and rapid analysis results. Based on this, relevant parameters can be quickly adjusted according to the analysis results, greatly improving the flexibility and efficiency of the production process.

[0012] Furthermore, after the camera device (307) finishes taking pictures and the flip plate (208) is opened, the automatic control device (206) controls the water atomization system (205) to clean the flip plate (208) to avoid the sample residue left on the flip plate (208) from affecting the next sampling.

[0013] A system for obtaining ash samples from a pressurized coal gasification furnace includes a programmable logic controller (PLC) installed within an automatic control device (206). The specific control steps of the PLC include: The programmable logic controller controls the flap (208) to be in the open state under normal conditions. When the slag collection equipment (204) needs to collect samples, the programmable logic controller controls the flap (208) to be closed. When the weight of slag collected on the flap (208) reaches s, the staff can set the weight s value according to the collection situation. The programmable logic controller controls the water atomization system (205) to be opened to process the slag. It also controls the dust cover on the surface of the camera device (207) to be opened and controls the camera device (207) to take pictures. After the pictures are taken, the dust cover is closed. The camera device (207) is connected to the automatic control equipment (206) and can directly display the image structure on the slag mining equipment (204) for analysis; The programmable logic controller controls the flap (208) to reopen. When the gravity sensor on the flap (208) shows a gravity of 0, the programmable logic controller controls the water atomization system (205) to flush the flap (208), and closes the shut-off butterfly valve (210) after flushing.

[0014] The beneficial effects of the technical solution provided by this invention include: (i) The equipment coordinates the operation of the flap (208), water atomization system (205), camera device (207) and shut-off butterfly valve (210) through automatic control equipment (206), eliminating the need for manual on-site sampling operations and avoiding the health damage to operators caused by high temperature and high dust sampling environment; at the same time, it can increase the sampling frequency, realize high frequency and normalized sampling, and greatly reduce the workload of manual sampling.

[0015] (ii) The equipment precisely controls the sampling weight through the gravity sensor on the flip plate (208) to ensure that the sampling amount is stable and consistent each time; in conjunction with the water atomization system (205) to suppress floating dust, eliminate the interference of dust on camera shooting and improve the clarity of image acquisition; after sampling, the flip plate (208) is automatically rinsed to avoid the residual ash residue causing cross-contamination to the next sampling, and to ensure the accuracy and reference of the sample analysis results.

[0016] (III) The sampling equipment and the slag discharge equipment (202) are linked, and the sampling process does not interrupt the normal slag discharge process. The collected ash and slag can be returned to the slag ditch (201) or the slag discharge equipment (202) through the sample discharge pipe (203), without affecting the continuous production of the gasifier. At the same time, the sampled images can be output and analyzed in real time, which makes it easy to quickly adjust the gasifier operating parameters according to the ash and slag status, thereby improving the flexibility of the production process and the overall operating efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a sampling device for obtaining ash and slag samples in a pressurized coal gasification furnace according to the present invention; Figure 2 This is a schematic diagram illustrating different configurations of the sample discharge tube according to the present invention; Figure 3 This is a schematic diagram showing the installation position of the shut-off butterfly valve of the present invention.

[0018] In the diagram: 201, slag ditch; 202, slag discharge equipment; 203, sample discharge pipe; 204, slag collection equipment; 205, water atomization system; 206, automatic control equipment; 207, camera device; 208, flap; 209, sample inlet pipe; 210, shut-off butterfly valve. Detailed Implementation

[0019] Example 1, see Figure 1 A technical solution is provided: A sampling device for obtaining ash samples in a pressurized coal gasification furnace includes a ash discharge device (202), a ash collection device (204), and a ash ditch (201). The ash ditch (201) is used to receive the ash discharged by the ash discharge device (202). The ash discharge device (202) and the ash collection device (204) are connected by a sample introduction pipe (209). The sample introduction pipe (209) is used to introduce the ash falling in the ash discharge device (202) into the ash collection device (204). The bottom of the slag collection device (204) is equipped with a sample discharge pipe (203), the bottom of which is connected to the slag ditch (201) or the slag discharge device (202). The inside of the slag collection device (204) is equipped with a flap (208), which is located between the sample discharge pipe (203) and the sample inlet pipe (209) and the connection point. The flap (208) is normally in the open state. The slag removal equipment (204) is also equipped with a water atomization system (205), which is located above the flap (208) and removes floating ash by spraying water mist. The top of the slag collection device (204) is equipped with a camera device (207) and an automatic control device (206). The camera device (207) is used to photograph the ash and slag collected on the flip plate (208). The automatic control device (306) is used to control the sampling device. The surface of the camera device (207) is equipped with a dust cover, which can be designed with a double butterfly valve. The flap (208) is configured to flip, including a double-door flip or a single-door flip. The surface of the flap (208) is provided with a gravity sensor that can collect weight, which is used to collect the weight of the slag and ash on the top of the flap (208).

