Purification system capable of fully reacting industrial waste gas with catalyst and method of using the same

Abstract

The present invention discloses a purification system capable of fully reacting industrial waste gas with a catalyst and a method for using the same, relating to the field of waste gas purification technology. The system comprises a reaction device, a separation device, a feeding device, a cooling device, a bag dust removal device, and a PLC controller. The feeding device is connected to the reaction device and is used to transport catalyst particles into the reaction device. Under the control of the PLC, the system automatically replenishes the catalyst particles to the reaction device according to the purification effect of the waste gas. The boiling plate provided by the present invention can be used to place a large amount of catalyst. When the waste gas passes through the boiling plate from bottom to top, it impacts the catalyst on the boiling plate, causing the catalyst to be in a boiling state. During this process, the waste gas fully contacts and reacts with the catalyst on the boiling plate. The overall structure is simple and convenient for installation, disassembly, and maintenance. It not only optimizes the structure used in the waste gas purification process, but also improves the efficiency of waste gas purification.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas purification, and in particular to a purification system capable of fully reacting industrial waste gas with a catalyst and a method for using the same. Background Art

[0002] At present, coal-fired power plants and coal-fired boilers use two-stage desulfurization and denitrification technology, using lime ammonia water. Existing industrial tail gas treatment uses quicklime and ammonia. The process is complex, the process flow is long, many equipment are used, many derivative products are produced, and the system stability is poor. Moreover, the overall structure is large and the process is complex, which causes corrosion to the equipment. As a result, the system maintenance cycle is short and the maintenance workload is large, which will increase the overall cost of use and fail to effectively purify the exhaust gas. Summary of the Invention

[0003] The main purpose of the present invention is to provide a purification system and a method of using the system that can fully react industrial waste gas with a catalyst. The system uses fewer devices as a whole, has stronger stability, is not large in overall size and has a simple process flow, and can further enable the catalyst to fully react with the waste gas.

[0004] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0005] A purification system that can make industrial waste gas fully react with catalyst, including a reaction device, a separation device, a feeding device, a cooling device, a bag dust removal device and a PLC controller.

[0006] The feeding device is connected to the reaction device, and is used to transport catalyst particles into the reaction device and automatically replenish catalyst particles to the reaction device according to the purification effect of the exhaust gas under the control of the PLC controller;

[0007] The separation device is connected to the reaction device and is used to receive a mixture of gas passing through the catalyst and part of the catalyst, and separate the mixture to separate the gas and catalyst particles, and transport the gas to the bag dust removal device, and transport the separated catalyst particles to the reaction device;

[0008] The reaction device includes a reaction tower, inside which is disposed a catalyst boiling plate for reacting with and purifying exhaust gas. The boiling plate comprises a plate body and a plurality of gas passages extending through the top surface of the plate body. The outer circumference of the gas passages is penetrated by a plurality of through-holes, forming a conveying channel for the exhaust gas. A downwardly opening cap is provided at the top of the gas passage, and the through-holes are located within the inner cavity of the cap. The reaction tower has an inlet and an outlet, and the boiling plate is disposed above one of the inlets of the reaction tower, allowing external exhaust gas to enter the reaction tower through the inlet and pass through the gas passages.

[0009] Preferably, the reaction tower includes a tower body and a lower tower cover distributed up and down, the lower tower cover has an inlet for allowing external exhaust gas to be discharged into the reaction tower through the inlet of the lower tower cover, and the boiling plate is arranged above the lower tower cover.

[0010] The reaction tower also includes an upper tower cover arranged at the top of the tower body. The upper tower cover has an outlet for discharging the gas passing through the boiling plate outward through the upper tower cover outlet. A pipeline is connected between the outlet of the upper tower cover and the separation device.

[0011] Preferably, a feeding hole is passed through the side of the tower body, and a first feeding pipe is connected between the feeding device and the feeding hole for feeding the catalyst from the outside into the tower body.

[0012] The feed hole is arranged above the gas passage, and a second feed pipe is connected between the bottom of the separation device and the feed hole for returning the separated catalyst to the reaction tower.

[0013] Preferably, a first ring plate is fixed to the top of the lower tower cover, a second ring plate is fixed to the bottom end of the tower body, the plate body is arranged between the first ring plate and the second ring plate, and the plurality of gas passages are arranged on the inner side of the tower body.

[0014] Preferably, the outer circumference of the first ring plate protrudes from the outer circumference of the lower tower cover, the outer circumference of the second ring plate protrudes from the outer circumference of the tower body, and the plate body diameter is larger than the inner diameter of the first ring plate and the second ring plate.

[0015] Preferably, a cooling device is connected between the separation device and the bag-type dust removal device for cooling the gas transported to the bag-type dust removal device. A temperature sensor is provided at the gas outlet of the separation device. Under the control of a PLC controller, the cooling device automatically adjusts the amount of cooling water in the cooling device according to the temperature of the gas outlet of the separation device to ensure that the temperature entering the bag-type dust removal device meets the dust removal requirements.

[0016] Preferably, it also includes a control device, a first gas sensor and a second gas sensor. The first gas also includes a first gas sensor and a second gas sensor. The first gas sensor is arranged at the outlet of the bag dust removal device to detect the composition and concentration of the gas after being filtered by the bag dust removal device. The second gas sensor is used to detect the composition and concentration of the exhaust gas before entering the reaction tower. The first gas sensor and the second gas sensor respectively transmit their respective detection data to the PLC controller, and the PLC controller adjusts the catalyst delivery amount of the feeding device according to the received detection data.

[0017] A method for using a purification system that allows industrial waste gas to fully react with a catalyst comprises the following steps:

[0018] Step 1: injecting a catalyst for purifying flue gas onto the boiling plate through a feeding device so that the catalyst covers the gas passage;

[0019] Step 2: The flue gas is transported upward from the inlet of the lower tower cover and passes through the boiling plate. When the flue gas comes out from the through holes on the gas passage, it impacts the catalyst on the boiling plate, causing the catalyst to boil. The boiling catalyst fully reacts with the rising flue gas.

[0020] Step 3: The flue gas after reacting with the catalyst continues to rise, carrying part of the catalyst with it. During the rising process, the flue gas and the lifted catalyst will contact and react again until the mixture of the two is transported from the outlet of the reaction tower to the separation device;

[0021] Step 4: The separation device separates the mixture of gas and a portion of the catalyst, the separated catalyst is returned to the reaction tower, and the separated gas enters the cooling device;

[0022] Step 5: Adjust the gas temperature to a preset temperature or below through heat exchange in a heat exchanger to ensure that the bags of the bag filter are not damaged by heat;

[0023] Step 6: The bag dust removal device consists of a box, a bag and a soot blowing module, which is used to remove dust from the gas after the reaction containing ash and finally discharge the clean gas.

[0024] Preferably, the preset temperature is below 100°C. In step 2, the flue gas will be transported upward from the entrance of the lower tower cover only after the second gas sensor detects the composition and concentration of the flue gas, and after the second gas sensor transmits the detection data to the PLC controller, the PLC controller controls the output material amount of the feeding device. If the gas concentration reaches the first preset value, the output material amount of the feeding device is high; if the gas concentration is lower than the second preset value, the output material amount of the feeding device is low.

[0025] Preferably, it also includes

[0026] Step 7: Before the bag dust removal device discharges the clean gas, the first gas sensor detects the clean gas and transmits the detection data to the PLC controller. If the gas concentration reaches a third preset value, the output material amount of the feeding device is increased.

[0027] Beneficial technical effects of the present invention:

[0028] 1. The boiling plate provided by the present invention can be used to place more catalysts. When the exhaust gas passes through the boiling plate from bottom to top, it will impact the catalyst on the boiling plate, causing the catalyst to be in a boiling state. During this process, the exhaust gas will fully contact and react with the catalyst on the boiling plate. The overall structure is simple and convenient for installation or disassembly and maintenance. It not only optimizes the structure used in the exhaust gas purification process, but also improves the efficiency of exhaust gas purification.