[0020] The sampling equipment for obtaining ash samples from the pressurized coal gasification furnace is fully automated by an automatic control device (206) with a built-in programmable logic controller. The complete operation process is divided into seven stages: standby, sampling triggering, sample collection, dust suppression, image acquisition, sample discharge, and cleaning and reset. The specific operation steps are as follows: Step 1: Standby / Ready-to-Go Phase; During power-on initialization and normal production operation of the gasifier, the equipment remains in standby mode. 1. The flap (208) remains open, and the passage between the sample inlet tube (209) and the sample outlet tube (203) remains open; 2. The shut-off butterfly valve (210) in the sample discharge pipe (203) is in the closed state, blocking the backflow of water vapor and ash slag from the slag ditch (201) into the slag collection equipment (204); 3. The water atomization system (205) and camera device (207) are both in standby and off state, and the dust cover on the outside of the camera lens is kept closed to isolate the floating dust pollution on site; 4. The gravity sensor on the surface of the flip plate (208) starts real-time monitoring, and the automatic control equipment (206) waits for the sampling trigger signal.

[0021] Step 2: Sampling Triggering and Sample Collection; When the slag discharge equipment (202) starts discharging ash and slag, or when the automatic control equipment (206) receives a sampling notification from the sample discharge control system, the sampling process is automatically started: 1. The automatic control device (206) immediately controls the flap (208) to close. The ash and slag flowing out from the slag discharge device (202) and diverted into the slag collection device (204) through the sample introduction pipe (209) are intercepted on the flap (208) and sample collection begins. 2. The gravity sensor detects the weight of the ash on the flip plate (208) in real time. When the weight reaches the threshold s preset by the staff, it is determined that the sample collection amount meets the detection requirements.

[0022] Step 3: Water mist dust suppression treatment; Once the sample weight meets the standard, an automatic dust reduction process is performed to improve image clarity. 1. The automatic control equipment (206) starts the water atomization system (205) above the flap (208) to continuously spray water mist onto the ash sample, suppressing floating ash and removing floating dust from the surface of the ash; 2. After the preset dust suppression time ends, the automatic control equipment (206) shuts down the water atomization system (205) to complete the dust suppression process.

[0023] Step 4: Sample Image Acquisition; After dust suppression is completed, the image acquisition phase begins: 1. The automatic control device (206) first controls the dust cover of the camera device (207) to open, and then starts the camera device (207) to take pictures of the ash sample on the flip plate (208); 2. Immediately after shooting, close the camera dust cover to prevent lens contamination during subsequent dust removal and cleaning processes; 3. The captured images of ash and slag can be directly displayed on the slag mining equipment (204) for manual analysis by on-site personnel, or can be simultaneously transmitted to a dedicated analysis device for automated detection and analysis.

[0024] Step 5: Sample discharge; After image acquisition is complete, perform the sample ejection operation: 1. The automatic control device (206) controls the flap (208) to flip and open again, and the ash sample on the flap (208) falls into the sample discharge pipe (203) below under the action of gravity. 2. Simultaneously open the shut-off butterfly valve (210) in the sample discharge pipe (203), and the ash slag is discharged into the slag ditch (201) through the sample discharge pipe (203), or flows back to the slag discharge equipment (202) to complete the sample discharge.