[0029] 2. The exhaust gas purification system provided by the present invention uses fewer devices as a whole, has strong stability, is small in size and has a simple process flow. Furthermore, the catalyst can fully react with the exhaust gas and can be automatically loaded without pausing the system operation for manual loading during the exhaust gas reaction. This not only improves the exhaust gas purification efficiency, but also saves a lot of labor costs. Furthermore, the system can also adjust the amount of catalyst input into the reaction tower according to the current exhaust gas concentration. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view structural schematic diagram of a reaction tower according to an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of the three-dimensional structure of a reaction tower according to an embodiment of the present invention;

[0032] Figure 3 is a schematic diagram of the three-dimensional structure of the lower tower cover according to an embodiment of the present invention;

[0033] Figure 4 is a schematic diagram of the three-dimensional structure of the lower tower cover and boiling plate according to an embodiment of the present invention;

[0034] Figure 5 is a schematic diagram of the three-dimensional structure of a boiling plate according to an embodiment of the present invention;

[0035] Figure 6 FIG. 2 is a schematic diagram of an overall system according to an embodiment of the present invention.

[0036] In the figure: 1-reaction tower, 101-tower body, 102-upper tower cover, 103-lower tower cover, 4-gas transmission pipe, 5-support frame, 6-window, 7-boiling plate, 701-plate body, 702-gas passage, 8-first ring plate, 9-second ring plate. DETAILED DESCRIPTION

[0037] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below with reference to embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0038] like Figures 1-6As shown, the purification system provided by this embodiment can fully react industrial waste gas with catalyst, including a reaction device, a separation device, a feeding device, a cooling device, a bag dust removal device and a PLC controller. The waste gas is flue gas.

[0039] The feeding device is connected to the reaction device and is used to transport catalyst particles into the reaction device. Under the control of the PLC controller, the catalyst particles are automatically added to the reaction device according to the purification effect of the exhaust gas.

[0040] The separation device is connected to the reaction device. As the gas rises, part of the catalyst also rises with it. It is used to receive a mixture of gas passing through the catalyst and part of the catalyst, and separate the mixture to separate the gas and the catalyst. The gas is then transported to the bag dust removal device, and the separated catalyst particles are transported to the reaction device. A cooling device is connected between the separation device and the bag dust removal device to cool the gas transported to the bag dust removal device.

[0041] The reaction device includes a reaction tower 1, and a boiling plate 7 is provided on the inner side of the reaction tower 1 for carrying a rare earth catalyst that reacts with the exhaust gas and purifies the exhaust gas. The boiling plate 7 includes a plate body 701 and a plurality of gas passages 702 penetrating the top surface of the plate body 701. The outer peripheral surface of the gas passage 702 is penetrated by a plurality of through holes for forming a conveying channel for the exhaust gas. The top of the gas passage 702 is provided with a cap with an opening downward, and the through hole is located in the inner cavity of the cap, that is, the bottom edge of the cap is lower than the position of the through hole, so as to ensure that the airflow will first enter the cap and be blocked. Then it flows downward along the cap to form a flow direction in which the airflow comes out of the gas passage 702 and then flows downward and upward, so that the catalyst on the boiling plate 7 is in a boiling state, the contact area between the exhaust gas and the catalyst is increased, and the purification efficiency is improved. When placing the catalyst, the catalyst can be covered on the plate body 701 and the gas passage 702 is covered. In this way, when the exhaust gas is transported from bottom to top, it will completely contact the catalyst when passing through the boiling plate 7, and the two will react continuously, thereby achieving the purpose of fully reacting the exhaust gas and the catalyst.

[0042] The reaction tower 1 has an inlet and an outlet, and the boiling plate 7 is arranged above the inlet of the reaction tower 1, so that the external exhaust gas enters the reaction tower 1 through the inlet of the reaction tower 1 and passes through the boiling plate 7, so that the catalyst placed on the boiling plate 7 comes into contact with the exhaust gas. The boiling plate 7 is arranged below the outlet of the reaction tower 1, so that the gas passing through the boiling plate 7 is discharged to the outside through an outlet of the reaction tower 1.

[0043] In this embodiment, the reaction tower 1 includes a tower body 101 and a lower tower cover 103 distributed up and down. The lower tower cover 103 has an inlet for allowing external exhaust gas to be discharged into the reaction tower 1 through the inlet of the lower tower cover 103. The boiling plate 7 is arranged above the lower tower cover 103. The reaction tower 1 also includes an upper tower cover 102 arranged at the top of the tower body 101. The upper tower cover 102 has an outlet for allowing the gas passing through the boiling plate 7 to be discharged outward through the outlet of the upper tower cover 102. A pipe is connected between the outlet of the upper tower cover 102 and the separation device, so that the exhaust gas can be transported from bottom to top. When passing through the boiling plate 7, it can impact and fully contact the catalyst thereon, so that the catalyst on the boiling plate 7 can be continuously in a "boiling" state, and some of the catalyst will be in a suspended state, which is conducive to the full reaction of the catalyst and the exhaust gas.