[0025] Step Six: Equipment Cleaning and Reset; Once the gravity sensor detects that the weight on the flap (208) has returned to zero (the ash and slag have been completely emptied), the equipment cleaning and standby reset are executed. 1. The automatic control equipment (206) restarts the water atomization system (205) to rinse the surface of the flip plate (208) and remove residual ash and residue to avoid residual samples interfering with the accuracy of the next sampling. 2. After rinsing, turn off the water atomization system (205) and the shut-off butterfly valve (210) in sequence to restore the backflush protection state; 3. The flip plate (208) remains open, and the device returns to the initial standby mode, waiting for the next sampling command.

[0026] Example 2, based on Example 1, see [link / reference] Figure 2 A technical solution is provided: The bottom of the sample discharge pipe (203) is connected to the slag ditch (201) or the slag discharge device (202) to discharge the sampled ash slag into the slag ditch (201), or it is connected to the slag discharge device (202) to discharge the sampled ash slag into the slag discharge device (202); thus facilitating the recycling of ash slag.

[0027] For some uncontaminated ash residue, it can be directly discharged outside the slag ditch (201), or the collected ash residue can be stored in a special device for storing samples to achieve the purpose of collection and preservation; a shut-off butterfly valve (210) is installed in the sample discharge pipe (203), the shut-off butterfly valve (210) is located below the flap (208), and the shut-off butterfly valve (210) can prevent the ash residue discharged from the sample discharge pipe (203) from backflow.

[0028] Example 3, based on Examples 1 and 2, see [reference] Figure 3 A technical solution is provided: A method for obtaining ash samples from a pressurized coal gasification furnace, the specific implementation steps of which are as follows: When the ash is discharged through the ash discharge device (202), the automatic control device (206) controls the flap (208) to close. The flap (208) collects the ash discharged from the ash discharge device (202) and falls into the ash collection device (204) through the sample introduction pipe (209). The automatic control device (206) controls the water atomization system (205) to open, to process the ash and slag, and controls the water atomization system (205) to close after processing; it can quickly remove dust and debris, improve the efficiency of sampling and the sampling effect; The automatic control device (206) controls the camera device (207) to take pictures of the samples collected on the flip plate (208), and controls the flip plate (208) to open after the shooting is completed, so that the ash collected on the flip plate (208) is discharged from the slag collection device (204) through the sample discharge pipe (203). After the camera device (307) finishes taking pictures and the flap (208) is opened, the automatic control device (206) controls the water atomization system (205) to clean the flap (208); The ash and slag discharged from the slag extraction equipment (204) are discharged into the slag ditch (201) or slag discharge equipment (202) through the sample discharge pipe (203). After discharge, the shut-off butterfly valve (210) is closed by the automatic control equipment (206). After the image is captured, the automatic control device (306) displays the image capture result of the camera device (307).

[0029] Example 4, based on Examples 1, 2, and 3, refers to... Figure 1-3 A technical solution is provided: A system for obtaining ash samples from a pressurized coal gasification furnace includes a programmable logic controller (PLC) installed within an automatic control device (206). The specific control steps of the PLC include: The programmable logic controller controls the flap (208) to be in the open state under normal conditions. When the slag collection equipment (204) needs to collect samples, the programmable logic controller controls the flap (208) to be closed. When the weight of slag collected on the flap (208) reaches s, the staff can set the weight s value according to the collection situation. The programmable logic controller controls the water atomization system (205) to be opened to process the slag. It also controls the dust cover on the surface of the camera device (207) to be opened and controls the camera device (207) to take pictures. After the pictures are taken, the dust cover is closed. The camera device (207) is connected to the automatic control equipment (206) and can directly display the image structure on the slag mining equipment (204) for analysis; The programmable logic controller controls the flap (208) to reopen. When the gravity sensor on the flap (208) shows a gravity of 0, the programmable logic controller controls the water atomization system (205) to flush the flap (208), and closes the shut-off butterfly valve (210) after flushing.

[0030] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. The scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A sampling device for obtaining ash and slag samples from a pressurized coal gasification furnace, characterized in that, It includes a slag discharge device (202), a slag collection device (204), and a slag ditch (201). The slag ditch (201) is used to receive the ash and slag discharged by the slag discharge device (202). The slag discharge device (202) and the slag collection device (204) are connected by a sample introduction pipe (209). The sample introduction pipe (209) is used to introduce the ash and slag falling in the slag discharge device (202) into the slag collection device (204). The bottom of the slag collection device (204) is equipped with a sample discharge pipe (203), and the inside of the slag collection device (204) is equipped with a flap (208). The flap (208) is located between the sample discharge pipe (203) and the sample inlet pipe (209) and the connection point. The flap (208) is normally in the open state. The slag removal equipment (204) is also equipped with a water atomization system (205), which is located above the flap (208) and removes floating ash by spraying water mist. The top of the slag collection device (204) is equipped with a camera device (207) and an automatic control device (206). The camera device (207) is used to photograph the ash and slag collected on the flip plate (208), and the automatic control device (306) is used to control the sampling device.

2. The sampling device for obtaining ash and slag samples from a pressurized coal gasification furnace according to claim 1, characterized in that: The bottom of the sample discharge pipe (203) is connected to the slag ditch (201) or the slag discharge device (202).

3. The sampling device for obtaining ash and slag samples from a pressurized coal gasification furnace according to claim 1, characterized in that: The camera device (207) is provided with a dust cover on its surface, which is designed with a double butterfly valve.

4. The sampling device for obtaining ash and slag samples from a pressurized coal gasification furnace according to claim 1, characterized in that: A shut-off butterfly valve (210) is installed in the sample discharge tube (203), and the shut-off butterfly valve (210) is located below the flap (208).

5. The sampling device for obtaining ash and slag samples from a pressurized coal gasification furnace according to claim 1, characterized in that: The flap (208) is configured to flip, including a double-door flip mode or a single-door flip mode.

6. The sampling device for obtaining ash and slag samples from a pressurized coal gasification furnace according to claim 5, characterized in that: The surface of the flap (208) is provided with a gravity sensor that can collect weight, which is used to collect the weight of the slag and ash on the top of the flap (208).

7. A method for obtaining ash samples from a pressurized coal gasification furnace, based on the sampling equipment of any one of claims 1-6, specifically comprising the following steps: When the ash is discharged through the ash discharge device (202), the automatic control device (206) controls the flap (208) to close. The flap (208) collects the ash discharged from the ash discharge device (202) and falls into the ash collection device (204) through the sample introduction pipe (209). The automatic control equipment (206) controls the water atomization system (205) to open, to process the ash and slag, and controls the water atomization system (205) to close after processing is completed. The automatic control device (206) controls the camera device (207) to take pictures of the samples collected on the flip plate (208), and controls the flip plate (208) to open after the shooting is completed, so that the ash collected on the flip plate (208) is discharged from the slag collection device (204) through the sample discharge pipe (203). The ash and slag discharged from the slag extraction equipment (204) are discharged into the slag ditch (201) or slag discharge equipment (202) through the sample discharge pipe (203). After discharge, the shut-off butterfly valve (210) is closed by the automatic control equipment (206). After the image is captured, the automatic control device (306) displays the image capture result of the camera device (307).

8. The method for obtaining ash samples from a pressurized coal gasification furnace according to claim 7, characterized in that: After the camera device (307) finishes taking pictures and the flip plate (208) is opened, the automatic control device (206) controls the water atomization system (205) to clean the flip plate (208).

9. The sampling device for obtaining ash samples from a pressurized coal gasification furnace according to any one of claims 1-6 is now proposed as a system for obtaining ash samples from a pressurized coal gasification furnace, characterized in that: This includes a programmable logic controller (PLC), which is installed within the automatic control equipment (206), and its specific control steps include: The programmable logic controller controls the flap (208) to be in the open state under normal conditions. When the slag collection equipment (204) needs to sample, the programmable logic controller controls the flap (208) to be closed. When the weight of slag collected on the flap (208) reaches s, the programmable logic controller controls the water atomization system (205) to be opened to process the slag. It also controls the dust cover on the surface of the camera device (207) to be opened and controls the camera device (207) to take pictures. After the pictures are taken, the dust cover is closed. The camera device (207) is connected to the automatic control equipment (206) and can directly display the image structure on the slag mining equipment (204) for analysis; The programmable logic controller controls the flap (208) to reopen. When the gravity sensor on the flap (208) shows a gravity of 0, the programmable logic controller controls the water atomization system (205) to flush the flap (208), and closes the shut-off butterfly valve (210) after flushing.

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