[0044] In this embodiment, a feed hole is passed through the side of the tower body 101, and a first feed pipe is connected between the feeding device and the feed hole for transporting the catalyst from the outside to the tower body 101. The feed hole is arranged above the gas passage 702, and a second feed pipe is connected between the bottom of the separation device and the feed hole for returning the separated catalyst to the reaction tower 1. The feeding device includes a feeder, and the feeding device also includes an air compressor and a frequency converter for controlling the amount of material fed by the feeder. The frequency converter can be used to manually set the feeding parameters.

[0045] In this embodiment, a first ring plate 8 is fixed to the top of the lower tower cover 103, and a second ring plate 9 is fixed to the bottom end of the tower body 101. The plate body 701 is arranged between the first ring plate 8 and the second ring plate 9. The plate body 701 is a disc-type structure. Without affecting the stability and sealing of the reaction tower 1, it also effectively ensures that the boiling plate 7 is tightly fixed. A plurality of gas passages 702 are arranged on the inner side of the tower body 101. The gas passages 702 are hollow cylindrical structures, and the cover plate is a barrel-shaped structure with the barrel mouth set downward.

[0046] In this embodiment, the outer circumference of the first ring plate 8 protrudes from the outer circumference of the lower tower cover 103, and the outer circumference of the second ring plate 9 protrudes from the outer circumference of the tower body 101. The diameter of the plate body 701 is larger than the inner diameter of the first ring plate 8 and the second ring plate 9.

[0047] In this embodiment, the cooling device includes a cooling water tank, a water pump and a heat exchanger. The cooling water tank is connected to a water pipe, which is inserted into the heat exchanger. A gas pipeline is connected between the heat exchanger and the bag dust collector. A temperature sensor is provided at the gas outlet of the separation device to detect the temperature of the cooled gas. The PLC controller is also used to receive detection data from the temperature sensor to adjust the flow rate of cooling water. Under the control of the PLC controller, the cooling device automatically adjusts the amount of cooling water in the cooling device according to the temperature of the gas outlet of the separation device to ensure that the temperature entering the bag dust collector meets the dust removal requirements.

[0048] In this embodiment, a first gas sensor and a second gas sensor are also included. The first gas sensor is arranged at the outlet of the bag dust removal device to detect the composition and concentration of the gas after being filtered by the bag dust removal device. The second gas sensor is used to detect the composition and concentration of the exhaust gas before entering the reaction tower 1.

[0049] The first gas sensor and the second gas sensor respectively transmit their detection data to the PLC controller, and the PLC controller adjusts the catalyst delivery amount of the feeding device according to the received detection data.

[0050] A method for using a purification system that allows industrial waste gas to fully react with a catalyst comprises the following steps:

[0051] Step 1: injecting a catalyst for purifying flue gas onto the boiling plate 7 through a feeding device, so that the catalyst covers the top of the gas passage 702 and ensures that the flue gas will flush away part of the catalyst;

[0052] Step 2: The flue gas is transported upward from the inlet of the lower tower cover 103. The flue gas enters the reaction tower 1 at a certain speed, passes through the boiling plate 7, and when the flue gas exits from the through holes on the gas passage 702, it impacts the catalyst on the boiling plate 7, causing the catalyst to boil. The boiling catalyst fully reacts with the rising flue gas.

[0053] Step 3: The flue gas after reacting with the catalyst continues to rise, carrying part of the catalyst with it. During the rising process, the flue gas and the lifted catalyst will contact and react again until the mixture of the two is transported from the outlet of the reaction tower 1 to the separation device;

[0054] Step 4: The separation device separates the mixture of gas and a portion of the catalyst, and the separated catalyst is returned to the reaction tower 1, and the separated gas enters the cooling device;

[0055] Step 5: Adjust the gas temperature to a preset temperature or below through heat exchange in a heat exchanger to ensure that the bags of the bag filter are not damaged by heat;

[0056] Step 6: The bag dust removal device consists of a box, a bag and a soot blowing module, which is used to remove dust from the gas after the reaction containing ash and finally discharge the clean gas.

[0057] In this embodiment, the preset temperature is below 100°C. In step 2, the flue gas will be transported upward from the entrance of the lower tower cover 103 only after the second gas sensor detects the composition and concentration of the flue gas, and after the second gas sensor transmits the detection data to the PLC controller, the PLC controller controls the output material amount of the feeding device. If the gas concentration reaches the first preset value, the output material amount of the feeding device is high, which can be a speed of 1m / s. If the gas concentration is lower than the second preset value, the output material amount of the feeding device is low, which can be a speed of 0.4m / s. The second preset value is less than the first preset value.

[0058] In this embodiment, step 7 is also included. Before the bag dust removal device discharges the clean gas, the first gas sensor detects the clean gas and transmits the detection data to the PLC controller. If the gas concentration reaches a third preset value, the output material amount of the feeding device is increased. The third preset value is slightly higher than the flue gas emission standard to avoid insufficient amount of catalyst during the flue gas purification process, resulting in the discharged gas not meeting the standard. It can be ensured that the gas discharged after the flue gas purification using this system meets the standard.

[0059] To sum up, in this embodiment, the exhaust gas purification system provided in this embodiment uses fewer devices as a whole, has stronger stability, and is not large in overall size and has a simple process flow. Furthermore, the catalyst can fully react with the exhaust gas, and can be automatically loaded without pausing the system operation for manual loading during the exhaust gas reaction. This not only improves the exhaust gas purification efficiency, but also saves a lot of labor costs. Furthermore, the system can also adjust the amount of catalyst input into the reaction tower according to the current exhaust gas concentration.

[0060] The above is only a further embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which fall within the scope of protection of the present invention.

Claims

1. A purification system that allows industrial waste gas to fully react with a catalyst, characterized by: It includes reaction device, separation device, feeding device, cooling device, bag dust removal device and PLC controller. The feeding device is connected to the reaction device, and is used to transport catalyst particles into the reaction device and automatically replenish catalyst particles to the reaction device according to the purification effect of the exhaust gas under the control of the PLC controller; The separation device is connected to the reaction device and is used to receive a mixture of gas passing through the catalyst and part of the catalyst, and separate the mixture to separate the gas and catalyst particles, and transport the gas to the bag dust removal device, and transport the separated catalyst particles to the reaction device; The reaction device comprises a reaction tower (1), wherein the inner side of the reaction tower (1) is provided with a catalyst boiling plate (7) for carrying a catalyst for reacting with exhaust gas and purifying the exhaust gas, the boiling plate (7) comprises a plate body (701) and a plurality of gas passages (702) penetrating the top surface of the plate body (701), the outer peripheral surface of the gas passage (702) is penetrated by a plurality of through holes for forming a conveying channel for the exhaust gas, and the top end of the gas passage (702) is provided with a cap with an opening facing downward, and the through holes are located in the inner cavity of the cap, the reaction tower (1) has an inlet and an outlet, and the boiling plate (7) is provided above an inlet of the reaction tower (1) for allowing external exhaust gas to enter the reaction tower (1) through the inlet and pass through the gas passage (702); The reaction tower (1) comprises a tower body (101) and a lower tower cover (103) arranged vertically. The lower tower cover (103) has an inlet for allowing external exhaust gas to be discharged into the reaction tower (1) through the inlet of the lower tower cover (103). The boiling plate (7) is arranged above the lower tower cover (103). The reaction tower (1) further comprises an upper tower cover (102) arranged at the top of the tower body (101), the upper tower cover (102) having an outlet for allowing the gas passing through the boiling plate (7) to be discharged outward through the outlet of the upper tower cover (102), and a pipeline is connected between the outlet of the upper tower cover (102) and the separation device; A material delivery hole is passed through the side of the tower body (101); a first material delivery pipe is connected between the feeding device and the material delivery hole, and is used to deliver the catalyst from the outside to the inside of the tower body (101); The feed hole is arranged above the gas passage (702), and a second feed pipe is connected between the bottom of the separation device and the feed hole, for returning the separated catalyst to the reaction tower (1).

2. The purification system capable of fully reacting industrial waste gas with a catalyst according to claim 1, characterized in that: A first ring plate (8) is fixed to the top end of the lower tower cover (103), a second ring plate (9) is fixed to the bottom end of the tower body (101), the plate body (701) is arranged between the first ring plate (8) and the second ring plate (9), and a plurality of gas passages (702) are arranged on the inner side of the tower body (101).

3. The purification system capable of fully reacting industrial waste gas with a catalyst according to claim 2, characterized in that: The outer peripheral surface of the first ring plate (8) protrudes from the outer peripheral surface of the lower tower cover (103), the outer peripheral surface of the second ring plate (9) protrudes from the outer peripheral surface of the tower body (101), and the diameter of the plate body (701) is respectively larger than the inner diameter of the first ring plate (8) and the second ring plate (9).

4. The purification system capable of fully reacting industrial waste gas with a catalyst according to claim 1, characterized in that: A cooling device is connected between the separation device and the bag-type dust removal device, which is used to cool the gas transported to the bag-type dust removal device. A temperature sensor is provided at the gas outlet of the separation device. Under the control of the PLC controller, the cooling device automatically adjusts the amount of cooling water in the cooling device according to the temperature of the gas outlet of the separation device to ensure that the temperature entering the bag-type dust removal device meets the dust removal requirements.

5. The purification system capable of fully reacting industrial waste gas with a catalyst according to claim 1, characterized in that: It also includes a first gas sensor and a second gas sensor. The first gas sensor is arranged at the outlet of the bag dust removal device and is used to detect the composition and concentration of the gas after being filtered by the bag dust removal device. The second gas sensor is used to detect the composition and concentration of the exhaust gas before it enters the reaction tower (1). The first gas sensor and the second gas sensor respectively transmit their detection data to the PLC controller, and the PLC controller adjusts the catalyst delivery amount of the feeding device according to the received detection data.

6. The method for using the purification system capable of fully reacting industrial waste gas with a catalyst according to any one of claims 1 to 5, characterized in that: Includes the following steps Step 1: injecting a catalyst for purifying flue gas onto the boiling plate (7) through a feeding device, so that the catalyst covers the gas passage (702); Step 2: The flue gas is transported upward from the inlet of the lower tower cover (103) and passes through the boiling plate (7). When the flue gas comes out from the through hole on the gas passage (702), it impacts the catalyst on the boiling plate (7), causing the catalyst to be in a boiling state. The catalyst in the boiling state fully reacts with the rising flue gas; Step 3: The flue gas after reacting with the catalyst continues to rise, and takes part of the catalyst with it. During the rising process, the flue gas and the catalyst in the air will contact and react again until the mixture of the two is transported from the outlet of the reaction tower (1) to the separation device; Step 4: The separation device separates the mixture of gas and a portion of the catalyst, the separated catalyst is returned to the reaction tower (1), and the separated gas enters the cooling device; Step 5: Adjust the gas temperature to a preset temperature or below through heat exchange in a heat exchanger to ensure that the bags of the bag filter are not damaged by heat; Step 6: The bag dust removal device consists of a box, bags and a soot blowing module, which is used to remove dust from the gas after the reaction containing ash and finally discharge the clean gas.

7. The method for using the purification system capable of fully reacting industrial waste gas with a catalyst according to claim 6, characterized in that: The preset temperature is below 100°C. In step 2, the flue gas is transported upward from the inlet of the lower tower cover (103) only after the second gas sensor detects the composition and concentration of the flue gas. After the second gas sensor transmits the detection data to the PLC controller, the PLC controller controls the output amount of the feeding device. If the gas concentration reaches a first preset value, the output amount of the feeding device is high. If the gas concentration is lower than a second preset value, the output amount of the feeding device is low.

8. The method for using the purification system capable of fully reacting industrial waste gas with a catalyst according to claim 6, characterized in that: Also includes Step 7: Before the bag dust removal device discharges the clean gas, the first gas sensor detects the clean gas and transmits the detection data to the PLC controller. If the gas concentration reaches a third preset value, the output material amount of the feeding device is increased.

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